update mocha-common

mocha-common

@@ -1 +1 @@
-Subproject commit 5a411ddf69be2a2f32c601fe57004e839e3805c0
+Subproject commit 4581cd44fa4c70c8b596cc50d056152b7498a6d9

mocha-dotnet/src/lib/Mocha.Core/AttributeImplementation.cs

@@ -0,0 +1,74 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+using System.Text.Json.Nodes;
+
+namespace Mocha.Core;
+
+public abstract class AttributeImplementation<T> : AttributeImplementation
+{
+	public T ConvertFrom(Oms oms, object? value, T defaultValue = default(T))
+	{
+		object? converted = ConvertFromInternal(oms, value);
+		if (converted is T)
+		{
+			return (T)converted;
+		}
+		return defaultValue;
+	}
+
+	protected override IEnumerable<Type>? ValidDataTypes => [ typeof(T) ];
+}
+
+public abstract class AttributeImplementation : ClassImplementation
+{
+	protected virtual IEnumerable<Type>? ValidDataTypes { get; }
+	protected abstract object? ConvertFromInternal(Oms oms, object? value);
+
+	public object? ReadDerivedData(BinaryReader br)
+	{
+		return ReadDerivedDataInternal(br);
+	}
+	protected abstract object? ReadDerivedDataInternal(BinaryReader br);
+	protected abstract object? ExecuteBuildAttributeMethodInternal(Oms oms, OmsContext context, InstanceHandle method);
+	public object? ExecuteBuildAttributeMethod(Oms oms, OmsContext context, InstanceHandle method)
+	{
+		return ExecuteBuildAttributeMethodInternal(oms, context, method);
+	}
+
+	protected abstract void ExecuteBuildElementInternal(Oms oms, InstanceHandle targetInstance, InstanceHandle elementContent, InstanceHandle elementContentInstance, JsonObject objCell);
+	public void ExecuteBuildElement(Oms oms, InstanceHandle targetInstance, InstanceHandle elementContent, InstanceHandle elementContentInstance, JsonObject objCell)
+	{
+		ExecuteBuildElementInternal(oms, targetInstance, elementContent, elementContentInstance, objCell);
+	}
+
+	protected virtual void ValidateInternal(Oms oms, InstanceHandle attributeInstance, object value)
+	{
+		// do nothing by default
+	}
+	public void Validate(Oms oms, InstanceHandle attributeInstance, object value)
+	{
+		if (ValidDataTypes != null)
+		{
+			if (value != null && !ValidDataTypes.Contains(value.GetType()))
+			{
+				throw new ArgumentException(String.Format("value {0} cannot be converted to attribute type `{1}`", value is string ? "\"" + value.ToString() + "\"" : value, oms.GetInstanceText(attributeInstance)));
+			}
+		}
+		ValidateInternal(oms, attributeInstance, value);
+	}
+}

mocha-dotnet/src/lib/Mocha.Core/AttributeImplementations/BooleanAttributeImplementation.cs

@@ -0,0 +1,57 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+
+
+using System.Text.Json.Nodes;
+
+namespace Mocha.Core.AttributeImplementations;
+
+public class BooleanAttributeImplementation : AttributeImplementation<bool>
+{
+	public override Guid ClassGuid => KnownInstanceGuids.Classes.BooleanAttribute;
+
+	protected override object? ConvertFromInternal(Oms oms, object? value)
+	{
+		if (value is string)
+		{
+			return Boolean.Parse((string)value);
+		}
+		return value;
+	}
+	protected override object? ReadDerivedDataInternal(BinaryReader br)
+	{
+		throw new NotImplementedException();
+	}
+	protected override object? ExecuteBuildAttributeMethodInternal(Oms oms, OmsContext context, InstanceHandle method)
+	{
+		object? value = oms.UnsafeGetAttributeValue(method, oms.GetInstance(KnownAttributeGuids.Text.Value)); // initial value
+
+		if (value is string)
+		{
+			bool val = Boolean.Parse((string)value);
+			return val;
+		}
+		return null;
+	}
+	protected override void ExecuteBuildElementInternal(Oms oms, InstanceHandle targetInstance, InstanceHandle elementContent, InstanceHandle elementContentInstance, JsonObject objCell)
+	{
+		objCell.Add("widget", "checkBox");
+		objCell.Add("value", oms.GetAttributeValue<bool>(targetInstance, elementContentInstance));
+		objCell.Add("text", oms.GetAttributeValue<bool>(targetInstance, elementContentInstance) ? "Yes" : "No");
+	}
+}

mocha-dotnet/src/lib/Mocha.Core/AttributeImplementations/DateAttributeImplementation.cs

@@ -0,0 +1,64 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+
+
+using System.Text.Json.Nodes;
+
+namespace Mocha.Core.AttributeImplementations;
+
+public class DateAttributeImplementation : AttributeImplementation<DateTime>
+{
+	public override Guid ClassGuid => KnownInstanceGuids.Classes.DateAttribute;
+
+	protected override object? ConvertFromInternal(Oms oms, object? value)
+	{
+		if (value is string)
+		{
+			return Boolean.Parse((string)value);
+		}
+		return value;
+	}
+	protected override object? ReadDerivedDataInternal(BinaryReader br)
+	{
+		throw new NotImplementedException();
+	}
+	protected override object? ExecuteBuildAttributeMethodInternal(Oms oms, OmsContext context, InstanceHandle method)
+	{
+		object? value = oms.UnsafeGetAttributeValue(method, oms.GetInstance(KnownAttributeGuids.Text.Value)); // initial value
+
+		if (value is string)
+		{
+			DateTime val = DateTime.Parse((string)value);
+			return val;
+		}
+		return null;
+	}
+	protected override void ExecuteBuildElementInternal(Oms oms, InstanceHandle targetInstance, InstanceHandle elementContent, InstanceHandle elementContentInstance, JsonObject objCell)
+	{
+		objCell.Add("widget", "date");
+
+		DateTime dt = oms.GetAttributeValue<DateTime>(targetInstance, elementContentInstance);
+		JsonObject objDate = new JsonObject();
+		objDate.Add("Y", dt.Year.ToString());
+		objDate.Add("M", dt.Month.ToString().PadLeft(2, '0'));
+		objDate.Add("D", dt.Day.ToString().PadLeft(2, '0'));
+		objCell.Add("value", objDate);
+		objCell.Add("text", dt.ToString());
+		objCell.Add("dateTimePrecision", "DAY");
+	}
+}

mocha-dotnet/src/lib/Mocha.Core/AttributeImplementations/NumericAttributeImplementation.cs

@@ -0,0 +1,75 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+
+
+using System.Text.Json.Nodes;
+
+namespace Mocha.Core.AttributeImplementations;
+
+public class NumericAttributeImplementation : AttributeImplementation<decimal>
+{
+	public override Guid ClassGuid => KnownInstanceGuids.Classes.NumericAttribute;
+
+	protected override object? ConvertFromInternal(Oms oms, object? value)
+	{
+		if (value is string)
+		{
+			return Boolean.Parse((string)value);
+		}
+		return value;
+	}
+	protected override object? ReadDerivedDataInternal(BinaryReader br)
+	{
+		throw new NotImplementedException();
+	}
+	protected override object? ExecuteBuildAttributeMethodInternal(Oms oms, OmsContext context, InstanceHandle method)
+	{
+		object? value = oms.UnsafeGetAttributeValue(method, oms.GetInstance(KnownAttributeGuids.Numeric.Value)); // initial value
+
+		if (value is decimal)
+		{
+			return value;
+		}
+		return null;
+	}
+	protected override void ExecuteBuildElementInternal(Oms oms, InstanceHandle targetInstance, InstanceHandle elementContent, InstanceHandle elementContentInstance, JsonObject objCell)
+	{
+		objCell.Add("widget", "number");
+		objCell.Add("value", oms.GetAttributeValue<decimal>(targetInstance, elementContentInstance));
+		objCell.Add("text", oms.GetAttributeValue<decimal>(targetInstance, elementContentInstance).ToString());
+		objCell.Add("precision", 6);
+		objCell.Add("format", "#0.######");
+	}
+	protected override void ValidateInternal(Oms oms, InstanceHandle attributeInstance, object value)
+	{
+		if (oms.TryGetAttributeValue(attributeInstance, oms.GetInstance(KnownAttributeGuids.Numeric.MinimumValue), out decimal minimumValue))
+		{
+			if (((decimal)value) < minimumValue)
+			{
+				throw new ArgumentOutOfRangeException(String.Format("value for NumericAttribute must be greater than {0}", minimumValue - 1));
+			}
+		}
+		if (oms.TryGetAttributeValue(attributeInstance, oms.GetInstance(KnownAttributeGuids.Numeric.MaximumValue), out decimal maximumValue))
+		{
+			if (((decimal)value) > maximumValue)
+			{
+				throw new ArgumentOutOfRangeException(String.Format("value for NumericAttribute must be greater than {0}", maximumValue - 1));
+			}
+		}
+	}
+}

mocha-dotnet/src/lib/Mocha.Core/AttributeImplementations/TextAttributeImplementation.cs

@@ -0,0 +1,102 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+
+
+using System.Text.Json.Nodes;
+
+namespace Mocha.Core.AttributeImplementations;
+
+public class TextAttributeImplementation : AttributeImplementation<string>
+{
+	public override Guid ClassGuid => KnownInstanceGuids.Classes.TextAttribute;
+	protected override object? ConvertFromInternal(Oms oms, object? value)
+	{
+		return (string)value; //! ???
+	}
+	protected override object? ReadDerivedDataInternal(BinaryReader br)
+	{
+		int length = br.ReadInt32();
+		string value = br.ReadString();
+		return value;
+	}
+	protected override object? ExecuteBuildAttributeMethodInternal(Oms oms, OmsContext context, InstanceHandle method)
+	{
+		object? value = oms.UnsafeGetAttributeValue(method, oms.GetInstance(KnownAttributeGuids.Text.Value)); // initial value
+
+		if (value is string)
+		{
+			IEnumerable<InstanceHandle> buildsWithRambs = oms.GetRelatedInstances(method, oms.GetInstance(KnownRelationshipGuids.Build_Attribute_Method__builds_with__Build_Attribute_Method_Component));
+			foreach (InstanceHandle ihComponent in buildsWithRambs)
+			{
+				InstanceHandle ihRamb = oms.GetRelatedInstance(ihComponent, oms.GetInstance(KnownRelationshipGuids.Build_Attribute_Method_Component__uses__Executable_returning_Attribute));
+				object? val = null;
+
+				if (oms.IsInstanceOf(ihRamb, oms.GetInstance(KnownInstanceGuids.Classes.Attribute)))
+				{
+					val = null;
+				}
+				else if (oms.IsInstanceOf(ihRamb, oms.GetInstance(KnownInstanceGuids.Classes.Executable)))
+				{
+					InstanceHandle wd = oms.Execute(context, ihRamb);
+					val = context.GetWorkData(wd);
+				}
+
+				if (val is string)
+				{
+					value = ((string)value) + (string)val;
+				}
+			}
+			return value;
+		}
+		return null;
+	}
+	protected override void ExecuteBuildElementInternal(Oms oms, InstanceHandle targetInstance, InstanceHandle elementContent, InstanceHandle elementContentInstance, JsonObject objCell)
+	{
+		objCell.Add("widget", "text");
+		if (targetInstance == InstanceHandle.Empty)
+		{
+			objCell.Add("value", oms.GetAttributeValue<string>(elementContentInstance, oms.GetInstance(KnownAttributeGuids.Text.Value)));
+		}
+		else
+		{
+			objCell.Add("value", oms.GetAttributeValue<string>(targetInstance, elementContentInstance));
+		}
+	}
+
+	protected override void ValidateInternal(Oms oms, InstanceHandle attributeInstance, object value)
+	{
+		if (!(value is string))
+		{
+			throw new ArgumentException("value for TextAttribute must be System.String");
+		}
+		if (oms.TryGetAttributeValue(attributeInstance, oms.GetInstance(KnownAttributeGuids.Numeric.MinimumLength), out decimal minimumLength))
+		{
+			if (((string)value).Length < minimumLength)
+			{
+				throw new ArgumentOutOfRangeException(String.Format("value for TextAttribute must be greater than {0} characters", minimumLength - 1));
+			}
+		}
+		if (oms.TryGetAttributeValue(attributeInstance, oms.GetInstance(KnownAttributeGuids.Numeric.MaximumLength), out decimal maximumLength))
+		{
+			if (((string)value).Length > maximumLength)
+			{
+				throw new ArgumentOutOfRangeException(String.Format("value for TextAttribute must be less than {0} characters", maximumLength + 1));
+			}
+		}
+	}
+}

mocha-dotnet/src/lib/Mocha.Core/AttributeValue.cs

@@ -15,7 +15,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
 
-namespace Mocha.Core;
+namespace Mocha.Core;
 
 public struct AttributeValue
 {

mocha-dotnet/src/lib/Mocha.Core/ClassImplementation.cs

@@ -0,0 +1,24 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+namespace Mocha.Core;
+
+public abstract class ClassImplementation
+{
+	public abstract Guid ClassGuid { get; }
+	
+}

mocha-dotnet/src/lib/Mocha.Core/ClassImplementationRegistry.cs

@@ -0,0 +1,84 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+using Mocha.Core.Oop;
+
+namespace Mocha.Core;
+
+public class ClassImplementationRegistry
+{
+	private Dictionary<Guid, ClassImplementation> implementations = new Dictionary<Guid, ClassImplementation>();
+	
+	public void Register<T>(Guid methodClassId, T implementation) where T : ClassImplementation
+	{
+		implementations[methodClassId] = implementation;
+	}
+
+	public bool Contains(Guid classGuid)
+	{
+		return implementations.ContainsKey(classGuid);
+	}
+	public bool Contains<T>(Guid classGuid) where T : ClassImplementation
+	{
+		if (implementations.ContainsKey(classGuid))
+		{
+			if (implementations[classGuid] is T)
+			{
+				return true;
+			}
+		}
+		return false;
+	}
+
+	public T Get<T>(Guid classGuid) where T : ClassImplementation
+	{
+		if (implementations.ContainsKey(classGuid))
+		{
+			if (implementations[classGuid] is T obj)
+			{
+				return obj;
+			}
+		}
+		throw new NotImplementedException(String.Format("implementation for class {0} not found or incorrect type", classGuid));
+	}
+	public bool TryGet<T>(Guid classGuid, out T? implementation) where T : ClassImplementation
+	{
+		if (implementations.ContainsKey(classGuid))
+		{
+			if (implementations[classGuid] is T obj)
+			{
+				implementation = obj;
+				return true;
+			}
+		}
+		implementation = null;
+		return false;
+	}
+
+	public IEnumerable<T> GetAll<T>() where T : ClassImplementation
+	{
+		List<T> list = new List<T>();
+		foreach (KeyValuePair<Guid, ClassImplementation> kvp in implementations)
+		{
+			if (kvp.Value is T)
+			{
+				list.Add((T)kvp.Value);
+			}
+		}
+		return list;
+	}
+}

mocha-dotnet/src/lib/Mocha.Core/InstanceKey.cs

@@ -203,15 +203,15 @@ namespace Mocha.Core
 				IEnumerable<InstanceHandle> attributes = oms.GetRelatedInstances(_parentClassInstance, oms.GetInstance(KnownRelationshipGuids.Class__has__Attribute));
 				foreach (InstanceHandle att in attributes)
 				{
-					if (oms.IsInstanceOf(att, oms.GetInstance(KnownInstanceGuids.Classes.TextAttribute)))
+					AttributeImplementation? impl = oms.GetAttributeImplementation(att);
+					if (impl != null)
 					{
 						if (br.BaseStream.EndOfStream())
 						{
 							break;
 						}
 
