UMLS

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*Brief introduction (2006) ([[media:umlsintro.pdf|PDF]])
*Brief introduction (2006) ([[media:umlsintro.pdf|PDF]])
*UMLS Metathesaurus [http://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/columns_data_elements.html#sb_0 Columns & Data elements]
*UMLS Metathesaurus [http://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/columns_data_elements.html#sb_0 Columns & Data elements]
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**[http://www.nlm.nih.gov/research/umls/metaa1.html UMLS list of sources]
+
**[http://www.ncbi.nlm.nih.gov/books/NBK9676/ UMLS Reference Manual]
***MSH MESH
***MSH MESH
***MTHICD9 ICD-9-CM Entry Terms (UMLS)
***MTHICD9 ICD-9-CM Entry Terms (UMLS)

Revision as of 02:29, 18 February 2011

In the current Metathesaurus, there are three sources of co-occurrence data: 
MEDLINE, AI/RHEUM, and CCPSS. From MEDLINE, co-occurrence data was computed for concepts 
that were designated as principal or main points in the same journal article i.e., 
the co-occurrence counts do not include articles in which either or both of the concepts 
were present and indexed in MEDLINE but not designated as main points. 
(A concept is considered to be a main point if the * is attached to the main heading
or any of its subheadings.)
RRF columns - fields]
In the current Metathesaurus, there are three sources of co-occurrence data: 
MEDLINE, AI/RHEUM, and CCPSS. From MEDLINE, co-occurrence data was computed for concepts 
that were designated as principal or main points in the same journal article i.e., 
the co-occurrence counts do not include articles in which either or both of the concepts 
were present and indexed in MEDLINE but not designated as main points. 
(A concept is considered to be a main point if the * is attached to the main heading
or any of its subheadings.)
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