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                                    << Access >> - Public contents of the target package that can by accessed by the source package 
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                                    << Bind >> - Source object that instantiates the target template using the given actual parameters 
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                                    << Call>> - Source operation that invokes the target operation 
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                                    << Derive >> - Source object that can be computed from the target 
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                                    << Extend >> - (Use Case/Class) Target object extends the behavior of the source object at the given extension point 
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                                    << Friend>> - Source object that has special visibility towards the target 
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                                    << Import >> - Everything declared public in the target object becomes visible to the source object, as if it were part of the source object definition 
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                                    << Include >> - (Use Case/Class) Inclusion of the behavior of the first object into the behavior of the client object, under the control of the client object 
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                                    << Instantiate >> - Operations on the source class create instances of the target class 
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                                    << Refine >> - The target object has a greater level of detail than the source object 
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                                    << Trace >> - Historical link between the source object and the target object 
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                                    << Use >> - Semantics of the source object are dependent on the semantics of the public part of the target object 
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                                    << ejb-ref >> - (Java only) Used in Java Generation to create references to EJBs (entity beans and session beans) for generating the deployment descriptor 
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                                    << sameFile >> - (Java only) Used in Java Generation to generate Java classes of visibility protected or private within a file corresponding to a class of visibility public