-						int length = br.ReadInt32();
+						object? value = impl.ReadDerivedData(br);
-						string value = br.ReadString();
 						derivedData[att] = value;
 					}
 				}

mocha-dotnet/src/lib/Mocha.Core/KnownAttributeGuids.cs

@@ -28,6 +28,7 @@ namespace Mocha.Core
 			public static Guid CSSValue { get; } = new Guid("{C0DD4A42-F503-4EB3-8034-7C428B1B8803}");
 			public static Guid RelationshipType { get; } = new Guid("{71106B12-1934-4834-B0F6-D894637BAEED}");
 			public static Guid Order { get; } = new Guid("{49423f66-8837-430d-8cac-7892ebdcb1fe}");
+			public static Guid HelpText { get; } = new Guid("{edfe6493-0adf-4d49-9f19-babbe9a99acf}");
 			
 			public static Guid TargetURL { get; } = new Guid("{970F79A0-9EFE-4E7D-9286-9908C6F06A67}");
 			public static Guid ReferralURL { get; } = new Guid("{6daaa721-db70-43ad-b373-6a8038e69d2e}");
@@ -49,6 +50,8 @@ namespace Mocha.Core
         }
 		public static class Boolean
 		{
+			// {989b5a95-d5bb-470c-b067-487316d22da2}
+			public static Guid Abstract { get; } = new Guid("{868d682b-f77b-4ed4-85a9-337f338635c1}");
 			public static Guid EvaluateWorkSet { get; } = new Guid("{62c28f9e-5ce8-4ce5-8a56-1e80f1af7f6a}");
 			public static Guid MethodIsOfTypeSpecified { get; } = new Guid("{6e9df667-0f95-4320-a4be-5cdb00f1d4ee}");
 			public static Guid DisplayVersionInBadge { get; } = new Guid("{BE5966A4-C4CA-49A6-B504-B6E8759F392D}");
@@ -63,6 +66,7 @@ namespace Mocha.Core
 			public static Guid ValidateOnlyOnSubmit { get; } = new Guid("{400fcd8e-823b-4f4a-aa38-b444f763259b}");
 			public static Guid UserIsLoggedIn { get; } = new Guid("{8e93d9f3-a897-4c97-935c-b3427f90633b}");
 			public static Guid Derived { get; } = new Guid("{66991ca1-ef08-4f30-846c-4984c2a3139d}");
+			public static Guid IncludeSubclasses { get; } = new Guid("{bc95f90e-d373-48be-b71e-283695afed5a}");
 		}
 		public static class Numeric
 		{
@@ -84,5 +88,9 @@ namespace Mocha.Core
 
 			public static Guid SecondaryOperandValue { get; } = new Guid("{253a04bb-feb7-474d-b608-43219a753ef8}"); // {e666aa75-6b53-47ea-9afa-369378e17b5d}
 		}
+		public static class Date
+		{
+			public static Guid DateAndTime { get; } = new Guid("{ea71cc92-a5e9-49c1-b487-8ad178b557d2}");
+		}
 	}
 }

mocha-dotnet/src/lib/Mocha.Core/KnownInstanceGuids.cs

@@ -84,6 +84,8 @@ namespace Mocha.Core
 			public static Guid ReturnInstanceSetMethodBinding { get; } = new Guid("{AADC20F9-7559-429B-AEF0-97E059295C76}");
 			public static Guid ReturnElementMethodBinding { get; } = new Guid("{f8944cc1-1306-4c60-8079-93448ca01fd0}");
 			public static Guid BuildResponseMethodBinding { get; } = new Guid("{b457f34f-1f54-4cda-be03-2da48ec747ab}");
+			public static Guid ExecuteUpdateMethodBinding { get; } = new Guid("{b831bdaf-72d8-4585-a9a8-8341ab1005cb}");
+			public static Guid ProcessUpdatesMethodBinding { get; } = new Guid("{a7eb8676-2e47-4981-96a7-f20158660d26}");
 
 			public static Guid Executable { get; } = new Guid("{6A1F66F7-8EA6-43D1-B2AF-198F63B84710}");
 			public static Guid ExecutableReturningAttribute { get; } = new Guid("{50b2db7a-3623-4be4-b40d-98fab89d3ff5}");
@@ -194,6 +196,7 @@ namespace Mocha.Core
 			public static Guid RouteTable { get; } = new Guid("{76e5ce90-5f64-4355-a0ee-f659cf615a63}");
 
 			public static Guid Domain { get; } = new Guid("{49bbe159-0901-4788-b683-fd8f6d41b222}");
+			public static Guid PUMProcess { get; } = new Guid("{2cdb2169-7c26-4adb-bc26-e9e75ab1b246}");
 		}
 		public static class Methods
 		{

mocha-dotnet/src/lib/Mocha.Core/KnownRelationshipGuids.cs

@@ -114,6 +114,8 @@ namespace Mocha.Core
 		public static Guid Method_Binding__executes__Method { get; } = new Guid("{B782A592-8AF5-4228-8296-E3D0B24C70A8}");
 
 		public static Guid Method__has_return_type__Class { get; } = new Guid("{1241c599-e55d-4dcf-9200-d0e48c217ef8}");
+		public static Guid Method__implements__Method { get; } = new Guid("{83c992d7-03ec-483f-b6f1-225083f201e3}");
+		public static Guid Method__implemented_by__Method { get; } = new Guid("{f19e7779-a6b6-4914-a5cc-3c48fa1c9491}");
 
 		public static Guid Method_Binding__has__Parameter_Assignment { get; } = new Guid("{24938109-94f1-463a-9314-c49e667cf45b}");
 		public static Guid Parameter_Assignment__for__Method_Binding { get; } = new Guid("{19c4a5db-fd26-44b8-b431-e081e6ffff8a}");
@@ -481,5 +483,6 @@ namespace Mocha.Core
 		public static Guid Invoke_Web_Service_Method__uses__Executable_returning_Element { get; } = new Guid("{020e26ba-565d-47a4-bdcc-f0050ff6b848}");
 		public static Guid Invoke_Web_Service_Method__correlated_instances_from__Executable_returning_Instance_Set { get; } = new Guid("{8f1406b4-f48f-45fb-a6ef-2ad51998735f}");
 		public static Guid Invoke_Web_Service_Method__has_error__Executable_returning_Element { get; } = new Guid("{86aa5338-d913-4044-af8d-7aa4e1a9ddbc}");
-    }
+		
+	}
 }

mocha-dotnet/src/lib/Mocha.Core/MethodImplementation.cs

@@ -17,10 +17,8 @@
 
 namespace Mocha.Core;
 
-public abstract class MethodImplementation
+public abstract class MethodImplementation : ClassImplementation
 {
-	public abstract Guid MethodClassGuid { get; }
-
 	protected abstract InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method);
 	public InstanceHandle Execute(Oms oms, OmsContext context, InstanceHandle method)
 	{

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/AssignAttributeMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class AssignAttributeMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.AssignAttributeMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.AssignAttributeMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle irForClass = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Method__for__Class));

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/BuildAttributeMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class BuildAttributeMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.BuildAttributeMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.BuildAttributeMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle irForClass = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Method__for__Class));
@@ -32,59 +32,12 @@ public class BuildAttributeMethodImplementation : MethodImplementation
 
 		// InstanceHandle forInstance = (InstanceHandle) context.GetWorkData(irForClass);
 
-		if (oms.IsInstanceOf(returnsAttribute, oms.GetInstance(KnownInstanceGuids.Classes.TextAttribute)))
+		AttributeImplementation impl = oms.GetAttributeImplementation(returnsAttribute);
+		object? value = impl.ExecuteBuildAttributeMethod(oms, context, method);
+		if (value != null)
 		{
-			object? value = oms.UnsafeGetAttributeValue(method, oms.GetInstance(KnownAttributeGuids.Text.Value)); // initial value
-
-			if (value is string)
-			{
-				IEnumerable<InstanceHandle> buildsWithRambs = oms.GetRelatedInstances(method, oms.GetInstance(KnownRelationshipGuids.Build_Attribute_Method__builds_with__Build_Attribute_Method_Component));
-				foreach (InstanceHandle ihComponent in buildsWithRambs)
-				{
-					InstanceHandle ihRamb = oms.GetRelatedInstance(ihComponent, oms.GetInstance(KnownRelationshipGuids.Build_Attribute_Method_Component__uses__Executable_returning_Attribute));
-					object? val = null;
-
-					if (oms.IsInstanceOf(ihRamb, oms.GetInstance(KnownInstanceGuids.Classes.Attribute)))
-					{
-						val = null;
-					}
-					else if (oms.IsInstanceOf(ihRamb, oms.GetInstance(KnownInstanceGuids.Classes.Executable)))
-					{
-						InstanceHandle wd = oms.Execute(context, ihRamb);
-						val = context.GetWorkData(wd);
-					}
-
-					if (val is string)
-					{
-						value = ((string)value) + (string)val;
-					}
-				}
-			}
 			context.SetWorkData(returnsAttribute, value);
 		}
-		else if (oms.IsInstanceOf(returnsAttribute, oms.GetInstance(KnownInstanceGuids.Classes.BooleanAttribute)))
-		{
-			object? value = oms.UnsafeGetAttributeValue(method, oms.GetInstance(KnownAttributeGuids.Text.Value)); // initial value
-
-			if (value is string)
-			{
-				bool val = Boolean.Parse((string)value);
-				context.SetWorkData(returnsAttribute, val);
-			}
-		}
-		else if (oms.IsInstanceOf(returnsAttribute, oms.GetInstance(KnownInstanceGuids.Classes.NumericAttribute)))
-		{
-			object? value = oms.UnsafeGetAttributeValue(method, oms.GetInstance(KnownAttributeGuids.Numeric.Value)); // initial value
-
-			if (value is decimal)
-			{
-				context.SetWorkData(returnsAttribute, value);
-			}
-		}
-		else
-		{
-			throw new NotImplementedException();
-		}
 	
 		return returnsAttribute;
 	}

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/BuildElementMethodImplementation.cs

@@ -6,7 +6,7 @@ namespace Mocha.Core.MethodImplementations;
 public class BuildElementMethodImplementation : MethodImplementation
 {
 
-	public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.BuildElementMethod;
+	public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.BuildElementMethod;
 
 	protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
@@ -138,46 +138,17 @@ public class BuildElementMethodImplementation : MethodImplementation
 		{
 			objCell.Add("enabled", false);
 		}
-		// objCell.Add("helpText", "blah blah");
 
-		if (oms.IsInstanceOf(ecInst, oms.GetInstance(KnownInstanceGuids.Classes.TextAttribute)))
+		string? helpText = oms.GetAttributeValue<string>(elementContent, oms.GetInstance(KnownAttributeGuids.Text.HelpText));
+		if (helpText != null)
 		{
-			objCell.Add("widget", "text");
+			objCell.Add("helpText", helpText);
-			if (targetInstance == InstanceHandle.Empty)
-			{
-				objCell.Add("value", oms.GetAttributeValue<string>(ecInst, oms.GetInstance(KnownAttributeGuids.Text.Value)));
-			}
-			else
-			{
-				objCell.Add("value", oms.GetAttributeValue<string>(targetInstance, ecInst));
-			}
 		}
-		else if (oms.IsInstanceOf(ecInst, oms.GetInstance(KnownInstanceGuids.Classes.BooleanAttribute)))
-		{
-			objCell.Add("widget", "checkBox");
-			objCell.Add("value", oms.GetAttributeValue<bool>(targetInstance, ecInst));
-			objCell.Add("text", oms.GetAttributeValue<bool>(targetInstance, ecInst) ? "Yes" : "No");
-		}
-		else if (oms.IsInstanceOf(ecInst, oms.GetInstance(KnownInstanceGuids.Classes.NumericAttribute)))
-		{
-			objCell.Add("widget", "number");
-			objCell.Add("value", oms.GetAttributeValue<decimal>(targetInstance, ecInst));
-			objCell.Add("text", oms.GetAttributeValue<decimal>(targetInstance, ecInst).ToString());
-			objCell.Add("precision", 6);
-			objCell.Add("format", "#0.######");
-		}
-		else if (oms.IsInstanceOf(ecInst, oms.GetInstance(KnownInstanceGuids.Classes.DateAttribute)))
-		{
-			objCell.Add("widget", "date");
 
-			DateTime dt = oms.GetAttributeValue<DateTime>(targetInstance, ecInst);
+		if (oms.IsInstanceOf(ecInst, oms.GetInstance(KnownInstanceGuids.Classes.Attribute)))
-			JsonObject objDate = new JsonObject();
+		{
-			objDate.Add("Y", dt.Year.ToString());
+			AttributeImplementation impl = oms.GetAttributeImplementation(ecInst);
-			objDate.Add("M", dt.Month.ToString().PadLeft(2, '0'));
+			impl.ExecuteBuildElement(oms, targetInstance, elementContent, ecInst, objCell);
-			objDate.Add("D", dt.Day.ToString().PadLeft(2, '0'));
-			objCell.Add("value", objDate);
-			objCell.Add("text", dt.ToString());
-			objCell.Add("dateTimePrecision", "DAY");
 		}
 		else
 		{

