I recant. Pigsonthewing was correct in his initial review. NCI Thesaurus ID is better to be treated as a pure Code string to be used across multiple Value Sets that NCI maintains mappings for <https://ncit.nci.nih.gov/ncitbrowser/ajax?action=create_src_vs_tree&nav_type=valuesets&mode=0> . In other words, the NCI Thesaurus ID Code string can be queried across multiple NCI URLs (sub databases) not only the NCIt database.
And it looks like we already created a property to hold the CUI Concept Unique Identifier <https://www.wikidata.org/wiki/Property:P2892> that NCImetathesaurus (NCIm) uses as the top level identifier in its grand terminology database which holds complete mappings. <https://ncim.nci.nih.gov/ncimbrowser/pages/concept_details.jsf?dictionary=NCI%20Metathesaurus&code=C0007465&type=all> So, in short, we are in excellent shape for cross references. -- Thad +ThadGuidry <https://plus.google.com/+ThadGuidry>
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