This page lists UMLS Metathesaurus data elements and traces them back to the specific source data that populates them.
VSAB: LCH_NW_2013
File |
Description |
---|---|
lcsh-mesh_read.doc | Description of the project and files |
lchs-mesh_sample.txt | Sample data |
File |
Description |
---|---|
lcsh.mrc | MARC 21 format authority file, with linking data to MSH strings |
Identifier |
Origin |
---|---|
CODE |
Value of the 010 tag (Library of Congress Control Number), subfield $a |
SAUI |
Not Applicable |
SCUI |
Same as CODE |
SDUI |
Not Applicable |
Term Type (TTY) |
Description |
Origin |
---|---|---|
PT | Preferred Term |
CODE = Value of the 010 tag (Library of Congress Control Number) STR = Value of 150 or 151 tag (Heading Topical Term or Geographic Name Heading); subfield delimiters are replaced with "--". SCUI = Same as CODE SUPPRESS = N |
XM |
Cross Mapping Set |
This data is added during Metathesaurus source processing. |
Attribute Name (ATN) |
Origin |
---|---|
FROMRSAB |
This data is added during Metathesaurus source processing. |
FROMVSAB |
This data is added during Metathesaurus source processing. |
MAPSETRSAB |
This data is added during Metathesaurus source processing. |
MAPSETVERSION |
This data is added during Metathesaurus source processing. |
MAPSETVSAB | This data is added during Metathesaurus source processing. |
MTH_MAPFROMCOMPLEXITY | This data is added during Metathesaurus source processing. |
MTH_MAPFROMEXHAUSTIVE | This data is added during Metathesaurus source processing. |
MTH_MAPSETCOMPLEXITY | This data is added during Metathesaurus source processing. |
MTH_MAPTOCOMPLEXITY | This data is added during Metathesaurus source processing. |
MTH_MAPTOEXHAUSTIVE |
This data is added during Metathesaurus source processing. |
TORSAB |
This data is added during Metathesaurus source processing. |
TOVSAB |
This data is added during Metathesaurus source processing. |
SOS |
This data is added during Metathesaurus source processing. |
REL | RELA Inverse RELA |
Origin |
---|---|---|
RQ |
mapped_to/mapped_from |
A subset of data found in the 750 (Topical Mappings) tag: Where FROMEXPR and TOEXPR are simple expressions, mapping data is redundantly represented as relationships in MRREL.RRF. See the Mappings (MRMAP) section below for details. |
MRMAP entries are created by processing data in the MARC 750 (Topical Mappings) tag, where:
MRMAP Field |
Origin |
---|---|
MAPSUBSETID |
Value is always "1". Used in conjunction with MAPRANK value to allow for representation when a given FROMEXPR has more than one TOEXPR value in a simple map. This data condition is found in the source where there is more than one "750" tag, and no subfield $8. |
MAPRANK |
Value is an integer; incremented when an LCH record has multiple "750" tags, without $8 subfields. This data condition indicates a simple one to many mapping from LCH to MSH (i.e. there is no implied "AND"). The MAPRANK field is used in conjunction with MAPSUBSETID to allow for representation when a given FROMEXPR has more than one TOEXPR value in a simple map. |
FROMID |
Identifier of the LCH_NW source entity being mapped from; for LCH_NW, this is always a single SCUI, with the same value as the FROMEXPR |
FROMEXPR |
Expression of the LCH_NW source entity being mapped from; LCH_NW, this is always a single SCUI, with the same value as the FROMEXPR |
FROMTYPE |
SCUI |
REL |
RQ (related and possibly synonymous) |
RELA |
mapped_to |
TOID |
Identifier of the MSH target entity being mapped to; this identifier is assigned during Metathesaurus source processing. |
TOEXPR |
The expression of the MSH target entity being mapped to, derived from "750" tag values where subfield $8 is populated, indicating a "field link/sequence number." Includes qualifier information extracted from the $x subfield, if present Note: the original data in this field is populated by MSH strings. Where possible, the strings have been translated to MSH identfiers. In a small number of cases, the string provided did not correspond to a current MSH string, and these entries were dropped during Metathesaurus source processing. |
TOTYPE |
Value is "SDUI" or "BOOLEAN_EXPR_SDUI" based on the absence or presence of $8 subfields. |