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/BuildUIResponseMethodImplementation.cs

@@ -21,7 +21,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class BuildUIResponseMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.BuildUIResponseMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.BuildUIResponseMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle irForClass = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Method__for__Class));
@@ -39,6 +39,7 @@ public class BuildUIResponseMethodImplementation : MethodImplementation
 			JsonObject objRoot = new JsonObject();
 			objRoot.Add("widget", "root");
 			objRoot.Add("body", objChild);
+			objRoot.Add("currentUser", CreateUserInfo(oms, oms.GetInstancesOf(oms.GetInstance(KnownInstanceGuids.Classes.User)).First()));
 
 			JsonObject objTitle = new JsonObject();
 			// task like 2501$6 (View Organization) has EC which has display option `Display as Page Title`, in which
@@ -61,6 +62,30 @@ public class BuildUIResponseMethodImplementation : MethodImplementation
 		return element;
 	}
 
+	private JsonNode? CreateUserInfo(Oms oms, InstanceHandle userInstance)
+	{
+		JsonObject objUser = new JsonObject();
+		objUser.Add("widget", "currentUser");
+		objUser.Add("iid", oms.GetInstanceKey(userInstance).ToString());
+		objUser.Add("label", oms.GetInstanceText(userInstance));
+
+		JsonObject objLink = new JsonObject();
+		objLink.Add("widget", "link");
+		objLink.Add("rel", "related-tasks");
+		objLink.Add("uri", String.Format("/{0}/inst/{1}/rel-tasks", oms.GetTenantName(oms.CurrentTenant), oms.GetInstanceKey(userInstance).ToString()));
+		objLink.Add("pv", true);
+		objLink.Add("rt", true);
+		objUser.Add("relatedTasksLink", objLink);
+
+		objLink = new JsonObject();
+		objLink.Add("widget", "link");
+		objLink.Add("rel", "self");
+		objLink.Add("uri", String.Format("/{0}/inst/{1}/{2}", oms.GetTenantName(oms.CurrentTenant), "1$37", oms.GetInstanceKey(userInstance).ToString()));
+		objLink.Add("v", true);
+		objUser.Add("selfLink", objLink);
+		return objUser;
+	}
+
 	private JsonObject CreateMoniker(Oms oms, InstanceHandle inst)
 	{
 		JsonObject obj = new JsonObject();

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/CalculateNumericMethodImplementation.cs

@@ -23,7 +23,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class CalculateNumericMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.CalculateNumericMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.CalculateNumericMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle irForClass = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Method__for__Class));

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/ConditionalSelectAttributeMethodImplementation.cs

@@ -20,7 +20,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class ConditionalSelectAttributeMethodImplementation : MethodImplementation
 {
-	public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.ConditionalSelectAttributeMethod;
+	public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.ConditionalSelectAttributeMethod;
 
 	protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/ConditionalSelectFromInstanceSetMethodImplementation.cs

@@ -20,7 +20,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class ConditionalSelectFromInstanceSetMethodImplementation : MethodImplementation
 {
-	public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.ConditionalSelectFromInstanceSetMethod;
+	public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.ConditionalSelectFromInstanceSetMethod;
 
 	protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/EvaluateBooleanExpressionMethodImplementation.cs

@@ -23,7 +23,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class EvaluateBooleanExpressionMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.EvaluateBooleanExpressionMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.EvaluateBooleanExpressionMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle c_Class = oms.GetInstance(KnownInstanceGuids.Classes.Class);

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/GetAttributeBySystemRoutineMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class GetAttributeBySystemRoutineMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.GetAttributeBySystemRoutineMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.GetAttributeBySystemRoutineMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle irForClass = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Method__for__Class));

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/GetAttributeMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class GetAttributeMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.GetAttributeMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.GetAttributeMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
     {
 		InstanceHandle irForClass = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Method__for__Class));

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/GetInstanceSetBySystemRoutineMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class GetInstanceSetBySystemRoutineMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.GetInstanceSetBySystemRoutineMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.GetInstanceSetBySystemRoutineMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle irForClass = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Method__for__Class));

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/GetInstancesMethodImplementation.cs

@@ -20,7 +20,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class GetInstancesMethodImplementation : MethodImplementation
 {
-	public override Guid MethodClassGuid => new Guid("{0a379314-9d0f-432d-ae59-63194ab32dd3}");
+	public override Guid ClassGuid => new Guid("{0a379314-9d0f-432d-ae59-63194ab32dd3}");
 
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
     {

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/GetReferencedAttributeMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class GetReferencedAttributeMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.GetReferencedAttributeMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.GetReferencedAttributeMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		Guid methodId = oms.GetGlobalIdentifier(method); 

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/GetReferencedInstanceSetMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class GetReferencedInstanceSetMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.GetReferencedInstanceSetMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.GetReferencedInstanceSetMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		Guid methodId = oms.GetGlobalIdentifier(method); 

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/GetRelationshipMethodImplementation.cs

@@ -21,7 +21,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class GetRelationshipMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.GetRelationshipMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.GetRelationshipMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		Guid methodId = oms.GetGlobalIdentifier(method); 

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/GetSpecifiedInstancesMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class GetSpecifiedInstancesMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.GetSpecifiedInstancesMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.GetSpecifiedInstancesMethod;
 	
 
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/InstanceOpMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class InstanceOpMethodImplementation : MethodImplementation
 {
-	public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.InstanceOpMethod;
+	public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.InstanceOpMethod;
 	protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle op = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Op_Scope__invokes__Instance_Op));

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/InvokeWebServiceMethodImplementation.cs

@@ -21,7 +21,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class InvokeWebServiceMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.InvokeWebServiceMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.InvokeWebServiceMethod;
 	
 
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/ProcessRelatedUpdatesMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class ProcessRelatedUpdatesMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.ProcessRelatedUpdatesMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.ProcessRelatedUpdatesMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle forClass = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Method__for__Class));

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/ProcessUpdatesMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class ProcessUpdatesMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.ProcessUpdatesMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.ProcessUpdatesMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle forClass = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Method__for__Class));

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/SelectFromInstanceSetMethodImplementation.cs

@@ -30,7 +30,7 @@ public class SelectFromInstanceSetMethodImplementation : MethodImplementation
 		public T Data;
 	}
 
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.SelectFromInstanceSetMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.SelectFromInstanceSetMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		//! FIXME !

mocha-dotnet/src/lib/Mocha.Core/MethodImplementations/UpdateBySystemRoutineMethodImplementation.cs

@@ -19,7 +19,7 @@ namespace Mocha.Core.MethodImplementations;
 
 public class UpdateBySystemRoutineMethodImplementation : MethodImplementation
 {
-    public override Guid MethodClassGuid => KnownInstanceGuids.MethodClasses.UpdateBySystemRoutineMethod;
+    public override Guid ClassGuid => KnownInstanceGuids.MethodClasses.UpdateBySystemRoutineMethod;
     protected override InstanceHandle ExecuteInternal(Oms oms, OmsContext context, InstanceHandle method)
 	{
 		InstanceHandle irForClass = oms.GetRelatedInstance(method, oms.GetInstance(KnownRelationshipGuids.Method__for__Class));

mocha-dotnet/src/lib/Mocha.Core/Oms.cs

@@ -55,7 +55,13 @@ public abstract class Oms
 		MethodImplementation[] methodImplementations = MBS.Core.Reflection.TypeLoader.GetAvailableTypes<MethodImplementation>(new System.Reflection.Assembly[] { Assembly.GetExecutingAssembly() });
 		foreach (MethodImplementation impl in methodImplementations)
 		{
-			RegisterMethodImplementation(impl.MethodClassGuid, impl);
+			ClassImplementations.Register(impl.ClassGuid, impl);
+		}
+		
+		AttributeImplementation[] attributeImplementations = MBS.Core.Reflection.TypeLoader.GetAvailableTypes<AttributeImplementation>(new System.Reflection.Assembly[] { Assembly.GetExecutingAssembly() });
+		foreach (AttributeImplementation impl in attributeImplementations)
+		{
+			ClassImplementations.Register(impl.ClassGuid, impl);
 		}
 	}
 
@@ -902,7 +908,11 @@ public abstract class Oms
 		}
 	}
 
-	private void ValidateConstraintsForAttribute(InstanceHandle source, InstanceHandle attribute, object value)
+	public void ValidateConstraintsForAttribute(InstanceHandle attribute, object value)
+	{
+		ValidateConstraintsForAttribute(InstanceHandle.Empty, attribute, value);
+	}
+	public void ValidateConstraintsForAttribute(InstanceHandle source, InstanceHandle attribute, object value)
 	{
 		if (!ValidateConstraints)
 			return;
@@ -918,11 +928,10 @@ public abstract class Oms
 		InstanceHandle a_NumericAttribute = GetInstance(KnownInstanceGuids.Classes.NumericAttribute);
 		InstanceHandle a_DateAttribute = GetInstance(KnownInstanceGuids.Classes.DateAttribute);
 
-		InstanceHandle sourceParentClass = GetParentClass(source);
-
 		bool Verify_Classes_Contain_Attributes = false;
-		if (Verify_Classes_Contain_Attributes)
+		if (Verify_Classes_Contain_Attributes && source != InstanceHandle.Empty)
 		{
+			InstanceHandle sourceParentClass = GetParentClass(source);
 			if (!RecursiveClassHasAttribute(sourceParentClass, attribute))
 			{
 				string name = GetAttributeValue<string>(attribute, GetInstance(KnownAttributeGuids.Text.Name));
@@ -931,53 +940,14 @@ public abstract class Oms
 			}
 		}
 
-		if (IsInstanceOf(attribute, a_TextAttribute))
+		Guid parentClassGuid = GetGlobalIdentifier(GetParentClass(attribute));
+		IEnumerable<AttributeImplementation> attrs = ClassImplementations.GetAll<AttributeImplementation>();
+		foreach (AttributeImplementation impl in attrs)
 		{
-			if (!(value is string))
+			if (impl.ClassGuid == parentClassGuid)
 			{
-				throw new ArgumentException("value for TextAttribute must be System.String");
+				impl.Validate(this, attribute, value);
-			}
+				// throw new ArgumentException(String.Format("value {0} cannot be converted to a `{1}`", value is string ? "\"" + value + "\"" : value, Oms.GetInstanceText(Oms.GetParentClass(parm))), nameof(value));
-			if (TryGetAttributeValue(attribute, GetInstance(KnownAttributeGuids.Numeric.MinimumLength), out decimal minimumLength))
-			{
-				if (((string)value).Length < minimumLength)
-				{
-					throw new ArgumentOutOfRangeException(String.Format("value for TextAttribute must be greater than {0} characters", minimumLength - 1));
-				}
-			}
-			if (TryGetAttributeValue(attribute, GetInstance(KnownAttributeGuids.Numeric.MaximumLength), out decimal maximumLength))
-			{
-				if (((string)value).Length > maximumLength)
-				{
-					throw new ArgumentOutOfRangeException(String.Format("value for TextAttribute must be less than {0} characters", maximumLength + 1));
-				}
-			}
-		}
-		else if (IsInstanceOf(attribute, a_BooleanAttribute))
-		{
-			if (!(value is bool))
-			{
-				throw new ArgumentException("value for BooleanAttribute must be System.Boolean");
-			}
-		}
-		else if (IsInstanceOf(attribute, a_NumericAttribute))
-		{
-			if (!(value is decimal))
-			{
-				throw new ArgumentException("value for NumericAttribute must be System.Decimal");
-			}
-			if (TryGetAttributeValue(attribute, GetInstance(KnownAttributeGuids.Numeric.MinimumValue), out decimal minimumValue))
-			{
-				if (((decimal)value) < minimumValue)
-				{
-					throw new ArgumentOutOfRangeException(String.Format("value for NumericAttribute must be greater than {0}", minimumValue - 1));
-				}
-			}
-			if (TryGetAttributeValue(attribute, GetInstance(KnownAttributeGuids.Numeric.MaximumValue), out decimal maximumValue))
-			{
-				if (((decimal)value) > maximumValue)
-				{
-					throw new ArgumentOutOfRangeException(String.Format("value for NumericAttribute must be greater than {0}", maximumValue - 1));
-				}
 			}
 		}
 	}
@@ -995,14 +965,14 @@ public abstract class Oms
 			IReadOnlyCollection<InstanceHandle> superclasses = GetRelatedInstances(sourceParentClass, GetInstance(KnownRelationshipGuids.Class__has_super__Class));
 			if (superclasses != null)
 			{
-			foreach (InstanceHandle ir in superclasses)
+				foreach (InstanceHandle ir in superclasses)
-			{
-				if (RecursiveClassHasAttribute(ir, attribute))
 				{
-					return true;
+					if (RecursiveClassHasAttribute(ir, attribute))
+					{
+						return true;
+					}
 				}
 			}
-			}
 		}
 		return false;
 	}
@@ -1213,11 +1183,7 @@ public abstract class Oms
 		return value;
 	}
 
-	private Dictionary<Guid, MethodImplementation> methodImplementations = new Dictionary<Guid, MethodImplementation>();
+	public ClassImplementationRegistry ClassImplementations { get; } = new ClassImplementationRegistry();
-	private void RegisterMethodImplementation(Guid methodClassId, MethodImplementation implementation)
-	{
-		methodImplementations[methodClassId] = implementation;
-	}
 
 	public InstanceHandle Execute(OmsContext context, MethodBinding methodBinding, IInstanceReference? targetInstance = null)
 	{
@@ -1303,32 +1269,7 @@ public abstract class Oms
 		*/
 		{
 			IEnumerable<InstanceHandle> parameterAssignments = GetRelatedInstances(methodOrMethodBinding, GetInstance(KnownRelationshipGuids.Method_Binding__has__Parameter_Assignment));
-			foreach (InstanceHandle parm in parameterAssignments)
+			AssignParameters(context, parameterAssignments);
-			{
-				InstanceHandle assignsToParm = GetRelatedInstance(parm, GetInstance(KnownRelationshipGuids.Parameter_Assignment__assigns_to__Work_Data));
-
-				IInstanceReference assignsFromWorkData = GetRelatedInstance(parm, GetInstance(KnownRelationshipGuids.Parameter_Assignment__assigns_from__Executable_returning_Work_Data));
-				if (assignsFromWorkData == null)
-				{
-					Console.Error.WriteLine("oms: error: assigns from work data not set for parameter assignment '{0}'", parm.GlobalIdentifier);
-					continue;
-				}
-				
-				if (IsInstanceOf(assignsFromWorkData, GetInstance(KnownInstanceGuids.Classes.Class)))
-				{
-					assignsFromWorkData = context.GetWorkData<IInstanceReference>(assignsFromWorkData);
-				}
-
-				if (IsInstanceOf(assignsFromWorkData, GetInstance(KnownInstanceGuids.Classes.WorkSet)))
-				{
-					bool evaluateWorkSet = GetAttributeValue<bool>(parm, GetInstance(KnownAttributeGuids.Boolean.EvaluateWorkSet));
-					if (evaluateWorkSet)
-					{
-						assignsFromWorkData = context.GetWorkData<InstanceHandle>(assignsFromWorkData);
-					}
-				}
-				context.SetWorkData(assignsToParm, assignsFromWorkData);
-			}
 
