NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.
UMLS® Reference Manual [Internet]. Bethesda (MD): National Library of Medicine (US); 2009 Sep-.
Table 9.
Mappings (File = MRMAP.RRF)
| Col. | Description |
|---|---|
| MAPSETCUI | Unique identifier for the UMLS concept which represents the whole map set. |
| MAPSETSAB | Source abbreviation (SAB) for the provider of the map set. |
| MAPSUBSETID | Map subset identifier used to identify a subset of related mappings within a map set. This is used for cases where the FROMEXPR may have more than one potential mapping (optional). |
| MAPRANK | Order in which mappings in a subset should be applied. Used only where MAPSUBSETID is used. (optional) |
| MAPID | Unique identifier for this individual mapping. Primary key of this table to identify a particular row. |
| MAPSID | Source asserted identifier for this mapping (optional). |
| FROMID | Identifier for the entity being mapped from. This is an internal UMLS identifier used to point to an external entity in a source vocabulary (represented by the FROMEXPR). When the source provides such an identifier, it is reused here. Otherwise, it is generated by NLM. The FROMID is only unique within a map set. It is not a pointer to UMLS entities like atoms or concepts. There is a one-to-one correlation between FROMID and a unique set of values in FROMSID, FROMEXPR, FROMTYPE, FROMRULE, and FROMRES within a map set. |
| FROMSID | Source asserted identifier for the entity being mapped from (optional). |
| FROMEXPR | Entity being mapped from - can be a single code/identifier /concept name or a complex expression involving multiple codes/identifiers/concept names, Boolean operators and/or punctuation |
| FROMTYPE | Type of entity being mapped from. |
| FROMRULE | Machine processable rule applicable to the entity being mapped from (optional) |
| FROMRES | Restriction applicable to the entity being mapped from (optional). |
| REL | Relationship of the entity being mapped from to the entity being mapped to. |
| RELA | Additional relationship label (optional). |
| TOID | Identifier for the entity being mapped to. This is an internal identifier used to point to an external entity in a source vocabulary (represented by the TOEXPR). When the source provides such an identifier, it is reused here. Otherwise, it is generated by NLM. The TOID is only unique within a map set. It is not a pointer to UMLS entities like atoms or concepts. There is a one-to-one correlation between TOID and a unique set of values in TOSID, TOEXPR, TOTYPE, TORULE, TORES within a map set. |
| TOSID | Source asserted identifier for the entity being mapped to (optional). |
| TOEXPR | Entity being mapped to - can be a single code/identifier/concept name or a complex expression involving multiple codes/identifiers/concept names, Boolean operators and/or punctuation. |
| TOTYPE | Type of entity being mapped to. |
| TORULE | Machine processable rule applicable to the entity being mapped to (optional). |
| TORES | Restriction applicable to the entity being mapped to (optional). |
| MAPRULE | Machine processable rule applicable to this mapping (optional). |
| MAPRES | Restriction applicable to this mapping (optional). |
| MAPTYPE | Type of mapping (optional). |
| MAPATN | The name of the attribute associated with this mapping [not yet in use] |
| MAPATV | The value of the attribute associated with this mapping [not yet in use] |
| CVF | The Content View Flag is a bit field used to indicate membership in a content view. |
- Table 9. [Mappings (File = MRMAP.RRF)]. - UMLS® Reference ManualTable 9. [Mappings (File = MRMAP.RRF)]. - UMLS® Reference Manual
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