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Medical Subject Headings

ASCII MeSH. Descriptor Data Elements

Descriptor records in ASCII MeSH contain the data elements listed below. The list includes all the descriptor data in ELHILL file MeSH, plus some additional information.* Note that not every record has every data element. Sample record.

Element Element Name
ANANNOTATION
AQALLOWABLE TOPICAL QUALIFIERS
CATSHCATALOGING SUBHEADINGS LIST NAME *
CXCONSIDER ALSO XREF
DADATE OF ENTRY
DCDESCRIPTOR CLASS
DEDESCRIPTOR ENTRY VERSION
DSDESCRIPTOR SORT VERSION
DXDATE MAJOR DESCRIPTOR ESTABLISHED
ECENTRY COMBINATION
PRINT ENTRYENTRY TERM, PRINT **
ENTRYENTRY TERM, NON-PRINT **
FXFORWARD CROSS REFERENCE (SEE ALSO REFERENCE)
GMGRATEFUL MED NOTE *
HNHISTORY NOTE
M##BACKFILE POSTINGS
MHMESH HEADING
MH_THMESH HEADING THESAURUS ID [= MHTH in ELHILL MESH]
MNMESH TREE NUMBER
MRMAJOR REVISION DATE
MSMESH SCOPE NOTE
N1CAS TYPE 1 NAME
OLONLINE NOTE
PAPHARMACOLOGICAL ACTION
PIPREVIOUS INDEXING
PMPUBLIC MESH NOTE
PXPRE EXPLOSION
RECTYPERECORD TYPE [= RY in ELHILL MESH ]
RHRUNNING HEAD, MESH TREE STRUCTURES
RNCAS REGISTRY/EC NUMBER
RRRELATED CAS REGISTRY NUMBER
STSEMANTIC TYPE *
UIUNIQUE IDENTIFIER

* = not in ELHILL MeSH

M## INCLUDES MED, M94, M90, M85, M80, M75, and M66 data elements.

** ENTRY and PRINT ENTRY terms may have several subfields, with each subfield entry separated from another by a bar. A final string "map" indicates which value goes with which subfield. For example,

PRINT ENTRY = Avian Sarcoma|T050|T191|NON|EQV|NLM (1994)|930624|abbcdef

In the final string of characters - 'abcdeef' - each letter corresponds to a specific subfield and indicates the position of the subfield and any position repeats:

Character Subfield
athe term itself
bSEMANTIC TYPE*
cLEXICAL TYPE*
dSEMANTIC RELATION*
eTHESAURUS ID
fDATE
sSORT VERSION
vENTRY VERSION

* = not in ELHILL MeSH