 			InstanceHandle relatedMethod = GetRelatedInstance(methodOrMethodBinding, GetInstance<Relationship>(KnownRelationshipGuids.Method_Binding__executes__Method));
 			InstanceHandle relatedMethod_for_Class = GetRelatedInstance(relatedMethod, GetInstance<Relationship>(KnownRelationshipGuids.Method__for__Class));
@@ -1368,11 +1309,11 @@ public abstract class Oms
 		}
 		else
 		{
-			if (methodImplementations.ContainsKey(parentClassId))
+			if (ClassImplementations.TryGet<MethodImplementation>(parentClassId, out MethodImplementation? impl))
 			{
+				InstanceHandle forClass = GetRelatedInstance(methodOrMethodBinding, GetInstance(KnownRelationshipGuids.Method__for__Class));
 				if (targetInstance == null)
 				{
-					InstanceHandle forClass = GetRelatedInstance(methodOrMethodBinding, GetInstance(KnownRelationshipGuids.Method__for__Class));
 					if (forClass != InstanceHandle.Empty)
 					{
 						IInstanceReference? irTarget = context.GetWorkData<IInstanceReference?>(forClass);
@@ -1389,6 +1330,29 @@ public abstract class Oms
 					//sthrow new NullReferenceException(String.Format("Attempt to call instance method `{0}` without an instance", methodOrMethodBinding));
 				}
 
+				bool is_abstract = GetAttributeValue<bool>(methodOrMethodBinding, GetInstance(KnownAttributeGuids.Boolean.Abstract));
+				if (is_abstract)
+				{
+					InstanceHandle forClassInstance = context.GetWorkData<InstanceHandle>(forClass);
+					InstanceHandle parentClass2 = GetParentClass(forClassInstance);
+					string parentClassName = GetAttributeValue<string>(parentClass2, GetInstance(KnownAttributeGuids.Text.Name));
+
+					IEnumerable<InstanceHandle> methodsImplementingMethod = GetRelatedInstances(methodOrMethodBinding, GetInstance(KnownRelationshipGuids.Method__implemented_by__Method));
+					foreach (InstanceHandle ih in methodsImplementingMethod)
+					{
+						InstanceHandle forClassInstance2 = GetRelatedInstance(ih, GetInstance(KnownRelationshipGuids.Method__for__Class));
+						if (parentClass2 == forClassInstance2)
+						{
+							// call implementing method instead
+							retval = Execute(context, ih, targetInstance);
+							if (retval != InstanceHandle.Empty)
+							{
+								return retval.GetValueOrDefault();
+							}
+						}
+					}
+					throw new InvalidOperationException(String.Format("No method implementation for abstract method {0} on class {1} ({2})", GetInstanceKey(methodOrMethodBinding), parentClassName.Replace(' ', '_') + "--IS", GetInstanceKey(parentClass2)));
+				}
 				if (targetInstance == null)
 				{
 
@@ -1423,15 +1387,14 @@ public abstract class Oms
 					InstanceHandle pclassInstance = GetParentClass(hh);
 					context.SetWorkData(pclassInstance, hh);
 				}
-				retval = methodImplementations[parentClassId].Execute(this, context, methodOrMethodBinding);
+				retval = impl.Execute(this, context, methodOrMethodBinding);
+			}
+			else
+			{
+				throw new NotImplementedException(String.Format("method implementation not found for method class {0}", GetGlobalIdentifier(parentClass)));
 			}
 		}
-		if (retval == null)
+		if (retval != null)
-		{
-			// return InstanceHandle.Empty;
-			throw new NotImplementedException(String.Format("method implementation not found for method class {0}", GetGlobalIdentifier(parentClass)));
-		}
-		else
 		{
 			// context.StackTrace.Pop();
 			IDictionary<InstanceHandle, object?> dict = context.GetAllWorkData();
@@ -1443,6 +1406,62 @@ public abstract class Oms
 			}
 			return retval.Value;
 		}
+		else
+		{
+			// return InstanceHandle.Empty;
+			throw new InvalidOperationException(String.Format("method did not return work data for method class {0}", GetGlobalIdentifier(parentClass)));
+		}
+	}
+
+	private void AssignParameters(OmsContext context, IEnumerable<InstanceHandle> parameterAssignments)
+	{
+		foreach (InstanceHandle parm in parameterAssignments)
+		{
+			InstanceHandle assignsToParm = GetRelatedInstance(parm, GetInstance(KnownRelationshipGuids.Parameter_Assignment__assigns_to__Work_Data));
+			IInstanceReference assignsFromWorkData = GetRelatedInstance(parm, GetInstance(KnownRelationshipGuids.Parameter_Assignment__assigns_from__Executable_returning_Work_Data));
+
+			if (assignsFromWorkData == null)
+			{
+				Console.Error.WriteLine("oms: error: assigns from work data not set for parameter assignment '{0}'", parm.GlobalIdentifier);
+				continue;
+			}
+
+			// there are several possibilities:
+			
+			// `assigns to Parm` is a Class which is an Attribute. `assigns from Work Data` is an Attribute.
+			// in this case, we should set the work data to the value of the work data pointed to by `assigns from`
+			// `Token` := `User Name` 	-> 		`Token` = "testinguser"
+			//
+			// `assigns to Parm` is a Class. `assigns from Work Data` is a Class which is NOT an Attribute.
+			// just use the ref as-is
+			// `System User` := `User`	->	 `System User` = `User`
+			//
+			// `Worker who can Resign` := `Current Signed In Worker`	-> 		`Worker who can Resign` = `Steve`
+
+
+			if (IsInstanceOf(assignsToParm, GetInstance(KnownInstanceGuids.Classes.Attribute)) && IsInstanceOf(assignsFromWorkData, GetInstance(KnownInstanceGuids.Classes.Attribute)))
+			{
+				// if `assigns to Parm` is a Class which inherits from Attribute, and `assigns from Work Data` is an Attribute, then assign the underlying work data
+				context.SetWorkData(assignsToParm, context.GetWorkData(assignsFromWorkData));
+			}
+			else
+			{
+				if (IsInstanceOf(assignsFromWorkData, GetInstance(KnownInstanceGuids.Classes.Class)))
+				{
+					assignsFromWorkData = context.GetWorkData<IInstanceReference>(assignsFromWorkData);
+				}
+
+				if (IsInstanceOf(assignsFromWorkData, GetInstance(KnownInstanceGuids.Classes.WorkSet)))
+				{
+					bool evaluateWorkSet = GetAttributeValue<bool>(parm, GetInstance(KnownAttributeGuids.Boolean.EvaluateWorkSet));
+					if (evaluateWorkSet)
+					{
+						assignsFromWorkData = context.GetWorkData<InstanceHandle>(assignsFromWorkData);
+					}
+				}
+				context.SetWorkData(assignsToParm, assignsFromWorkData);
+			}
+		}
 	}
 
 	private InstanceHandle ExecuteMethodBinding(OmsContext context, InstanceHandle methodBinding, IInstanceReference? targetInstance = null)
@@ -2768,4 +2787,18 @@ public abstract class Oms
 		}
 		return InstanceHandle.Empty;
     }
+
+	public AttributeImplementation GetAttributeImplementation(InstanceHandle att)
+	{
+		InstanceHandle parentClass = GetParentClass(att);
+		Guid classGuid = GetGlobalIdentifier(parentClass);
+
+		// find AttributeImplementation whose ClassGuid matches
+		return ClassImplementations.Get<AttributeImplementation>(classGuid);
+	}
+
+	public InstanceHandle GetInstance(object method__implements__Method)
+	{
+		throw new NotImplementedException();
+	}
 }

mocha-dotnet/src/lib/Mocha.Core/OmsContext.cs

@@ -137,6 +137,60 @@ public class OmsContext
 		return defaultValue;
 	}
 
+	private void ValidateSubclassConstraints(InstanceHandle parm, System.Collections.IEnumerable en)
+	{
+		bool singular = false;
+		if (!Oms.TryGetAttributeValue<bool>(parm, Oms.GetInstance(KnownAttributeGuids.Boolean.Singular), out singular))
+		{
+			singular = false;
+		}
+		bool includeSubclasses = false;
+		if (!Oms.TryGetAttributeValue<bool>(parm, Oms.GetInstance(KnownAttributeGuids.Boolean.IncludeSubclasses), out includeSubclasses))
+		{
+			includeSubclasses = false;
+		}
+
+		int ct = 0;
+		foreach (object o in en)
+		{
+			ct++;
+		}
+
+		if (singular && ct > 1)
+		{
+			throw new InvalidOperationException("cannot assign multiple instances to a singular Work Set");
+		}
+
+		foreach (object o in en)
+		{
+			if (o is IInstanceReference ir)
+			{
+				IReadOnlyCollection<InstanceHandle> irs = Oms.GetRelatedInstances(parm, Oms.GetInstance(KnownRelationshipGuids.Work_Set__has_valid__Class));
+				if (irs.Count > 0)
+				{
+					if (includeSubclasses)
+					{
+						foreach (InstanceHandle possibleParentClass in irs)
+						{
+							if (!Oms.IsInstanceOf(ir, possibleParentClass))
+							{
+								throw new ArgumentException("instance reference must be an instance of appropriate class");
+							}
+						}
+					}
+					else
+					{
+						InstanceHandle parentClass = Oms.GetParentClass(ir);
+						if (!irs.Contains(parentClass))
+						{
+							throw new ArgumentException("instance reference must be an instance of appropriate class");
+						}
+					}
+				}
+			}
+		}
+	}
+
 	public void SetWorkData(IInstanceReference parm, object? value)
 	{
 		SetWorkData(parm.GetHandle(), value);
@@ -147,75 +201,31 @@ public class OmsContext
 		{
 			if (Oms.IsInstanceOf(parm, Oms.GetInstance(KnownInstanceGuids.Classes.WorkSet)))
 			{
-				bool singular = false;
-				if (!Oms.TryGetAttributeValue<bool>(parm, Oms.GetInstance(KnownAttributeGuids.Boolean.Singular), out singular))
-				{
-					singular = false;
-				}
-
 				if (value is IInstanceReference)
 				{
-					IReadOnlyCollection<InstanceHandle> irs = Oms.GetRelatedInstances(parm, Oms.GetInstance(KnownRelationshipGuids.Work_Set__has_valid__Class));
+					ValidateSubclassConstraints(parm, new IInstanceReference[] { (IInstanceReference)value });
-					if (irs.Count > 0)
-					{
-						InstanceHandle ir = ((IInstanceReference)value).GetHandle();
-						InstanceHandle parentClass = Oms.GetParentClass(ir);
-						if (!irs.Contains(parentClass))
-						{
-							throw new ArgumentException("instance reference must be an instance of appropriate class");
-						}
-					}
 				}
 				else if (value is IEnumerable<InstanceHandle>)
 				{
-					IEnumerable<InstanceHandle> insts = (IEnumerable<InstanceHandle>)value;
+					ValidateSubclassConstraints(parm, (IEnumerable<InstanceHandle>)value);
-					if (singular && insts.Count() > 1)
-					{
-						throw new InvalidOperationException("Singular Work Set must only contain a single InstanceReference or be an array of InstanceReference that contains exactly zero or one item.");
-					}
-					IEnumerable<InstanceHandle> irs = Oms.GetRelatedInstances(parm, Oms.GetInstance(KnownRelationshipGuids.Work_Set__has_valid__Class));
-					if (irs.Count() > 0)
-					{
-						foreach (InstanceHandle ir in insts)
-						{
-							InstanceHandle parentClass = Oms.GetParentClass(ir);
-							if (!irs.Contains(parentClass))
-							{
-								throw new ArgumentException("instance reference must be an instance of appropriate class");
-							}
-						}
-					}
-					// value = ((IEnumerable<InstanceHandle>)value).FirstOrDefault();
 				}
 				else if (value is IEnumerable<InstanceWrapper>)
 				{
-					IEnumerable<InstanceWrapper> insts = (IEnumerable<InstanceWrapper>)value;
+					ValidateSubclassConstraints(parm, (IEnumerable<InstanceWrapper>)value);
-					if (singular && insts.Count() > 1)
+				}
-					{
+				else if (value is IEnumerable<IInstanceReference>)
-						throw new InvalidOperationException("Singular Work Set must only contain a single InstanceReference or be an array of InstanceReference that contains exactly zero or one item.");
+				{
-					}
+					ValidateSubclassConstraints(parm, (IEnumerable<IInstanceReference>)value);
-					IEnumerable<InstanceHandle> irs = Oms.GetRelatedInstances(parm, Oms.GetInstance(KnownRelationshipGuids.Work_Set__has_valid__Class));
-					if (irs != null)
-					{
-						if (irs.Count() > 0)
-						{
-							foreach (InstanceWrapper iw in insts)
-							{
-								InstanceHandle ir = iw.GetHandle();
-								InstanceHandle parentClass = Oms.GetParentClass(ir);
-								if (!irs.Contains(parentClass))
-								{
-									throw new ArgumentException("instance reference must be an instance of appropriate class");
-								}
-							}
-						}
-					}
 				}
 				else
 				{
 					throw new ArgumentException(String.Format("cannot assign literal data '{0}' to a Work Set", value));
 				}
 			}
+			else
+			{
+				Oms.ValidateConstraintsForAttribute(parm, value);
+			}
 		}
 		_WorkData[parm] = value;
 	}

mocha-dotnet/src/lib/Mocha.Core/OmsMethodBuilder.cs

@@ -25,7 +25,7 @@ namespace Mocha.Core;
 
 public class OmsMethodBuilder
 {
-	private InstanceHandle c_ReturnAttributeMethodBinding, c_ReturnInstanceSetMethodBinding, c_ReturnElementMethodBinding, c_BuildResponseMethodBinding;
+	private InstanceHandle c_ReturnAttributeMethodBinding, c_ReturnInstanceSetMethodBinding, c_ReturnElementMethodBinding, c_BuildResponseMethodBinding, c_ExecuteUpdateMethodBinding, c_ProcessUpdatesMethodBinding;
 
 	public Oms Oms { get; }
 	public OmsMethodBuilder(Oms oms)
@@ -35,38 +35,68 @@ public class OmsMethodBuilder
 		c_ReturnAttributeMethodBinding = Oms.GetInstance(KnownInstanceGuids.Classes.ReturnAttributeMethodBinding);
 		c_ReturnInstanceSetMethodBinding = Oms.GetInstance(KnownInstanceGuids.Classes.ReturnInstanceSetMethodBinding);
 		c_ReturnElementMethodBinding = Oms.GetInstance(KnownInstanceGuids.Classes.ReturnElementMethodBinding);
+		c_BuildResponseMethodBinding = Oms.GetInstance(KnownInstanceGuids.Classes.BuildResponseMethodBinding);
+		c_ExecuteUpdateMethodBinding = Oms.GetInstance(KnownInstanceGuids.Classes.ExecuteUpdateMethodBinding);
+		c_ProcessUpdatesMethodBinding = Oms.GetInstance(KnownInstanceGuids.Classes.ProcessUpdatesMethodBinding);
 	}
 
