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When the contained classes are elsewhere fully defined in the RIM core MIF, attributes and annotations are declared that normally might map to Entities and Entity Properties respectively in LexEVS.  However, the attribute tagged values will sometimes bear references to a data type tag or a concept domain tag, both of which are defined in the vocabulary core MIF and correlate to the the code systems also defined there.  We could pre-correlate this relationship by persisting this as a LexEVS association making the attribute a first class entity, or we could leave it as a property and post-correlate the relationship for interested users through a series of LexEVS calls. 

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Some instances of contained classes are otherwise defined as concepts in code systems designated by the definingVocabulary tag in the RIM core MIF.  This is another relationship between files that will need consideration for definition in LexEVS. 

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