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

Gloss

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 String

Specref

RefType	(data type)
t	String

Gloss

PreSpace	false
t	reference set

containing query

Specref

RefType	(field)
t	query

that represent intensional definitions of subsets of

Gloss

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.

Field

Data type

Purpose

id (field)

UUID (data type)

A 128 bit unsigned Integer (data type), uniquely identifying this

Gloss

t	reference set member

.

Different versions of a reference set member share the same id (field) but have different effectiveTime (field). This allows a reference set member to be modified or made active (field) (i.e. removed from the active set) at a specified time.

effectiveTime (field)

Time (data type)

The inclusive date or time at which this version of the identified

Gloss

t	reference set member

became the current version.

The current version of this

Gloss

t	reference set member

at time T is the version with the most recent effectiveTime (field) prior to or equal to time T .

active (field)

Boolean (data type)

The state of the identified

Gloss

t	reference set member

as at the specified effectiveTime (field) .

If active (field) = 1 (true) the

Gloss

t	reference set member

is part of the current version of the set, if active (field) = 0 (false) the

Gloss

t	reference set member

is not part of the current version of the set.

moduleId (field)

SCTID (data type)

Identifies the

Gloss

t	SNOMED CT module

that contains this

Gloss

t	reference set member

as at the specified effectiveTime (field) .

The value must be a

Gloss

t	subtype

of

Concept

t	900000000000443000\|Module (core metadata concept)\|

within the metadata

Gloss

t	hierarchy

.

refsetId (field)

SCTID (data type)

Identifies the

Gloss

t	reference set

to which this

Gloss

t	reference set member

belongs.

In this case, set to a subtype of

Concept

t	900000000000512005\|Query specification type\|

referencedComponentId (field)

SCTID (data type)

The identifier ( refsetId (field)) of the

Gloss

t	reference set

for which members are to be generated.

query

String (data type)

The serialised query that can be used to (re-)generate the

Gloss

t	reference set

members.

A standard syntax for use in these queries is currently under development and is due for publication in late 2014.

...

The following metadata in the "Foundation metadata

Gloss

t	concept

"

Gloss

t	hierarchy

supports this

Gloss

t	reference set

:

...

Concept

t	900000000000454005\|Foundation metadata concept\|

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

Gloss

PreSpace	false
t	concept

"

Gloss

PreSpace	false
t	hierarchy

supports this

Gloss

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

...

Concept

t	900000000000455006\|Reference set\|

...

Concept

t	900000000000512005\|Query specification type\|

...

Concept
t 900000000000513000|Simple query specification|

...

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

refsetId	referencedComponentId	attributeDescription	attributeType	attributeOrder

Concept

t	900000000000456007\|Reference set descriptor\|

Concept

t	900000000000512005\|Query specification type reference set\|

Concept

t	900000000000514006\|Generated reference set\|

Concept

t	900000000000461009\|Concept type component\|

0

Concept

t	900000000000456007\|Reference set descriptor\|

Concept

t	900000000000512005\|Query specification type reference set\|

Concept

t	900000000000515007\|Query\|

Concept

t	900000000000465000\|String\|

1

Note: The tables above omit the initial four columns of data present in the release file. These follow the standards versioning pattern id (field), effectiveTime (field), active (field), active (field). Additionally, to aid understanding, the tables above also show the

Gloss

t	term

from one of the

Gloss

t	descriptions

associated with each of the identified

Gloss

t	concept

. The release file only contains the

Gloss

t	identifier

.

...

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

refsetId

referencedComponentId

query

Concept

t	900000000000513000\|Simple query specification\|

Concept

t	\|Target reference set\|

Serialized text of the query ...

...

The specification of the query

Gloss

t	language

has yet to be defined / selected, but it should be capable of:

Selecting
Gloss
t concepts
using primary fields, subsumption testing,
Gloss
t relationships
, relationshipGroup (field), set operators (
Gloss
t union
,
Gloss
t intersection
, excludes), and lexical query ;
Selecting
Gloss
t descriptions
,
Gloss
t relationships
and
Gloss
t reference sets
using similar mechanisms;
Calculation of values for the
Gloss
t reference set
's extended fields. Identifying the version of the syntax and any
Gloss
t language
syntax variations.
Queries that support definitions for terminologies other than
Gloss
t SNOMED CT
should also be supported. For example, queries to link or include codes in ICD-10, ICD-11, ICPC and
Gloss
t LOINC
.

...

Gloss

t	SNOMED CT concepts

Scg expression
< 19829001 \|disorder of lung\|: 116676008 \|associated morphology\| = << 79654002 \|edema\|

References

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

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