Index: C:/workspace/woden/woden/src/org/apache/woden/internal/wsdl20/Constants.java
===================================================================
--- C:/workspace/woden/woden/src/org/apache/woden/internal/wsdl20/Constants.java	(revision 469146)
+++ C:/workspace/woden/woden/src/org/apache/woden/internal/wsdl20/Constants.java	(working copy)
@@ -17,6 +17,8 @@
 //TODO - check if any constants copied from w4j can be deleted
 package org.apache.woden.internal.wsdl20;
 
+import java.net.URI;
+
 import javax.xml.namespace.QName;
 
 /**
@@ -129,6 +131,14 @@
     public static final String NMTOKEN_OTHER = "#other";
     public static final String NMTOKEN_ELEMENT = "#element";
     
+    //Message Exchange Patterns
+    public static final URI MEP_URI_IN_ONLY = 
+        URI.create("http://www.w3.org/2006/01/wsdl/in-only");
+    public static final URI MEP_URI_ROBUST_IN_ONLY = 
+        URI.create("http://www.w3.org/2006/01/wsdl/robust-in-only");
+    public static final URI MEP_URI_IN_OUT = 
+        URI.create("http://www.w3.org/2006/01/wsdl/in-out");
+    
     /* Constants representing the values of the properties used to 
      * configure the Woden runtime (i.e. different to WSDL 2.0 properties).
      * These typically describe the standards, APIs, etc, supported by this