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diff --git a/sandbox/sebastien/java/shell/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeEndpointReference.java b/sandbox/sebastien/java/shell/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeEndpointReference.java
new file mode 100644
index 0000000000..42e7328c0a
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+++ b/sandbox/sebastien/java/shell/modules/core-spi/src/main/java/org/apache/tuscany/sca/runtime/RuntimeEndpointReference.java
@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+package org.apache.tuscany.sca.runtime;
+
+import java.io.Serializable;
+
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
+
+/**
+ * The runtime representation of an endpoint reference
+ * @tuscany.spi.extension.asclient
+ */
+public interface RuntimeEndpointReference extends EndpointReference, Invocable, Serializable {
+    /**
+     * Set the reference binding provider for the endpoint reference
+     * @param provider The binding provider
+     */
+    void setBindingProvider(ReferenceBindingProvider provider);
+
+    /**
+     * Get the reference binding provider for the endpoint reference
+     * @return The binding provider
+     */
+    ReferenceBindingProvider getBindingProvider();
+    
+    /**
+     * Get the interface contract for the binding. This represents the data types that the binding
+     * protocol stack can process.
+     * @return The binding interface contract
+     */
+    InterfaceContract getBindingInterfaceContract();
+    
+    
+    /**
+     * Get the interface contract of the reference of the source component type, i.e., the
+     * componentType.reference.interfaceContract. This represents the data types that the 
+     * implementation code uses to make the outbound call.
+     * @return The source component type reference interface contract
+     */
+    InterfaceContract getComponentTypeReferenceInterfaceContract();   
+    
+    /**
+     * Check that endpoint reference has compatible interface at the component and binding ends. 
+     * The user can specify the interfaces at both ends so there is a danger that they won't be compatible.
+     * There is checking in the activator but of course endpoint references may not have a binding assigned
+     * until final resolution. 
+     */
+    public void validateReferenceInterfaceCompatibility();     
+    
+    boolean isOutOfDate();
+    void rebuild();
+    boolean isStarted();
+    
+    /**
+     * Retrieve the normalized WSDL contract relating to the input WSDL contract
+     * 
+     * @param interfaceContract
+     * @return
+     */
+    public InterfaceContract getGeneratedWSDLContract(InterfaceContract interfaceContract);
+}