Machine Readable Concept Model

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Purpose

An  723592007 | MRCM attribute range reference set|  allows attributes to be associated with a valid value range for a given SNOMED CT content type and rule strength. The range of each attribute is defined using an Expression Constraint. This expression constraint represents the set of concepts, expressions, or concrete values that may be used as the value of the given attribute.1  

The  723592007 | MRCM attribute range reference set| also provides a summary of the concept model rule associated with each attribute (including all valid domains and the given range) using an Expression Constraint representation. This attribute rule can be completely auto-generated by combining information from the  723604009 | MRCM attribute domain reference set| and the  723592007 | MRCM attribute range reference set| . 

Data Structure

A  723592007 | MRCM attribute range reference set|  is structured as shown in the following table.

Field

Data type

Purpose

Mutable

Part of Primary Key

id

UUID

A 128 bit unsigned integer, uniquely identifying this reference set member.
Different versions of a reference set member share the same id but have different effectiveTimes. This allows a reference set member to be modified or made inactive (i.e. removed from the active set) at a specified time.

NO

YES (Full/Snapshot) 

effectiveTime

Time

The inclusive date or time at which this version of the identified reference set member became the current version.
The current version of this reference set member at time T is the version with the most recent effectiveTime prior to or equal to time T.

YES

YES (Full)

Optional (Snapshot) 

active

Boolean

The state of the identified reference set member as at the specified effectiveTime.
If active=1 (true) the reference set member is part of the current version of the set, if active=0 (false) the reference set member is not part of the current version of the set.

YES

NO

moduleId

SCTID

Identifies the SNOMED CT module that contains this reference set member as at the specified effectiveTime.

The value must be a subtype of <a href="http://snomed.info/id/900000000000443000" title="900000000000443000 | Module |" class="external-link conf-macro output-inline" rel="nofollow" data-hasbody="false" data-macro-name="concept"> <span style="color: #606060;" class="sctid">900000000000443000</span> <span style="color: #00ccff;" class="sctpipe">|</span> <span style="color: #000000;" class="sctid">Module</span><span style="color: #00ccff;" class="sctpipe">|</span></a> within the metadata hierarchy.

YES

NO

refsetId

SCTID

Identifies the reference set to which this reference set member belongs.
In this case, set to a subtype of 723592007 | MRCM attribute range reference set|

NO

NO

referenced ComponentId

SCTID

A reference to the SNOMED CT attribute concept to which the range defined by this member applies.

NO

NO

rangeConstraint

string

An expression constraint, which defines the set of concepts that may be used as the value of the given attribute (identified by referencedComponentId).

This string can be parsed using the ABNF syntax defined for the  Expression Constraint Language .

If ranges using concrete values are required, the Expression Constraint Language can be extended with the keyword "TYPE", by replacing the simpleExpressionConstraint rule with the following two rules: 

simpleExpressionConstraint  = [constraintOperator ws] eclFocusConcept / typeKeyword ws conceptReference
 typeKeyword = ("t"/"T") ("y"/"Y") ("p"/"P") ("e"/"E")

For example, the following range includes the set of all integers: TYPE  900000000000476001 | Integer|

Any descendant of <a href="http://snomed.info/id/900000000000459000" title="900000000000459000 | Attribute type |" class="external-link conf-macro output-inline" rel="nofollow" data-hasbody="false" data-macro-name="concept"> <span style="color: #606060;" class="sctid">900000000000459000</span> <span style="color: #00ccff;" class="sctpipe">|</span> <span style="color: #000000;" class="sctid">Attribute type</span><span style="color: #00ccff;" class="sctpipe">|</span></a> may be used as the type of an attribute range.

YES

NO

attributeRule

string

An Expression Constraint that captures the domain, range and cardinality constraints for the given attribute, rule strength and content type.
This string can be parsed using the ABNF syntax defined for the  Expression Constraint Language .
If ranges with concrete values are required, the Expression Constraint Language can be extended as described above (for rangeConstraint).

YES

NO

ruleStrengthId

SCTID

A subtype of 723573005 | Concept model rule strength| which specifies whether the given rule is mandatory (resulting in an error) or optional (resulting in a warning).