-	public ReturnAttributeMethodBinding CreateReturnAttributeMethodBinding(MethodReturningAttribute method)
+	private InstanceHandle CreateMethodBindingBase(InstanceHandle parentClass, Method method, IEnumerable<KeyValuePair<InstanceHandle, InstanceHandle>>? parameterAssignments)
 	{
-		InstanceHandle methodBinding = Oms.CreateInstanceOf(c_ReturnAttributeMethodBinding);
+		InstanceHandle methodBinding = Oms.CreateInstanceOf(parentClass);
 		Oms.AssignRelationship(methodBinding, Oms.GetInstance(KnownRelationshipGuids.Method_Binding__executes__Method), method.GetHandle());
+		if (parameterAssignments != null)
+		{
+			CreateParameterAssignments(methodBinding, parameterAssignments);
+		}
+		return methodBinding;
+	}
+
+	private void CreateParameterAssignments(InstanceHandle methodBinding, IEnumerable<KeyValuePair<InstanceHandle, InstanceHandle>> parameterAssignments)
+	{
+		List<InstanceHandle> parmAssignments = new List<InstanceHandle>();
+		foreach (KeyValuePair<InstanceHandle, InstanceHandle> kvp in parameterAssignments)
+		{
+			InstanceHandle parmAssignment = Oms.CreateInstanceOf(Oms.GetInstance(KnownInstanceGuids.Classes.ParameterAssignment));
+			Oms.AssignRelationship(parmAssignment, Oms.GetInstance(KnownRelationshipGuids.Parameter_Assignment__assigns_to__Work_Data), kvp.Key);
+			Oms.AssignRelationship(parmAssignment, Oms.GetInstance(KnownRelationshipGuids.Parameter_Assignment__assigns_from__Executable_returning_Work_Data), kvp.Value);
+			parmAssignments.Add(parmAssignment);
+		}
+		Oms.AssignRelationship(methodBinding, Oms.GetInstance(KnownRelationshipGuids.Method_Binding__has__Parameter_Assignment), parmAssignments);
+	}
+
+	public ReturnAttributeMethodBinding CreateReturnAttributeMethodBinding(MethodReturningAttribute method, IEnumerable<KeyValuePair<InstanceHandle, InstanceHandle>>? parameterAssignments = null)
+	{
+		InstanceHandle methodBinding = CreateMethodBindingBase(c_ReturnAttributeMethodBinding, method, parameterAssignments);
 		return new ReturnAttributeMethodBinding(methodBinding);
 	}
-	public ReturnInstanceSetMethodBinding CreateReturnInstanceSetMethodBinding(MethodReturningInstanceSet method)
+	public ReturnInstanceSetMethodBinding CreateReturnInstanceSetMethodBinding(MethodReturningInstanceSet method, IEnumerable<KeyValuePair<InstanceHandle, InstanceHandle>>? parameterAssignments = null)
 	{
-		InstanceHandle methodBinding = Oms.CreateInstanceOf(c_ReturnInstanceSetMethodBinding);
+		InstanceHandle methodBinding = CreateMethodBindingBase(c_ReturnInstanceSetMethodBinding, method, parameterAssignments);
-		Oms.AssignRelationship(methodBinding, Oms.GetInstance(KnownRelationshipGuids.Method_Binding__executes__Method), method.GetHandle());
 		return new ReturnInstanceSetMethodBinding(methodBinding);
 	}
-    public ReturnElementMethodBinding CreateReturnElementMethodBinding(MethodReturningElement method)
+    public ReturnElementMethodBinding CreateReturnElementMethodBinding(MethodReturningElement method, IEnumerable<KeyValuePair<InstanceHandle, InstanceHandle>>? parameterAssignments = null)
     {
-		InstanceHandle methodBinding = Oms.CreateInstanceOf(c_ReturnElementMethodBinding);
+		InstanceHandle methodBinding = CreateMethodBindingBase(c_ReturnElementMethodBinding, method, parameterAssignments);
-		Oms.AssignRelationship(methodBinding, Oms.GetInstance(KnownRelationshipGuids.Method_Binding__executes__Method), method.GetHandle());
 		return new ReturnElementMethodBinding(methodBinding);
     }
-	public BuildResponseMethodBinding CreateBuildResponseMethodBinding(MethodBuildingResponse method)
+	public BuildResponseMethodBinding CreateBuildResponseMethodBinding(MethodBuildingResponse method, IEnumerable<KeyValuePair<InstanceHandle, InstanceHandle>>? parameterAssignments = null)
 	{
-		if (c_BuildResponseMethodBinding == InstanceHandle.Empty)
+		InstanceHandle methodBinding = CreateMethodBindingBase(c_BuildResponseMethodBinding, method, parameterAssignments);
-		{
-			c_BuildResponseMethodBinding = Oms.GetInstance(KnownInstanceGuids.Classes.BuildResponseMethodBinding);
-		}
-		
-		InstanceHandle methodBinding = Oms.CreateInstanceOf(c_BuildResponseMethodBinding);
-		Oms.AssignRelationship(methodBinding, Oms.GetInstance(KnownRelationshipGuids.Method_Binding__executes__Method), method.GetHandle());
 		return new BuildResponseMethodBinding(methodBinding);
 	}
 
+	public ExecuteUpdateMethodBinding CreateExecuteUpdateMethodBinding(Method method, IEnumerable<KeyValuePair<InstanceHandle, InstanceHandle>>? parameterAssignments = null)
+	{
+		InstanceHandle methodBinding = CreateMethodBindingBase(c_ExecuteUpdateMethodBinding, method, parameterAssignments);
+		return new ExecuteUpdateMethodBinding(methodBinding);
+	}
+
+	public ExecuteUpdateMethodBinding CreateProcessUpdatesMethodBinding(Method method, IEnumerable<KeyValuePair<InstanceHandle, InstanceHandle>>? parameterAssignments = null)
+	{
+		InstanceHandle methodBinding = CreateMethodBindingBase(c_ProcessUpdatesMethodBinding, method, parameterAssignments);
+		return new ExecuteUpdateMethodBinding(methodBinding);
+	}
+
 	public GetAttributeMethod CreateGetAttributeMethod(IInstanceReference forClassInstance, string verb, string name, InstanceHandle attributeInstance)
 	{
 		return CreateGetAttributeMethod(forClassInstance, verb, name, null, false, attributeInstance);
@@ -458,4 +488,28 @@ public class OmsMethodBuilder
 		}
 		return new InvokeWebServiceMethod(ih);
 	}
+
+	public PUMProcess CreatePUMProcess(IEnumerable<ExecuteUpdateMethodBinding> executeUpdateMethodBindings)
+	{
+		InstanceHandle ih = Oms.CreateInstanceOf(Oms.GetInstance(KnownInstanceGuids.Classes.PUMProcess));
+		List<InstanceHandle> list = new List<InstanceHandle>();
+		foreach (ExecuteUpdateMethodBinding eumb in executeUpdateMethodBindings)
+		{
+			list.Add(eumb.GetHandle());
+		}
+		Oms.AssignRelationship(ih, Oms.GetInstance(KnownRelationshipGuids.PUM_Process__invokes__Execute_Update_Method_Binding), list);
+		return new PUMProcess(ih);
+	}
+
+	public ProcessUpdatesMethod CreateProcessUpdatesMethod(IInstanceReference forClassInstance, string verb, string name, AccessModifier accessModifier, bool isStatic, IEnumerable<ExecuteUpdateMethodBinding> executeUpdateMethodBindings)
+	{
+		PUMProcess pumProcess = CreatePUMProcess(executeUpdateMethodBindings);
+		return CreateProcessUpdatesMethod(forClassInstance, verb, name, accessModifier, isStatic, pumProcess);
+	}
+	public ProcessUpdatesMethod CreateProcessUpdatesMethod(IInstanceReference forClassInstance, string verb, string name, AccessModifier accessModifier, bool isStatic, PUMProcess pumProcess)
+	{
+		InstanceHandle ih = CreateMethodBase(Oms.GetInstance(KnownInstanceGuids.MethodClasses.ProcessUpdatesMethod), forClassInstance, verb, name, accessModifier, isStatic);
+		Oms.AssignRelationship(ih, Oms.GetInstance(KnownRelationshipGuids.Process_Updates_Method__has__PUM_Process), pumProcess);
+		return new ProcessUpdatesMethod(ih);
+	}
 }

mocha-dotnet/src/lib/Mocha.Core/Oop/MethodBinding.cs

@@ -42,3 +42,8 @@ public class BuildResponseMethodBinding : MethodBinding //, IExecutableBuildingR
 	public override Guid ClassId => KnownInstanceGuids.Classes.BuildResponseMethodBinding;
 	internal BuildResponseMethodBinding(InstanceHandle handle) : base(handle) { }
 }
+public class ExecuteUpdateMethodBinding : MethodBinding //, IExecutableBuildingResponse
+{
+	public override Guid ClassId => KnownInstanceGuids.Classes.ExecuteUpdateMethodBinding;
+	internal ExecuteUpdateMethodBinding(InstanceHandle handle) : base(handle) { }
+}

mocha-dotnet/src/lib/Mocha.Core/Oop/Methods/ProcessRelatedUpdatesMethod.cs

@@ -0,0 +1,25 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+
+namespace Mocha.Core.Oop.Methods;
+
+public class ProcessRelatedUpdatesMethod : Method
+{
+    public override Guid ClassId => KnownInstanceGuids.MethodClasses.ProcessRelatedUpdatesMethod;
+    internal ProcessRelatedUpdatesMethod(InstanceHandle handle) : base(handle) { }
+}

mocha-dotnet/src/lib/Mocha.Core/Oop/Methods/ProcessUpdatesMethod.cs

@@ -0,0 +1,25 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+
+namespace Mocha.Core.Oop.Methods;
+
+public class ProcessUpdatesMethod : Method
+{
+    public override Guid ClassId => KnownInstanceGuids.MethodClasses.ProcessUpdatesMethod;
+    internal ProcessUpdatesMethod(InstanceHandle handle) : base(handle) { }
+}

mocha-dotnet/src/lib/Mocha.Core/Oop/PUMProcess.cs

@@ -0,0 +1,25 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+
+namespace Mocha.Core.Oop.Methods;
+
+public class PUMProcess : ConcreteInstanceWrapper
+{
+    public override Guid ClassId => KnownInstanceGuids.Classes.PUMProcess;
+    internal PUMProcess(InstanceHandle handle) : base(handle) { }
+}

mocha-dotnet/src/lib/Mocha.Modeling/CodeGeneration/Expressions/CreateInstance.cs

@@ -22,9 +22,12 @@ public class CreateInstance : IMethodMember
 	public ObjectReference ObjectReference { get; set; }
 	public List<object> ParameterValues { get; } = new List<object>();
 	
-	public CreateInstance(IEnumerable<string> objectNames, IEnumerable<object> parameterValues)
+	public CreateInstance(ObjectReference createWhat, IEnumerable<object>? parameterValues = null)
 	{
-		ObjectReference = new ObjectReference(objectNames);
+		ObjectReference = createWhat;
-		ParameterValues.AddRange(parameterValues);
+		if (parameterValues != null)
+		{
+			ParameterValues.AddRange(parameterValues);
+		}
 	}
 }

mocha-dotnet/src/lib/Mocha.Modeling/CodeGeneration/Expressions/MethodCall.cs

@@ -32,8 +32,7 @@ public class MethodCall : IMethodMember
 		{
 			foreach (object parmValue in parmValues)
 			{
-				MethodParameter parm = new MethodParameter();
+				MethodParameter parm = new MethodParameter(parmValue);
-				parm.Value = parmValue;
 				Parameters.Add(parm);
 			}
 		}

mocha-dotnet/src/lib/Mocha.Modeling/CodeGeneration/Expressions/MethodParameter.cs

@@ -19,13 +19,17 @@ namespace Mocha.Modeling.CodeGeneration;
 
 public class MethodParameter
 {
-	public MethodParameter(string? name = null, ObjectReference? dataType = null)
+	public MethodParameter(object value)
+	{
+		Value = value;
+	}
+	public MethodParameter(string name, ObjectReference dataType)
 	{
 		Name = name;
 		DataType = dataType;
 	}
 
-	public ObjectReference? DataType { get; set; } = null;
+	public ObjectReference DataType { get; set; } = null;
-	public string? Name { get; set; } = null;
+	public string Name { get; set; } = null;
 	public object? Value { get; set; } = null;
 }

mocha-dotnet/src/lib/Mocha.Modeling/CodeGeneration/Expressions/ObjectReference.cs

@@ -15,14 +15,31 @@
 // You should have received a copy of the GNU General Public License
 // along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
 
