Source:http://linkedlifedata.com/resource/umls/id/C0022752
NCI: A database or other collection of knowledge expressed in a formal knowledge representation language.,MSH: Collections of facts, assumptions, beliefs, and heuristics that are used in combination with databases to achieve desired results, such as a diagnosis, an interpretation, or a solution to a problem (From McGraw Hill Dictionary of Scientific and Technical Terms, 6th ed).