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diff --git a/sandbox/sebastien/java/shell/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/EndpointReference.java b/sandbox/sebastien/java/shell/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/EndpointReference.java
new file mode 100644
index 0000000000..f9edbe6e87
--- /dev/null
+++ b/sandbox/sebastien/java/shell/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/EndpointReference.java
@@ -0,0 +1,165 @@
+/*
+ * 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.assembly;
+
+import java.io.Serializable;
+
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Represents an endpoint reference. An SCA reference can reference service endpoints in a
+ * number of ways. Target names, autowire, configured bindings. The endpoint reference
+ * captures the result of specifying one of these things.
+ *
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.asclient
+ */
+public interface EndpointReference extends Base, PolicySubject, Cloneable, Serializable {
+
+    /**
+     * Status of the endpoint reference resolution
+     */
+    enum Status {
+        NOT_CONFIGURED, // Not configured
+        RESOLVED_BINDING, // The endpoint reference is configured with a binding
+        AUTOWIRE_PLACEHOLDER, // Autowire to be performed
+        WIRED_TARGET_NOT_FOUND, // Wire target not found
+        WIRED_TARGET_FOUND_READY_FOR_MATCHING, // Wire target found and ready to be resolved to an endpoint
+        WIRED_TARGET_FOUND_AND_MATCHED, // Wire target found and resolved to an endpoint
+        WIRED_TARGET_IN_BINDING_URI // SCA target specified by the binding uri
+    };
+
+    /**
+     * Get the structural URI of the reference binding
+     * @return The structural URI of the reference/binding
+     */
+    String getURI();
+
+    /**
+     * Set the structural URI of the reference binding
+     * @param uri &lt;componentURI&gt;#reference-binding(referenceName/bindingName)
+     * or &lt;componentURI&gt;#reference(referenceName) if binding is not present
+     *
+     */
+    void setURI(String uri);
+
+    /**
+     * Supports endpoint reference cloning
+     *
+     * @return endpointReference
+     * @throws CloneNotSupportedException
+     */
+    Object clone() throws CloneNotSupportedException;
+
+    /**
+     * Get the component model object
+     *
+     * @return component
+     */
+    Component getComponent();
+
+    /**
+     * Set the  component model object
+     *
+     * @param component the component for the endpoint
+     */
+    void setComponent(Component component);
+
+    /**
+     * Get the source component reference model object
+     *
+     * @return reference the source component reference  for the endpoint
+     */
+    ComponentReference getReference();
+
+    /**
+     * Set the source component reference model object
+     *
+     * @param reference
+     */
+    void setReference(ComponentReference reference);
+
+    /**
+     * Get the resolved reference binding
+     *
+     * @return binding the resolved reference binding
+     */
+    Binding getBinding();
+
+    /**
+     * Set the resolved reference binding
+     *
+     * @param binding the resolved reference binding
+     */
+    void setBinding(Binding binding);
+
+    /**
+     * Get the target endpoint
+     *
+     * @return endpoint the target endpoint
+     */
+    Endpoint getTargetEndpoint();
+
+    /**
+     * Set the target endpoint model object
+     *
+     * @param endpoint the target endpoint
+     */
+    void setTargetEndpoint(Endpoint targetEndpoint);
+
+    /**
+     * Returns the interface contract defining the interface
+     *
+     * @return the interface contract
+     */
+    InterfaceContract getComponentReferenceInterfaceContract();
+
+    /**
+     * Get the reference callback endpoint that
+     * represents that target endpoint to which callback
+     * messages will be directed
+     *
+     * @return callbackEndpoint the reference callback endpoint
+     */
+    Endpoint getCallbackEndpoint();
+
+    /**
+     * Set the reference callback endpoint
+     *
+     * @param callbackEndpoint the reference callback endpoint
+     */
+    void setCallbackEndpoint(Endpoint callbackEndpoint);
+
+    /**
+     * Rather than relying on combinations of unresolved flags and 
+     * other data we maintain a status enumeration
+     * 
+     * @return status
+     */
+    Status getStatus();
+
+    /**
+     * Rather than relying on combinations of unresolved flags and 
+     * other data we maintain a status enumeration
+     * 
+     * @param status the new status
+     */
+    void setStatus(Status status);
+}