+using System.Text;
+
 namespace Mocha.Modeling.CodeGeneration;
 
 public class ObjectReference
 {
 	public IEnumerable<string> ObjectNames { get; set; } = null;
+	public IEnumerable<ObjectReference>? GenericArguments { get; set; } = null;
 
-	public ObjectReference(IEnumerable<string> objectNames)
+	public ObjectReference(IEnumerable<string> objectNames, IEnumerable<ObjectReference>? genericArguments = null)
 	{
 		ObjectNames = objectNames;
+		GenericArguments = genericArguments;
+	}
+
+	public override string ToString()
+	{
+		StringBuilder sb = new StringBuilder();
+		sb.Append(String.Join('.', ObjectNames));
+		if (GenericArguments != null && GenericArguments.Count() > 0)
+		{
+			sb.Append('<');
+			sb.Append(String.Join(',', GenericArguments));
+			sb.Append('>');
+		}
+		return sb.ToString();
 	}
 }

mocha-dotnet/src/lib/Mocha.Modeling/CodeGeneration/Field.cs

@@ -0,0 +1,34 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+namespace Mocha.Modeling.CodeGeneration;
+
+public class Field : IClassMember
+{
+	public Field(string name, ObjectReference returnType, object? value = null)
+	{
+		Name = name;
+		ReturnType = returnType;
+		Value = value;
+	}
+
+	public AccessModifier AccessModifier { get; set; } = AccessModifier.None;
+	public string Name { get; set; } = "";
+	public ObjectReference ReturnType { get; set; }
+	public object? Value { get; set; }
+	public bool ReadOnly { get; set; } = false;
+}

mocha-dotnet/src/lib/Mocha.Modeling/CodeGeneration/Generators/CSharpCodeGenerator.cs

@@ -47,7 +47,7 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 		if (item is Namespace ns)
 		{
 			sb.Append("namespace ");
-			sb.Append(BuildObjectReference(ns.Names));
+			sb.Append(BuildObjectReference(new ObjectReference(ns.Names)));
 			sb.Append(" { ");
 			foreach (ICodeItem subItem in ns.Items)
 			{
@@ -63,7 +63,7 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 			if (c.InheritsClass != null)
 			{
 				sb.Append(" : ");
-				sb.Append(BuildObjectReference(c.InheritsClass.ObjectNames));
+				sb.Append(BuildObjectReference(c.InheritsClass));
 			}
 			sb.Append(" { ");
 			foreach (IClassMember subItem in c.Items)
@@ -115,10 +115,35 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 			if (p.Value != null || (p.UseAutoProperty && p.ReadOnly))
 			{
 				sb.Append("= ");
-				sb.Append(ExpressionOrLiteral(p.Value));
+				if (p.Value != null)
+				{
+					sb.Append(ExpressionOrLiteral(p.Value));
+				}
+				else if (p.UseAutoProperty && p.GetMethod != null && p.GetMethod.Items.Count == 1 && p.GetMethod.Items[0] is Return r)
+				{
+					sb.Append(ExpressionOrLiteral(r.Value));
+				}
 				sb.Append(";");
 			}
 		}
+		else if (item is Field f)
+		{
+			sb.Append(GenerateCode(f.AccessModifier));
+			sb.Append(' ');
+			if (f.ReadOnly)
+			{
+				sb.Append("readonly ");
+			}
+			sb.Append(GenerateCode(f.ReturnType));
+			sb.Append(' ');
+			sb.Append(f.Name);
+			if (f.Value != null)
+			{
+				sb.Append(" = ");
+				sb.Append(ExpressionOrLiteral(f.Value));
+			}
+			sb.Append(";");
+		}
 		else if (item is Method m)
 		{
 			sb.Append(GenerateCode(m.AccessModifier));
@@ -144,7 +169,7 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 			for (int i = 0; i < m.Parameters.Count; i++)
 			{
 				MethodParameter parm = m.Parameters[i];
-				sb.Append(BuildObjectReference(parm.DataType.ObjectNames));
+				sb.Append(BuildObjectReference(parm.DataType));
 				sb.Append(' ');
 				sb.Append(parm.Name);
 				if (i < m.Parameters.Count - 1)
@@ -165,7 +190,7 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 		else if (item is CreateInstance ci)
 		{
 			sb.Append("new ");
-			sb.Append(BuildObjectReference(ci.ObjectReference.ObjectNames));
+			sb.Append(BuildObjectReference(ci.ObjectReference));
 			sb.Append("(");
 			sb.Append(BuildParameterList(ci.ParameterValues));
 			sb.Append(")");
@@ -177,7 +202,7 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 		}
 		else if (item is MethodCall mc)
 		{
-			sb.Append(BuildObjectReference(mc.ObjectName.ObjectNames));
+			sb.Append(BuildObjectReference(mc.ObjectName));
 			sb.Append('.');
 			sb.Append(mc.MethodName);
 			if (mc.GenericParameters != null)
@@ -192,16 +217,9 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 		}
 		else if (item is PropertyAssignment pa)
 		{
-			sb.Append(BuildObjectReference(pa.ObjectReference.ObjectNames));
+			sb.Append(BuildObjectReference(pa.ObjectReference));
 			sb.Append(" = ");
-			if (pa.Value != null)
+			sb.Append(ExpressionOrLiteral(pa.Value));
-			{
-				sb.Append(pa.Value);
-			}
-			else
-			{
-				sb.Append("null");
-			}
 		}
 		return sb.ToString();
 	}
@@ -242,7 +260,7 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 		}
 		else if (value is ObjectReference orr)
 		{
-			return BuildObjectReference(orr.ObjectNames);
+			return BuildObjectReference(orr);
 		}
 		return value.ToString() ?? "";
 	}
@@ -251,20 +269,49 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 
 	protected ObjectReference ParseObjectReference(string value)
 	{
-		string[] parts = value.Split(new char[] { '.' });
+		string[]? genericArgs = null;
-		return new ObjectReference(parts);
+		string typePart = value;
+		List<ObjectReference> genericArgList = new List<ObjectReference>();
+		if (value.Contains('<') && value.Contains('>'))
+		{
+			string genericPart = value.Substring(value.IndexOf('<') + 1, value.IndexOf('>') - value.IndexOf('<') - 1);
+			genericArgs = genericPart.Split(new char[] { ',' });
+			foreach (string genericArg in genericArgs)
+			{
+				genericArgList.Add(ParseObjectReference(genericArg));
+			}
+			typePart = value.Substring(0, value.IndexOf('<'));
+		}
+		string[] parts = typePart.Split(new char[] { '.' });
+		return new ObjectReference(parts, genericArgList);
 	}
 
-	protected Property GenerateProperty(PropertyInfo pi)
+	protected Property GenerateProperty(CodeGeneration.Class parentClass, PropertyInfo pi)
 	{
 		Property pp = new Property(pi.Name, ParseObjectReference(SafeTypeName(pi.PropertyType)));
 		pp.AccessModifier = AccessModifier.Public;
 		if (pi.PropertyType.IsSubclassOfGeneric(typeof(IList<>)))
 		{
-			pp.GetMethod = new Method(new IMethodMember[]
+			Type[] genericArgs = pi.PropertyType.GetGenericArguments();
+			if (genericArgs.Length == 1 && genericArgs[0].GetInterfaces().Contains(typeof(IOmsClass)))
 			{
-				new Return(null)
+				Field backingField = new Field("__backing_" + pi.Name, ParseObjectReference(SafeTypeName(pi.PropertyType)));
-			});
+				parentClass.Items.Add(backingField);
+
+				pp.GetMethod = new Method(new IMethodMember[]
+				{
+					new Return(new ObjectReference(new string[] { "__backing_" + pi.Name }))
+				});
+				pp.UseAutoProperty = false;
+				pp.ReadOnly = true;
+			}
+			else
+			{
+				pp.GetMethod = new Method(new IMethodMember[]
+				{
+					new Return(null)
+				});
+			}
 
 			if (pi.GetSetMethod() != null)
 			{
@@ -281,7 +328,7 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 				new Return(new MethodCall(new string[] { "this", "Oms" }, "GetAttributeValue", new object[]
 				{
 					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new ObjectReference(new string[] { "this", "GlobalIdentifier" })}),
-					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new CreateInstance(new string[] { "System", "Guid" }, new object[] { "{9153A637-992E-4712-ADF2-B03F0D9EDEA6}" })})
+					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new CreateInstance(new ObjectReference(new string[] { "System", "Guid" }), new object[] { "{9153A637-992E-4712-ADF2-B03F0D9EDEA6}" })})
 				}) { GenericParameters = [ new ObjectReference(["string"]) ]})
 			});
 			// GetAttributeValue<T>(InstanceKey source, InstanceHandle attribute, T defaultValue = default(T), DateTime? effectiveDate = null)
@@ -298,7 +345,7 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 				new Return(new MethodCall(new string[] { "this", "Oms" }, "GetAttributeValue", new object[]
 				{
 					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new ObjectReference(new string[] { "this", "GlobalIdentifier" })}),
-					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new CreateInstance(new string[] { "System", "Guid" }, new object[] { "{9153A637-992E-4712-ADF2-B03F0D9EDEA6}" })})
+					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new CreateInstance(new ObjectReference(new string[] { "System", "Guid" }), new object[] { "{9153A637-992E-4712-ADF2-B03F0D9EDEA6}" })})
 				}) { GenericParameters = [ new ObjectReference(["int"]) ]})
 			});
 			// GetAttributeValue<T>(InstanceKey source, InstanceHandle attribute, T defaultValue = default(T), DateTime? effectiveDate = null)
@@ -315,7 +362,7 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 				new Return(new MethodCall(new string[] { "this", "Oms" }, "GetAttributeValue", new object[]
 				{
 					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new ObjectReference(new string[] { "this", "GlobalIdentifier" })}),
-					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new CreateInstance(new string[] { "System", "Guid" }, new object[] { "{9153A637-992E-4712-ADF2-B03F0D9EDEA6}" })})
+					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new CreateInstance(new ObjectReference(new string[] { "System", "Guid" }), new object[] { "{9153A637-992E-4712-ADF2-B03F0D9EDEA6}" })})
 				}) { GenericParameters = [ new ObjectReference(["decimal"]) ]})
 			});
 			// GetAttributeValue<T>(InstanceKey source, InstanceHandle attribute, T defaultValue = default(T), DateTime? effectiveDate = null)
@@ -332,7 +379,7 @@ public class CSharpCodeGenerator : DotNetCodeGenerator
 				new Return(new MethodCall(new string[] { "this", "Oms" }, "GetAttributeValue", new object[]
 				{
 					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new ObjectReference(new string[] { "this", "GlobalIdentifier" })}),
-					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new CreateInstance(new string[] { "System", "Guid" }, new object[] { "{9153A637-992E-4712-ADF2-B03F0D9EDEA6}" })})
+					new MethodCall(new string[] { "this", "Oms" }, "GetInstance", new object[] { new CreateInstance(new ObjectReference(new string[] { "System", "Guid" }), new object[] { "{9153A637-992E-4712-ADF2-B03F0D9EDEA6}" })})
 				}) { GenericParameters = [ new ObjectReference(["System.DateTime"]) ]})
 			});
 			// GetAttributeValue<T>(InstanceKey source, InstanceHandle attribute, T defaultValue = default(T), DateTime? effectiveDate = null)

mocha-dotnet/src/lib/Mocha.Modeling/CodeGeneration/Generators/DotNetCodeGenerator.cs

@@ -28,7 +28,7 @@ public abstract class DotNetCodeGenerator : CodeGenerator
 {
 	public string GenerateCode(ObjectReference objectReference)
 	{
-		return BuildObjectReference(objectReference.ObjectNames);
+		return BuildObjectReference(objectReference);
 	}
 	protected string? SafeTypeName(Type type)
 	{
@@ -92,22 +92,20 @@ public abstract class DotNetCodeGenerator : CodeGenerator
 
 	protected abstract string ExpressionOrLiteral(object? value);
 
-	protected virtual string BuildObjectReference(IEnumerable<string> objectNames)
+	protected virtual string BuildObjectReference(ObjectReference objectReference)
 	{
 		StringBuilder sb = new StringBuilder();
-		int i = 0;
+		sb.Append(String.Join('.', objectReference.ObjectNames));
-		foreach (string objectName in objectNames)
+		if (objectReference.GenericArguments != null && objectReference.GenericArguments.Count() > 0)
 		{
-			sb.Append(objectName);
+			sb.Append('<');
-			if (i < objectNames.Count() - 1)
+			sb.Append(String.Join(',', objectReference.GenericArguments));
-			{
+			sb.Append('>');
-				sb.Append('.');
-			}
-			i++;
 		}
 		return sb.ToString();
 	}
 
+
 	protected Assembly CompileScript(SyntaxTree syntaxTree, IEnumerable<string>? additionalDLLs = null)
 	{
 		// thanks https://stackoverflow.com/questions/66672329

mocha-dotnet/src/lib/Mocha.Modeling/OmsObjectFactory.cs

@@ -41,6 +41,17 @@ public class OmsObjectFactory<TOmsClass> : CSharpCodeGenerator where TOmsClass :
 		{
 			CreateType(oms, t2);
 		}
+		foreach (Type t2 in t.GetNestedTypes())
+		{
+			PropertyInfo[] pis = t2.GetProperties(BindingFlags.Public | BindingFlags.Instance);
+			foreach (PropertyInfo pi in pis)
+			{
+				if (pi.PropertyType.IsSubclassOfGeneric(typeof(IList<>)) || pi.PropertyType.GetInterfaces().Contains(typeof(IOmsClass)))
+				{
+					CreateRelationship(oms, t2, pi);
+				}
+			}
+		}
 
