A 900000000000512005 | Query specification type reference set| allows a serialised query to represent the membership of a subset of SNOMED CT components. A query contained in the reference set is run against the content of SNOMED CT to produce a subset of concepts, descriptions or relationships. The query is referred to an intensional definition of the subset. It can be run against future releases of SNOMED CT to generate an updated set of subset members.
The members of the resulting subset may also be represented in an enumerated form as a Simple reference set . An enumerated representation of a subset is referred to as an extensional definition.
A Query specification reference set is a String reference set containing query that represent intensional definitions of subsets of components. The result of running the query is an extensional representation of the subset of components which can be represented as a Simple reference set. Its structure is shown in the following table.
|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.
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:
The table below shows the descriptor that defines the structure of the 900000000000512005 | Query specification type reference set| pattern.
In the example below, "serialised query 1" is a text string that can be used to generate members for Reference set1, which is a simple member reference set (without any additional fields within its member records).