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.

AN	ANNOTATION
AQ	ALLOWABLE TOPICAL QUALIFIERS
CATSH	CATALOGING SUBHEADINGS LIST NAME *
CX	CONSIDER ALSO XREF
DA	DATE OF ENTRY
DC	DESCRIPTOR CLASS
DE	DESCRIPTOR ENTRY VERSION
DS	DESCRIPTOR SORT VERSION
DX	DATE MAJOR DESCRIPTOR ESTABLISHED
EC	ENTRY COMBINATION
PRINT ENTRY	ENTRY TERM, PRINT **
ENTRY	ENTRY TERM, NON-PRINT **
FX	FORWARD CROSS REFERENCE (SEE ALSO REFERENCE)
GM	GRATEFUL MED NOTE *
HN	HISTORY NOTE
M##	BACKFILE POSTINGS
MH	MESH HEADING
MH_TH	MESH HEADING THESAURUS ID [= MHTH in ELHILL MESH]
MN	MESH TREE NUMBER
MR	MAJOR REVISION DATE
MS	MESH SCOPE NOTE
N1	CAS TYPE 1 NAME
OL	ONLINE NOTE
PA	PHARMACOLOGICAL ACTION
PI	PREVIOUS INDEXING
PM	PUBLIC MESH NOTE
PX	PRE EXPLOSION
RECTYPE	RECORD TYPE [= RY in ELHILL MESH ]
RH	RUNNING HEAD, MESH TREE STRUCTURES
RN	CAS REGISTRY/EC NUMBER
RR	RELATED CAS REGISTRY NUMBER
ST	SEMANTIC TYPE *
UI	UNIQUE 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:

a	the term itself
b	SEMANTIC TYPE*
c	LEXICAL TYPE*
d	SEMANTIC RELATION*
e	THESAURUS ID
f	DATE
s	SORT VERSION
v	ENTRY VERSION

* = not in ELHILL MeSH