 		Type?[] tis;
 		try
@@ -60,6 +71,58 @@ public class OmsObjectFactory<TOmsClass> : CSharpCodeGenerator where TOmsClass :
 		}
 		throw new TypeInitializationException(typeof(TOmsClass).Name, null);
 	}
+
+	private void CreateRelationship(Oms oms, Type parentClassType, PropertyInfo pi)
+	{
+		OmsRelationshipTypeAttribute? attrRelationshipType = pi.GetCustomAttribute<OmsRelationshipTypeAttribute>();
+		OmsGlobalIdentifierAttribute? attrGlobalIdentifier = pi.GetCustomAttribute<OmsGlobalIdentifierAttribute>();
+
+		if (attrGlobalIdentifier != null)
+		{
+			if (!oms.TryGetInstance(attrGlobalIdentifier.GlobalIdentifier, out InstanceHandle ih))
+			{
+				InstanceHandle ihRelationship = oms.CreateInstanceOf(oms.GetInstance(KnownInstanceGuids.Classes.Relationship), attrGlobalIdentifier.GlobalIdentifier);
+
+				InstanceHandle ihSourceClass = InstanceHandle.Empty;
+				InstanceHandle ihDestinationClass = InstanceHandle.Empty;
+
+				OmsGlobalIdentifierAttribute? attrParentClassGlobalIdentifier = parentClassType.GetCustomAttribute<OmsGlobalIdentifierAttribute>();
+				if (attrParentClassGlobalIdentifier != null)
+				{
+					ihSourceClass = oms.GetInstance(attrParentClassGlobalIdentifier.GlobalIdentifier);
+				}
+
+				bool singular = false;
+				if (pi.PropertyType.IsSubclassOfGeneric(typeof(IList<>)))
+				{
+					OmsGlobalIdentifierAttribute? attrTargetClassGlobalIdentifier = pi.PropertyType.GetGenericArguments()[0].GetCustomAttribute<OmsGlobalIdentifierAttribute>();
+					if (attrTargetClassGlobalIdentifier != null)
+					{
+						ihDestinationClass = oms.GetInstance(attrTargetClassGlobalIdentifier.GlobalIdentifier);
+					}
+					singular = false;
+				}
+				else if (pi.PropertyType.GetInterfaces().Contains(typeof(IOmsClass)))
+				{
+					OmsGlobalIdentifierAttribute? attrTargetClassGlobalIdentifier = pi.PropertyType.GetCustomAttribute<OmsGlobalIdentifierAttribute>();
+					if (attrTargetClassGlobalIdentifier != null)
+					{
+						ihDestinationClass = oms.GetInstance(attrTargetClassGlobalIdentifier.GlobalIdentifier);
+					}
+					singular = true;
+				}
+
+				oms.AssignRelationship(ihRelationship, oms.GetInstance(KnownRelationshipGuids.Relationship__has_source__Class), ihSourceClass);
+				oms.AssignRelationship(ihRelationship, oms.GetInstance(KnownRelationshipGuids.Relationship__has_destination__Class), ihDestinationClass);
+				if (attrRelationshipType != null)
+				{
+					oms.SetAttributeValue(ihRelationship, oms.GetInstance(KnownAttributeGuids.Text.RelationshipType), attrRelationshipType.Value);
+				}
+				oms.SetAttributeValue(ihRelationship, oms.GetInstance(KnownAttributeGuids.Boolean.Singular), singular);
+			}
+		}
+	}
+
 	public TOmsClass CreateInstance(Oms oms, Guid globalIdentifier)
 	{
 		string script = BuildScript(globalIdentifier);
@@ -132,14 +195,29 @@ public class OmsObjectFactory<TOmsClass> : CSharpCodeGenerator where TOmsClass :
 
 		foreach (PropertyInfo pi in t.GetProperties(BindingFlags.Public | BindingFlags.Instance))
 		{
-			cl.Items.Add(GenerateProperty(pi));
+			cl.Items.Add(GenerateProperty(cl, pi));
 		}
 
 		cl.Items.Add(new Property("Oms", new ObjectReference(new string[] { "Mocha", "Core", "Oms" }), null) { AccessModifier = CodeGeneration.AccessModifier.Public, UseAutoProperty = true, ReadOnly = false });
-		cl.Items.Add(new CodeGeneration.Method("Initialize", new MethodParameter[] { new MethodParameter("oms", new ObjectReference(["Mocha", "Core", "Oms"]))}, new IMethodMember[]
+
+		List<IMethodMember> list = new List<IMethodMember>();
+		list.Add(new PropertyAssignment(new ObjectReference(["this", "Oms"]), "oms"));
+		foreach (IClassMember item in cl.Items)
 		{
-			new PropertyAssignment(new ObjectReference(["this", "Oms"]), "oms")
+			if (item is Field f)
-		}) { AccessModifier = CodeGeneration.AccessModifier.Public});
+			{
+				if (f.Name.StartsWith("__backing_"))
+				{
+					ObjectReference returnType = f.ReturnType;
+					if (f.ReturnType.ToString().StartsWith("System.Collections.Generic.IList<"))
+					{
+						returnType = new ObjectReference(["Mocha", "Core", "Modeling", "PropertyImplementations", "OmsNonsingularRelationshipProperty"], f.ReturnType.GenericArguments);
+					}
+					list.Add(new PropertyAssignment(new ObjectReference(["this", f.Name]), new CreateInstance(returnType, new object[] { new ObjectReference(["this", "Oms"]) })));
+				}
+			}
+		}
+		cl.Items.Add(new CodeGeneration.Method("Initialize", new MethodParameter[] { new MethodParameter("oms", new ObjectReference(["Mocha", "Core", "Oms"])) }, list) { AccessModifier = CodeGeneration.AccessModifier.Public });
 
 		return cl;
 	}
@@ -155,12 +233,12 @@ public class OmsObjectFactory<TOmsClass> : CSharpCodeGenerator where TOmsClass :
 			globalIdentifier = OmsDatabase.GetGlobalIdentifierForClass(t);
 		}
 
-		cl.Items.Add(new Property("GlobalIdentifier", new ObjectReference(new string[] { "System", "Guid" }), new CreateInstance(["System", "Guid"], [globalIdentifier.ToString()])) { AccessModifier = CodeGeneration.AccessModifier.Public });
+		cl.Items.Add(new Property("GlobalIdentifier", new ObjectReference(new string[] { "System", "Guid" }), new CreateInstance(new ObjectReference(["System", "Guid"]), [globalIdentifier.ToString()])) { AccessModifier = CodeGeneration.AccessModifier.Public });
 		cl.Items.Add(new Property("Oms", new ObjectReference(new string[] { "Mocha", "Core", "Oms" }), null) { AccessModifier = CodeGeneration.AccessModifier.Public, UseAutoProperty = true, ReadOnly = false });
 
 		foreach (PropertyInfo pi in t.GetProperties(BindingFlags.Public | BindingFlags.Instance))
 		{
-			cl.Items.Add(GenerateProperty(pi));
+			cl.Items.Add(GenerateProperty(cl, pi));
 		}
 		return cl;
 	}

mocha-dotnet/src/lib/Mocha.Modeling/OmsPropertyImplementation.cs

@@ -0,0 +1,26 @@
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
+// 
+// This file is part of Mocha.NET.
+// 
+// Mocha.NET is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// Mocha.NET is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
+
+namespace Mocha.Core.Modeling;
+
+public abstract class OmsPropertyImplementation
+{
+	internal OmsPropertyImplementation(Oms oms)
+	{
+		
+	}
+}

mocha-dotnet/src/lib/Mocha.Modeling/PropertyImplementations/OmsNonsingularRelationshipProperty.cs

@@ -15,8 +15,71 @@
 // You should have received a copy of the GNU General Public License
 // along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
 
+using System.Collections;
+using Mocha.Modeling;
+
 namespace Mocha.Core.Modeling.PropertyImplementations;
 
-public class OmsNonsingularRelationshipProperty : OmsRelationshipProperty
+public class OmsNonsingularRelationshipProperty<T> : OmsPropertyImplementation, IList<T> where T : IOmsClass
 {
+	internal OmsNonsingularRelationshipProperty(Oms oms) : base(oms)
+	{
+		
+	}
+	
+	public T this[int index] { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }
+
+	public int Count => throw new NotImplementedException();
+
+	public bool IsReadOnly => throw new NotImplementedException();
+
+	public void Add(T item)
+	{
+		throw new NotImplementedException();
+	}
+
+	public void Clear()
+	{
+		throw new NotImplementedException();
+	}
+
+	public bool Contains(T item)
+	{
+		throw new NotImplementedException();
+	}
+
+	public void CopyTo(T[] array, int arrayIndex)
+	{
+		throw new NotImplementedException();
+	}
+
+	public IEnumerator<T> GetEnumerator()
+	{
+		throw new NotImplementedException();
+	}
+
+	public int IndexOf(T item)
+	{
+		throw new NotImplementedException();
+	}
+
+	public void Insert(int index, T item)
+	{
+		throw new NotImplementedException();
+	}
+
+	public bool Remove(T item)
+	{
+		throw new NotImplementedException();
+	}
+
+	public void RemoveAt(int index)
+	{
+		throw new NotImplementedException();
+	}
+
+	IEnumerator IEnumerable.GetEnumerator()
+	{
+		return GetEnumerator();
+	}
 }

mocha-dotnet/src/lib/Mocha.Modeling/PropertyImplementations/OmsSingularRelationshipProperty.cs

@@ -1,4 +1,4 @@
-// Copyright (C) 2024 Michael Becker  <alcexhim@gmail.com>
+// Copyright (C) 2025 Michael Becker  <alcexhim@gmail.com>
 // 
 // This file is part of Mocha.NET.
 // 
@@ -15,9 +15,9 @@
 // You should have received a copy of the GNU General Public License
 // along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
 
+
 namespace Mocha.Core.Modeling.PropertyImplementations;
 
-public abstract class OmsRelationshipProperty
+public class OmsSingularRelationshipProperty
 {
-	
 }

mocha-dotnet/tests/Mocha.Core.Tests/InheritanceTests.cs

@@ -15,6 +15,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Mocha.NET.  If not, see <https://www.gnu.org/licenses/>.
 
+using Mocha.Core.Oop;
+using Mocha.Core.Oop.Methods;
 using Mocha.Testing;
 
 namespace Mocha.Core.Tests;
@@ -51,4 +53,89 @@ public class InheritanceTests : OmsTestsBase
 		InstanceHandle ihParentClass = Oms.GetParentClass(ihTextAttribute);
 		Assert.That(ihParentClass, Is.EqualTo(ihClass));
 	}
+
+	[Test]
+	public void Unimplemented_Abstract_Method_Call_throws_Exception()
+	{
+		// this is what we want to achieve:
+		// Abstract Base Class (e.g. Layout) defines attribute `Widget Name` which should be overridden by subclasses
+		// Abstract Base Class also defines a single Get Attribute method which returns `Widget Name`
+
+		// Concrete Subclass (e.g. Stylized Header Layout) overrides `Widget Name` attribute by re-defining it on the subclass
+		// Calling `Abstract Base Class@get Widget Name` with the subclass as `this` parm SHOULD return the overridden attribute value
+
+		// The Method should only be defined ONCE, and changes based on the overridden attributes of the subclasses
+
+		InstanceHandle c_TestClass = Oms.GetInstance(TEST_CLASS_GUID);
+
+		// `Test Class@get Widget Name(BA)` which is Abstract
+		BuildAttributeMethod m_TestMethod = Oms.MethodBuilder.CreateBuildAttributeMethod(c_TestClass, "get", "Widget Name", Core.Oop.AccessModifier.Public, false, Oms.GetInstance(KnownAttributeGuids.Text.Name), "DO_NOT_USE");
+		Oms.SetAttributeValue(m_TestMethod, Oms.GetInstance(KnownAttributeGuids.Boolean.Abstract), true);
+		ReturnAttributeMethodBinding ramb = m_TestMethod.CreateMethodBinding(Oms);
+
+		InstanceHandle c_TestClass2 = Oms.GetInstance(TEST_CLASS2_GUID);
+		Oms.AddSuperClass(c_TestClass2, c_TestClass);
+
+		// i_TestClass1 is an instance of c_TestClass2, which by inheritance includes c_TestClass
+		InstanceHandle i_TestClass1 = Oms.CreateInstanceOf(c_TestClass2);
+
+		OmsContext context = Oms.CreateContext();
+		Assert.That(delegate ()
+		{
+			// set the c_TestClass to i_TestClass1
+			// this call SHOULD succeed given that c_TestClass is a superclass of c_TestClass2, but I don't think this is enforced (yet)
+			context.SetWorkData(c_TestClass, i_TestClass1);
+
+			// this should throw an exception since c_TestClass2 does not yet implement the m_TestMethod defined as abstract on c_TestClass
+			string nom = Oms.ExecuteReturningAttributeValue<string>(context, ramb);
+		}, Throws.InvalidOperationException);
+
+	}
+	
+	[Test]
+	public void Overridden_Abstract_Method_Call_does_not_throw_Exception()
+	{
+		// this is what we want to achieve:
+		// Abstract Base Class (e.g. Layout) defines attribute `Widget Name` which should be overridden by subclasses
+		// Abstract Base Class also defines a single Get Attribute method which returns `Widget Name`
+
+		// Concrete Subclass (e.g. Stylized Header Layout) overrides `Widget Name` attribute by re-defining it on the subclass
+		// Calling `Abstract Base Class@get Widget Name` with the subclass as `this` parm SHOULD return the overridden attribute value
+
+		// The Method should only be defined ONCE, and changes based on the overridden attributes of the subclasses
+
+		InstanceHandle c_TestClass = Oms.GetInstance(TEST_CLASS_GUID);
+		
+		// `Test Class@get Widget Name(BA)` which is Abstract
+		BuildAttributeMethod m_TestMethod = Oms.MethodBuilder.CreateBuildAttributeMethod(c_TestClass, "get", "Widget Name", Core.Oop.AccessModifier.Public, false, Oms.GetInstance(KnownAttributeGuids.Text.Name), "DO_NOT_USE");
+		Oms.SetAttributeValue(m_TestMethod, Oms.GetInstance(KnownAttributeGuids.Boolean.Abstract), true);
+		ReturnAttributeMethodBinding ramb = m_TestMethod.CreateMethodBinding(Oms);
+
+		InstanceHandle c_TestClass2 = Oms.GetInstance(TEST_CLASS2_GUID);
+		Oms.AddSuperClass(c_TestClass2, c_TestClass);
+
+		// `Test Class 2@get Widget Name(BA)` which is overriding the Abstract defined above
+		string NOM_TEST_VALUE = "Hello World Test Class";
+		BuildAttributeMethod m_TestMethod2 = Oms.MethodBuilder.CreateBuildAttributeMethod(c_TestClass2, "get", "Widget Name", Core.Oop.AccessModifier.Public, false, Oms.GetInstance(KnownAttributeGuids.Text.Name), NOM_TEST_VALUE);
+		ReturnAttributeMethodBinding ramb2 = m_TestMethod2.CreateMethodBinding(Oms);
+		Oms.AssignRelationship(m_TestMethod2, Oms.GetInstance(KnownRelationshipGuids.Method__implements__Method), m_TestMethod);
+
+		// i_TestClass1 is an instance of c_TestClass2, which by inheritance includes c_TestClass
+		InstanceHandle i_TestClass1 = Oms.CreateInstanceOf(c_TestClass2);
+
+		OmsContext context = Oms.CreateContext();
+		string nom = "";
+		Assert.That(delegate ()
+		{
+			// set the c_TestClass to i_TestClass1
+			// this call SHOULD succeed given that c_TestClass is a superclass of c_TestClass2, but I don't think this is enforced (yet)
+			context.SetWorkData(c_TestClass, i_TestClass1);
+
+			// this should throw an exception since c_TestClass2 does not yet implement the m_TestMethod defined as abstract on c_TestClass
+			nom = Oms.ExecuteReturningAttributeValue<string>(context, ramb);
+		}, Throws.Nothing);
+
+		Assert.That(nom, Is.EqualTo(NOM_TEST_VALUE));
+
+	}
 }

mocha-dotnet/tests/Mocha.Core.Tests/MethodTests/MethodBindingTests.cs

@@ -33,17 +33,17 @@ public class MethodBindingTests : MethodTestsBase
 	[Test]
 	public void REMBInheritsFromMethodBinding()
 	{
-		/*
 		OmsMethodBuilder mb = new OmsMethodBuilder(Oms);
 		InstanceHandle c_MethodBinding = Oms.GetInstance(KnownInstanceGuids.Classes.MethodBinding);
 		InstanceHandle a_Text = Oms.GetInstance(KnownAttributeGuids.Text.Value);
 
