Purpose

A

Concept
t 900000000000512005|Query specification type reference set|

allows a serialised query to represent the membership of a subset of

Gloss
PreSpace false t SNOMED CT components

. A query contained in the

Gloss
PreSpace false t reference set

is run against the content of

Gloss
PreSpace false t SNOMED CT

to produce a subset of

Gloss
PreSpace false t concepts

,

Gloss
PreSpace false t descriptions

or

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PreSpace false t relationships

. The query is referred to an intensional definition of the subset. It can be run against future releases of

Gloss
PreSpace false t 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

Gloss
PreSpace false t Simple reference set

. An enumerated representation of a subset is referred to as an extensional definition.

Data structure

A

Gloss
PreSpace false t Query specification reference set

is a

Specref
RefType (data type) t String

Gloss
PreSpace false t reference set

containing

Specref
RefType (field) t query

that represent intensional definitions of subsets of

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PreSpace false t components

. The result of running the query is an extensional representation of the subset of

Gloss
PreSpace false t components

which can be represented as a

Gloss
PreSpace false t Simple reference set

. Its structure is shown in the following table.

Caption label
CapId query-specification-reference-set-data-structure CapType Table
Query specification reference set - Data structure

Refset spec table
Size fs7 RefsetType Query Specification Reference Set

Metadata

The following metadata in the "Foundation metadata

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"

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PreSpace false t hierarchy

supports this

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PreSpace false t reference set

:

Caption label
CapId hierarchy-of-foundation-metadata-concept CapType Table
Hierarchy of Foundation metadata concept

Scg expression
Border ridge
900000000000454005 |Foundation metadata concept| 900000000000455006 |Reference set| 900000000000512005 |Query specification type| 900000000000513000 |Simple query specification|

Excerpt Include
REUSE:Notes on Reference Set Example Tables REUSE:Notes on Reference Set Example Tables nopanel true

Descriptor Template

The table below shows the descriptor that defines the structure of the

Concept
t 900000000000512005|Query specification type reference set|

pattern.

Caption label
CapId descriptor-template-for-query-specification-reference-sets CapType Table
Descriptor Template for Query Specification Reference Sets

Example Data

In the example below, "serialised query 1" is a text string that can be used to generate members for

Gloss
PreSpace false t Reference set

1, which is a simple member

Gloss
PreSpace false t reference set

(without any additional fields within its member records).

Caption label
CapId example-rows-from-query-specification-reference-set CapType Table
Example rows from Query Specification Reference Set

References

• See Expression Constraint Language - Specification and Guide for details of the language used to specify intensional definitions of concept subsets.