A 900000000000496009 |Simple map reference set|allows representation of simple maps between SNOMED CT concepts and values in other code systems. No constraints are put on the number of coding schemes supported, the number of codes within a particular scheme mapped to by a single SNOMED CT concept or the number of SNOMED CT concepts mapping to a particular code. However, this type of reference set is usually only appropriate where there is a close "one-to-one" mapping between SNOMED CT concepts and coded values in another code system.
A Simple map reference set is a String reference set used to represent one-to-one maps between SNOMED CT concepts and codes in another terminology, classification or code system. Its structure is shown in the following table.
Table 5.2.9-1: Simple map reference set - Data structure
|Part of Primary Key|
|NO||YES (Full /Snapshot)|
The inclusive date or time at which this version of the identified reference set member became the current version.
Note: In distribution files the effectiveTime should follow the short ISO date format (YYYYMMDD) and should not include the hours, minutes, seconds or timezone indicator.
In this case, a subtype descendant of: 900000000000496009 |Simple map type reference set|
The equivalent code in the other terminology, classification or code system.
Table 5.2.9-2: Simple Map Reference Sets in the Metadata Hierarchy
Notes on the tables used to show descriptors and examples
The reference set example tables on this page have been revised as follows to aid clarity and understanding:
Table 5.2.9-3: Refset Descriptor rows for
referencedComponentId (Referenced component)
attributeDescription (Attribute description)
attributeType (Attribute type)
attributeOrder (Attribute order)
Table 5.2.9-4: Sample Content from a Simple Map Reference Set
referencedComponentId (Map source concept)
mapTarget (Scheme value)