-		MethodReturningAttribute dummy = mb.CreateGetAttributeMethod(c_TestClass, "get", "Test Attribute", a_Text);
+		InstanceHandle hasBemProcess = Oms.CreateInstanceOf(Oms.GetInstance(KnownInstanceGuids.Classes.BEMProcess));
+		InstanceHandle elem = Oms.CreateInstanceOf(Oms.GetInstance(KnownInstanceGuids.Classes.Element));
 
-		InstanceHandle handle = mb.CreateReturnAttributeMethodBinding(dummy).Handle;
+		MethodReturningElement dummy = mb.CreateBuildElementMethod(c_TestClass, "get", "Test Element", AccessModifier.Public, true, hasBemProcess, elem);
+
+		InstanceHandle handle = mb.CreateReturnElementMethodBinding(dummy).GetHandle();
 		Assert.That(Oms.IsInstanceOf(handle, c_MethodBinding));
-		*/
-		Assert.Ignore();
 	}
 	[Test]
 	public void BRMBInheritsFromMethodBinding()
@@ -75,32 +75,28 @@ public class MethodBindingTests : MethodTestsBase
 	[Test]
 	public void PUMBInheritsFromMethodBinding()
 	{
-		/*
 		OmsMethodBuilder mb = new OmsMethodBuilder(Oms);
 		InstanceHandle c_MethodBinding = Oms.GetInstance(KnownInstanceGuids.Classes.MethodBinding);
 		InstanceHandle a_Text = Oms.GetInstance(KnownAttributeGuids.Text.Value);
 
-		MethodReturningAttribute dummy = mb.CreateGetAttributeMethod(c_TestClass, "get", "Test Attribute", a_Text);
+		List<ExecuteUpdateMethodBinding> eumbs = new List<ExecuteUpdateMethodBinding>();
+		ProcessUpdatesMethod dummy = mb.CreateProcessUpdatesMethod(c_TestClass, "process", "Test Attribute", AccessModifier.Public, true, eumbs);
 
-		InstanceHandle handle = mb.CreateReturnAttributeMethodBinding(dummy).Handle;
+		InstanceHandle handle = mb.CreateProcessUpdatesMethodBinding(dummy).GetHandle();
 		Assert.That(Oms.IsInstanceOf(handle, c_MethodBinding));
-		*/
-		Assert.Ignore();
 	}
 	[Test]
 	public void EUMBInheritsFromMethodBinding()
 	{
-		/*
 		OmsMethodBuilder mb = new OmsMethodBuilder(Oms);
 		InstanceHandle c_MethodBinding = Oms.GetInstance(KnownInstanceGuids.Classes.MethodBinding);
 		InstanceHandle a_Text = Oms.GetInstance(KnownAttributeGuids.Text.Value);
+		InstanceHandle a_Token = Oms.GetInstance(KnownAttributeGuids.Text.Token);
 
-		MethodReturningAttribute dummy = mb.CreateGetAttributeMethod(c_TestClass, "get", "Test Attribute", a_Text);
+		AssignAttributeMethod dummy = mb.CreateAssignAttributeMethod(c_TestClass, "set", "Test Attribute", AccessModifier.Public, true, a_Token, a_Text);
 
-		InstanceHandle handle = mb.CreateReturnAttributeMethodBinding(dummy).Handle;
+		InstanceHandle handle = mb.CreateExecuteUpdateMethodBinding(dummy).GetHandle();
 		Assert.That(Oms.IsInstanceOf(handle, c_MethodBinding));
-		*/
-		Assert.Ignore();
 	}
 
 	[Test]

mocha-dotnet/tests/Mocha.Core.Tests/MethodTests/SystemRoutineTests.cs

@@ -53,22 +53,63 @@ public class SystemRoutineTests : MethodTestsBase
 		OmsMethodBuilder methodBuilder = new OmsMethodBuilder(Oms);
 		OmsSystemRoutineBuilder systemRoutineBuilder = new OmsSystemRoutineBuilder(Oms);
 
+		// create a System Attribute Routine to return a test value
 		SystemAttributeRoutine<string> testSystemAttributeRoutine = systemRoutineBuilder.CreateSystemAttributeRoutine(TEST_SYSTEM_ATTRIBUTE_ROUTINE_GUID, delegate (Oms oms, OmsContext context)
 		{
 			string value = context.GetWorkData<string>(oms.GetInstance(KnownAttributeGuids.Text.Token));
 			return TEST_SYSTEM_ATTRIBUTE_ROUTINE_VALUE + value;
 		});
 
+		// create a GAS - Get Attribute by System Routine method which returns the attribute via the above system routine
 		GetAttributeBySystemRoutineMethod gasMethod = methodBuilder.CreateGetAttributeBySystemRoutineMethod(irTestClass, "get", "Test System Routine Text Attribute", AccessModifier.Public, true, Oms.GetInstance(KnownAttributeGuids.Text.Value), testSystemAttributeRoutine);
 		ReturnAttributeMethodBinding gasMethodRamb = methodBuilder.CreateReturnAttributeMethodBinding(gasMethod);
 
 		OmsContext context = Oms.CreateContext();
+
+		// execute the above RAMB, passing in the `Token` parameter with an expected hardcoded string
 		string value = Oms.ExecuteReturningAttributeValue<string>(context, gasMethodRamb, null, new KeyValuePair<InstanceHandle, object>[]
 		{
 			// !!! WARNING: do not use 'Value' here as it is the return type attribute of the GAS method and WILL be overwritten after execution !!!
 			new KeyValuePair<InstanceHandle, object>(Oms.GetInstance(KnownAttributeGuids.Text.Token), "pqdms")
 		});
 
+		// check to ensure that the result is the above executed System Routine which combines the test value with the passed in parameter
+		Assert.That(value, Is.EqualTo(TEST_SYSTEM_ATTRIBUTE_ROUTINE_VALUE + "pqdms"));
+	}
+
+	[Test]
+	public void PassParmViaSystemRoutineTest_AssignedViaRAMB()
+	{
+		InstanceHandle irTestClass = Oms.GetInstance(TEST_CLASS_GUID);
+		OmsMethodBuilder methodBuilder = new OmsMethodBuilder(Oms);
+		OmsSystemRoutineBuilder systemRoutineBuilder = new OmsSystemRoutineBuilder(Oms);
+
+		// create a System Attribute Routine to return a test value
+		SystemAttributeRoutine<string> testSystemAttributeRoutine = systemRoutineBuilder.CreateSystemAttributeRoutine(TEST_SYSTEM_ATTRIBUTE_ROUTINE_GUID, delegate (Oms oms, OmsContext context)
+		{
+			string value = context.GetWorkData<string>(oms.GetInstance(KnownAttributeGuids.Text.Token));
+			return TEST_SYSTEM_ATTRIBUTE_ROUTINE_VALUE + value;
+		});
+
+		// create a GAS - Get Attribute by System Routine method which returns the attribute via the above system routine
+		GetAttributeBySystemRoutineMethod gasMethod = methodBuilder.CreateGetAttributeBySystemRoutineMethod(irTestClass, "get", "Test System Routine Text Attribute", AccessModifier.Public, true, Oms.GetInstance(KnownAttributeGuids.Text.Value), testSystemAttributeRoutine);
+		ReturnAttributeMethodBinding gasMethodRamb = methodBuilder.CreateReturnAttributeMethodBinding(gasMethod, new KeyValuePair<InstanceHandle, InstanceHandle>[]
+		{
+			// assign from work data: `User Name` to parm: `Token`
+			new KeyValuePair<InstanceHandle, InstanceHandle>(Oms.GetInstance(KnownAttributeGuids.Text.Token), Oms.GetInstance(KnownAttributeGuids.Text.UserName))
+		});
+
+		OmsContext context = Oms.CreateContext();
+
+		// execute the above RAMB, passing in the `Token` parameter with an expected hardcoded string
+		// here we specify `User Name` attribute instead of `Token`; the RAMB is set to assign `Token` = 
+		string value = Oms.ExecuteReturningAttributeValue<string>(context, gasMethodRamb, null, new KeyValuePair<InstanceHandle, object>[]
+		{
+			// !!! WARNING: do not use 'Value' here as it is the return type attribute of the GAS method and WILL be overwritten after execution !!!
+			new KeyValuePair<InstanceHandle, object>(Oms.GetInstance(KnownAttributeGuids.Text.UserName), "pqdms")
+		});
+
+		// check to ensure that the result is the above executed System Routine which combines the test value with the passed in parameter
 		Assert.That(value, Is.EqualTo(TEST_SYSTEM_ATTRIBUTE_ROUTINE_VALUE + "pqdms"));
 	}
 

mocha-dotnet/tests/Mocha.Core.Tests/WorkSetTests.cs

@@ -59,6 +59,28 @@ public class WorkSetTests : OmsTestsBase
 		}, Throws.ArgumentException);
 	}
 
+	[Test]
+	public void SingleValidClassConstraintWithInheritance()
+	{
+		// we should be able to put a `Text Attribute` instance into this Work Set if its valid class is `Attribute`
+		InstanceHandle c_Attribute = Oms.GetInstance(KnownInstanceGuids.Classes.Attribute);
+		InstanceHandle c_TextAttribute = Oms.GetInstance(KnownInstanceGuids.Classes.TextAttribute);
+
+		WorkSet workSet = Oms.CreateWorkSet("Dummy Work Set", true, new InstanceHandle[]
+		{
+			c_Attribute
+		});
+		Oms.SetAttributeValue(workSet, Oms.GetInstance(KnownAttributeGuids.Boolean.IncludeSubclasses), true);
+
+		InstanceHandle a_Name = Oms.GetInstance(KnownAttributeGuids.Text.Name);
+
+		OmsContext context = Oms.CreateContext();
+		Assert.That(delegate ()
+		{
+			context.SetWorkData(workSet, a_Name);
+		}, Throws.Nothing);
+	}
+
 	[Test]
 	public void MultipleValidClassConstraintSingular()
 	{
@@ -151,4 +173,64 @@ public class WorkSetTests : OmsTestsBase
 			context.SetWorkData(workSet, true);
 		}, Throws.ArgumentException);
 	}
+
+	[Test]
+	public void TextAttributeWorkData()
+	{
+		OmsContext context = Oms.CreateContext();
+		Assert.That(delegate ()
+		{
+			// cannot assign boolean to Text Attribute
+			InstanceHandle a_Name = Oms.GetInstance(KnownAttributeGuids.Text.Name);
+			context.SetWorkData(a_Name, true);
+		}, Throws.ArgumentException);
+		Assert.That(delegate ()
+		{
+			// cannot assign DateTime to Text Attribute
+			InstanceHandle a_Name = Oms.GetInstance(KnownAttributeGuids.Text.Name);
+			context.SetWorkData(a_Name, DateTime.Now);
+		}, Throws.ArgumentException);
+		Assert.That(delegate ()
+		{
+			// cannot assign decimal to Text Attribute
+			InstanceHandle a_Name = Oms.GetInstance(KnownAttributeGuids.Text.Name);
+			context.SetWorkData(a_Name, 5.3M);
+		}, Throws.ArgumentException);
+		Assert.That(delegate ()
+		{
+			// can assign string to Text Attribute
+			InstanceHandle a_Name = Oms.GetInstance(KnownAttributeGuids.Text.Name);
+			context.SetWorkData(a_Name, "hello world");
+		}, Throws.Nothing);
+	}
+
+	[Test]
+	public void DateAttributeWorkData()
+	{
+		OmsContext context = Oms.CreateContext();
+		Assert.That(delegate ()
+		{
+			// cannot assign boolean to Date Attribute
+			InstanceHandle a_Name = Oms.GetInstance(KnownAttributeGuids.Date.DateAndTime);
+			context.SetWorkData(a_Name, true);
+		}, Throws.ArgumentException);
+		Assert.That(delegate ()
+		{
+			// cannot assign decimal to Date Attribute
+			InstanceHandle a_Name = Oms.GetInstance(KnownAttributeGuids.Date.DateAndTime);
+			context.SetWorkData(a_Name, 5.3M);
+		}, Throws.ArgumentException);
+		Assert.That(delegate ()
+		{
+			// cannot assign string to Date Attribute
+			InstanceHandle a_Name = Oms.GetInstance(KnownAttributeGuids.Date.DateAndTime);
+			context.SetWorkData(a_Name, "hello world");
+		}, Throws.ArgumentException);
+		Assert.That(delegate ()
+		{
+			// can assign DateTime to Date Attribute
+			InstanceHandle a_Name = Oms.GetInstance(KnownAttributeGuids.Date.DateAndTime);
+			context.SetWorkData(a_Name, DateTime.Now);
+		}, Throws.Nothing);
+	}
 }