YES

NO

contentTypeId

SCTID

A subtype of 723574004 | Content type| which indicates the type of SNOMED CT content over which this rule applies.

YES

NO

Metadata

The following metadata hierarchy supports this reference set:

Reference Set Descriptor and Example Data

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 first four columns which are present in all release files are not shown. The omitted columns (id, effectiveTime, active, moduleId) are used in the same way in all referenced sets to support identification, versioning and packaging. They do not directly affect the specific features of a particular reference set or reference set type.
  • Reference set columns that contain SNOMED CT identifiers are expanded to show details of the concept or description referenced by that identifier. In some cases, the term is shown in the same column using the expression syntax, in other cases an additional column with a name suffix '_term' has been added. In the standard reference set files only the identifier is present in the column and there is no added column for the term. When using reference sets, the term and other details of the component are looked up from the relevant component release files.

Descriptor Template

The table below shows the reference set descriptor for a reference set that follows the  723592007 | MRCM attribute range reference set|  pattern. 

refsetId

referencedComponentId

attributeDescription

attributeType

attributeOrder

900000000000456007 | Reference set descriptor|

723592007 | MRCM attribute range reference set|

449608002 | Referenced component|

900000000000461009 | Concept type component|

0

900000000000456007 | Reference set descriptor|

723592007 | MRCM attribute range reference set|

723575003 | Range constraint|

707000009 | SNOMED CT parsable string|

1

900000000000456007 | Reference set descriptor|

723592007 | MRCM attribute range reference set|

723576002 | Attribute rule|

707000009 | SNOMED CT parsable string|

2

900000000000456007 | Reference set descriptor|

723592007 | MRCM attribute range reference set|

723573005 | Concept model rule strength|

900000000000461009 | Concept type component|

3

900000000000456007 | Reference set descriptor|

723592007 | MRCM attribute range reference set|

723574004 | Content type|

900000000000461009 | Concept type component|

4

Example Data

The table below shows some example rows from a reference set that follows the format of the  723592007 | MRCM attribute range reference set| .

refsetId

referencedComponentIdrangeConstraintattributeRule

ruleStrengthId

contentTypeId

723562003 | MRCM attribute range international reference set|

255234002 | After|


<<  404684003 |Clinical finding (finding)|  OR <<  71388002 |Procedure (procedure)|


(<<  404684003 |Clinical finding (finding)|  OR <<  272379006 |Event (event)| ): [0..*] { [0..*]  255234002 |After|  = (<<  404684003 |Clinical finding (finding)|  OR <<  71388002 |Procedure (procedure)| )}

723597001 | Mandatory concept model rule|

  723596005 | All SNOMED CT content|

723562003 | MRCM attribute range international reference set|

408729009 | Finding context|

<<  410514004 | Finding context value (qualifier value)|


<<  413350009 |Finding with explicit context (situation)| : [0..*] { [0..1]  408729009 |Finding context|  = <<  410514004 |Finding context value (qualifier value)| }

723597001 | Mandatory concept model rule|

  723596005 | All SNOMED CT content|

723562003 | MRCM attribute range international reference set|

272741003 | Laterality|

<<  182353008 | Side (qualifier value)|


<<  91723000 |Anatomical structure (body structure)| : [0..1]  272741003 |Laterality|  = <<  182353008 |Side (qualifier value)|

723597001 | Mandatory concept model rule|

  723596005 | All SNOMED CT content|  


Footnotes
Ref
Notes
1 If ranges including concrete values (such as integers or strings) are required, the Expression Constraint Language can be extended, as described for rangeConstraint in the Data Structure section on this page.
2 Please note that the 723574004 | Content type| hierarchy is designed using 'universal restriction' logic. The hierarchy may therefore appear to be 'upside down'. However, it was designed in this way because if an MRCM rule applies to 723596005 | All SNOMED CT content| then it also applies to the Content Types that are a supertype of this - including 723594008 | All precoordinated SNOMED CT content| and 723595009 | All postcoordinated SNOMED CT content| .
 

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