Purpose
A 446609009 | Simple type reference set| allows a set of componentsto be specified for inclusion or exclusion for a specified purpose. This type of reference retrepresents an extensional definition of a subset of SNOMED CT components. Thus it can be used to fully enumerate a subset of concepts, descriptionsor relationships.
See also Query specification reference set, which can be used to represent an intensional definition of a subset of SNOMED CT components. In an intensional definition, the members of the subset are specified by rules rather than by enumerations (e.g. all subtypes of a specified concepts).
Reference Set Data Structure
A Simple reference setdoes not have any addition fields.
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Field |
Data type |
Purpose |
|---|---|---|
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A 128 bit unsigned Integer (data type), uniquely identifying this 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. |
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The inclusive date or time at which this version of the identified reference set memberbecame the current version. The current version of this reference set memberat time T is the version with the most recent effectiveTime (field) prior to or equal to time T . |
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The state of the identified reference set memberas at the specified effectiveTime (field) . If active (field) = 1 (true) the reference set memberis part of the current version of the set, if active (field) = 0 (false) the reference set memberis not part of the current version of the set. |
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Identifies the SNOMED CT modulethat contains this reference set memberas at the specified effectiveTime (field) . The value must be a subtypeof 900000000000443000 | Module (core metadata concept)| within the metadata hierarchy. |
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Identifies the reference setto which this reference set memberbelongs. In this case, set to 900000000000456007 | Reference set descriptor| |
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A reference to the SNOMED CT componentto be included in the reference set. |
Metadata
Simple References Sets are subtypesof 446609009 | Simple type reference set| in the metadata hierarchy.
Descriptor template
The table below shows the descriptor for a specific reference setsthat follows the 446609009 | Simple type reference set| pattern.
|
refsetId |
referencedComponentId (Referenced component) |
attributeDescription (Attribute description) |
attributeType (Attribute type) |
attributeOrder (Attribute order) |
|---|---|---|---|---|
|
0 |
Note: The table above omits 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 table above also shows the termfrom one of the descriptionsassociated with each of the identified concept. The release file only contains the identifier.
Simple reference set example
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