Index: src/Core/CompactRepositorySelector.cs
===================================================================
--- src/Core/CompactRepositorySelector.cs	(revision 505391)
+++ src/Core/CompactRepositorySelector.cs	(working copy)
@@ -186,6 +186,8 @@
 				{
 					// Must create the repository
 					rep = CreateRepository(DefaultRepositoryName, repositoryType);
+				    // set assembly
+                    rep.Assembly = assembly;
 				}
 
 				return rep;
Index: src/Core/DefaultRepositorySelector.cs
===================================================================
--- src/Core/DefaultRepositorySelector.cs	(revision 505391)
+++ src/Core/DefaultRepositorySelector.cs	(working copy)
@@ -292,6 +292,8 @@
 					{
 						// Create the repository
 						rep = CreateRepository(actualRepositoryName, actualRepositoryType);
+					    // set assembly
+                        rep.Assembly = repositoryAssembly;
 
 						if (readAssemblyAttributes)
 						{
Index: src/Layout/Pattern/AsmDescPatternConverter.cs
===================================================================
--- src/Layout/Pattern/AsmDescPatternConverter.cs	(revision 0)
+++ src/Layout/Pattern/AsmDescPatternConverter.cs	(revision 0)
@@ -0,0 +1,73 @@
+#region Copyright & License
+//
+// Copyright 2001-2005 The Apache Software Foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#endregion
+
+using System;
+using System.Reflection;
+using System.Text;
+using System.IO;
+
+using log4net.Core;
+using log4net.Util;
+
+namespace log4net.Layout.Pattern
+{
+	/// <summary>
+	/// Write the assembly's description attribute to the output
+	/// </summary>
+	/// <remarks>
+	/// <para>
+	/// Writes the <see cref="LoggingEvent.Domain"/> to the output writer.
+	/// </para>
+	/// </remarks>
+	/// <author>Mark Mitchell</author>
+    internal sealed class AsmDescPatternConverter : PatternLayoutConverter 
+	{
+		/// <summary>
+		/// Write the assembly description attribute to the output
+		/// </summary>
+		/// <param name="writer"><see cref="TextWriter" /> that will receive the formatted result.</param>
+		/// <param name="loggingEvent">the event being logged</param>
+		/// <remarks>
+		/// <para>
+		/// Writes the <see cref="LoggingEvent.Domain"/> to the output <paramref name="writer"/>.
+		/// </para>
+		/// </remarks>
+		override protected void Convert(TextWriter writer, LoggingEvent loggingEvent)
+		{
+            if (loggingEvent.Repository != null)
+            {
+                Assembly asm = loggingEvent.Repository.Assembly;
+                if (asm != null)
+                {
+                    object[] attrs = asm.GetCustomAttributes(typeof (AssemblyDescriptionAttribute), true);
+                    if (attrs != null && attrs.Length == 1 && attrs[0] is AssemblyDescriptionAttribute)
+                    {
+                        AssemblyDescriptionAttribute desc = (AssemblyDescriptionAttribute)attrs[0];
+                        writer.Write(desc.Description);
+                    } else
+                    {
+                        writer.Write(SystemInfo.NotAvailableText);
+                    }
+                }
+            } else
+            {
+                writer.Write(SystemInfo.NotAvailableText);
+            }
+		}
+	}
+}
Index: src/Layout/Pattern/AsmVersionPatternConverter.cs
===================================================================
--- src/Layout/Pattern/AsmVersionPatternConverter.cs	(revision 0)
+++ src/Layout/Pattern/AsmVersionPatternConverter.cs	(revision 0)
@@ -0,0 +1,66 @@
+#region Copyright & License
+//
+// Copyright 2001-2005 The Apache Software Foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#endregion
+
+using System;
+using System.Reflection;
+using System.Text;
+using System.IO;
+
+using log4net.Core;
+using log4net.Util;
+
+namespace log4net.Layout.Pattern
+{
+	/// <summary>
+	/// Write the assembly's version to the output
+	/// </summary>
+	/// <remarks>
+	/// <para>
+	/// Writes the <see cref="LoggingEvent.Domain"/> to the output writer.
+	/// </para>
+	/// </remarks>
+	/// <author>Mark Mitchell</author>
+    internal sealed class AsmVersionPatternConverter : PatternLayoutConverter 
+	{
+		/// <summary>
+		/// Write the assembly's version to the output
+		/// </summary>
+		/// <param name="writer"><see cref="TextWriter" /> that will receive the formatted result.</param>
+		/// <param name="loggingEvent">the event being logged</param>
+		/// <remarks>
+		/// <para>
+		/// Writes the <see cref="LoggingEvent.Domain"/> to the output <paramref name="writer"/>.
+		/// </para>
+		/// </remarks>
+		override protected void Convert(TextWriter writer, LoggingEvent loggingEvent)
+		{
+            if (loggingEvent.Repository != null)
+            {
+                Assembly asm = loggingEvent.Repository.Assembly;
+                if (asm != null)
+                {
+                    writer.Write(asm.GetName().Version);
+                } writer.Write(SystemInfo.NotAvailableText);
+                
+            } else
+            {
+                writer.Write(SystemInfo.NotAvailableText);
+            }
+		}
+	}
+}
\ No newline at end of file
Index: src/Layout/PatternLayout.cs
===================================================================
--- src/Layout/PatternLayout.cs	(revision 505391)
+++ src/Layout/PatternLayout.cs	(working copy)
@@ -796,7 +796,7 @@
 		/// </remarks>
 		static PatternLayout()
 		{
-			s_globalRulesRegistry = new Hashtable(45);
+			s_globalRulesRegistry = new Hashtable(47);
 
 			s_globalRulesRegistry.Add("literal", typeof(LiteralPatternConverter));
 			s_globalRulesRegistry.Add("newline", typeof(NewLinePatternConverter));
@@ -871,6 +871,9 @@
 
 			s_globalRulesRegistry.Add("w", typeof(UserNamePatternConverter));
 			s_globalRulesRegistry.Add("username", typeof(UserNamePatternConverter));
+		    
+		    s_globalRulesRegistry.Add("asm-desc", typeof(AsmDescPatternConverter));
+		    s_globalRulesRegistry.Add("asm-ver", typeof(AsmVersionPatternConverter));
 		}
 
 		#endregion Static Constructor
Index: src/Repository/ILoggerRepository.cs
===================================================================
--- src/Repository/ILoggerRepository.cs	(revision 505391)
+++ src/Repository/ILoggerRepository.cs	(working copy)
@@ -17,7 +17,7 @@
 #endregion
 
 using System;
-
+using System.Reflection;
 using log4net;
 using log4net.ObjectRenderer;
 using log4net.Core;
@@ -104,6 +104,15 @@
 		/// </remarks>
 		string Name { get; set; }
 
+
+	    /// <summary>
+	    /// The assembly from which this logger repository was based on (if applicable)
+	    /// 
+        /// Returns <code>null</code> if this logger repository is based on a name instead
+	    /// </summary>
+        Assembly Assembly { get; set; }
+	    
+
 		/// <summary>
 		/// RendererMap accesses the object renderer map for this repository.
 		/// </summary>
Index: src/Repository/LoggerRepositorySkeleton.cs
===================================================================
--- src/Repository/LoggerRepositorySkeleton.cs	(revision 505391)
+++ src/Repository/LoggerRepositorySkeleton.cs	(working copy)
@@ -17,7 +17,7 @@
 #endregion
 
 using System;
-
+using System.Reflection;
 using log4net.ObjectRenderer;
 using log4net.Core;
 using log4net.Util;
@@ -53,6 +53,7 @@
 		private event LoggerRepositoryConfigurationResetEventHandler m_configurationResetEvent;
 		private event LoggerRepositoryConfigurationChangedEventHandler m_configurationChangedEvent;
 		private PropertiesDictionary m_properties;
+        private Assembly m_assembly;
 
 		#endregion
 
@@ -115,6 +116,15 @@
 			get { return m_name; }
 			set { m_name = value; }
 		}
+	    
+	    /// <summary>
+	    /// Assembly on which this repository is based
+	    /// </summary>
+	    virtual public Assembly Assembly
+	    {
+            get { return m_assembly; }
+            set { m_assembly = value; }
+	    }
 
 		/// <summary>
 		/// The threshold for all events in this repository