Excerpt
Purpose

...

The

Concept

...

t	705109006 Code to expression type reference set

is designed to enable associations between

...

codes in another code

...

system

Gloss

t	(other-codes)
t:	other-codes

...

and

Gloss

t	SNOMED CT concepts

, where the following constraints apply:

Some of

...

the
Gloss
t other-codes
t: other-codes
cannot be mapped to an individual SNOMED

...

CT
Gloss
t concept
.
Licensing conditions (or other considerations) prevent addition of new SNOMED CT concepts to represent the same meaning as

...

the
Gloss
t other-codes
t: other-codes
.

...

The
Gloss
t other-codes
t: other-codes
can be logically defined using

...

the
Gloss
t SNOMED concept model
to represent the same

...

meaning
Gloss
t (sufficiently defined)
or a similar though less specific

...

meaning
Gloss
t (primitive)
.
Other requirements similar for those applicable to mapping may also apply including:
1. An indication of the degree of correlation between

...

1. the
  Gloss
  t other-code
  t: other-codes
  and the SNOMED CT expression.
2. An indication of whether

...

1. the
  Gloss
  t other-code
  t: other-codes
  was created before any single concept representation of that meaning in SNOMED CT or whether the single concept representation in SNOMED CT predated the creation of the association.

Data Structure

The general approach to the above requirements is to associate each of

...

the

Gloss

t	other-codes
t:	other-codes

with a representation of the same logic based definition as would have been applied to a SNOMED CT concept with that meaning. However, since

...

the

Gloss

t	other-code
t:	other-codes

are not identified by

...

an

Specref

RefType	data type
t	SCTID

, the logical definition cannot be represented

...

using

Gloss

t	defining relationships

. There are two potential approaches to this, one would be to use a general purpose description logic language (e.g.

...

Gloss

t	OWL

) and the other is to use

...

a

Gloss

t	SNOMED CT expression

to represent each definition.

...

The

Concept

ShowParts	term
t	705109006 Code to expression type reference set

is designed to support the expression-based approach.

...

Caption label

CapId	simple-map-reference-set-data-structure
CapType	Table

Code to Expression Reference Set - Data structure

Refset spec table

Size	fs7
RefsetType	Code to Expression Reference Set

Metadata

The following metadata

Gloss

PreSpace	false
t	hierarchy

supports this

Gloss

PreSpace	false
t	reference set

:

Caption label

CapId	simple-map-reference-sets-in-the-metadata-hierarchy
CapType	Table

Code to Expression Reference Set in the Metadata Hierarchy

Scg expression

Border	ridge

  900000000000454005 |Foundation metadata concept|
		900000000000455006 |Reference set|
				705109006 |Code to expression type reference set|

Excerpt Include

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

Descriptor template and examples

The tables below show the descriptors that define examples of

Gloss

PreSpace	false
t	reference sets

that follow the

Concept

t	705109006 \|Code to expression type reference set (foundation metadata concept)\|
ShowFormat	inline

pattern.

Caption label

CapId	refset-descriptor-rows-for
CapType	Table

Refset Descriptor rows for a Code to Expression Reference Set

900000000000454005 | Foundation metadata concept | 900000000000455006 | Reference set |

refsetId

referencedComponentId (Referenced component)

attributeDescription (Attribute description)

attributeType (Attribute type)

attributeOrder (Attribute order)

Concept

t	900000000000456007\|Reference set descriptor\|

Concept

t	705109006 \|Code to expression type reference set\|

Concept

t	449608002 \|Referenced component\|

Concept

t	900000000000461009\|Concept type component\|

0

Concept

t	900000000000456007\|Reference set descriptor\|

Field

Data type

Purpose

id

Specref

RefType	data type
t	UUID

A 128 bit unsigned integer, uniquely identifying the reference set member.

Specref

t	effectiveTime

Specref

RefType	data type
t	Time

Specifies the inclusive date at which this change becomes effective.

Specref

t	active

Specref

RefType	data type
t	Boolean

Specifies whether the member's state was active or inactive from the nominal release date specified by the effectiveTime field.

Specref

t	moduleId

Specref

RefType	data type
t	SCTID

Identifies the member version's module. Set to a child of

Concept

ShowParts	term
t	900000000000443000 Module

in the metadata hierarchy.

Specref

t	refsetId

Specref

RefType	data type
t	SCTID

Identifies the reference set and must be a subtype of

Concept

ShowParts	term
t	705109006 Code to expression type reference set

which is located in the metadata hierarchy as shown below:

Concept

t

Concept

t

705109006 |Code to expression type reference set|

Specrefconcept

t	referencedComponentId

Specref

RefType	data type
t	SCTID

A reference to a SNOMED CT metadata concept referring to the code system containing the

Gloss

t	other-codes
t:	other-codes

. This is a subtype of

Concept

ShowParts	term
t	705113004 Terminology system

.

Specref

t	mapTarget

Specref

RefType	data type
t	String

The

Gloss

t	other-code
t:	other-codes

associated with the SNOMED CT expression.

	900000000000505001 \|Map target\|

Concept

t	900000000000465000\|String\|

1

Concept

t	900000000000456007\|Reference set descriptor\|

Concept

t	705109006 \|Code to expression type reference set\|

Concept

t	706999006 \|Expression\|

Concept

t	706999006 \|Expression\|

2

Concept

t	900000000000456007\|Reference set descriptor\|

Concept

t	705109006 \|Code to expression type reference set\|

Concept

t	705109006 \|Code to expression type reference set\|

Concept

t	734867002 \|Expression definition status\|

Concept

t	900000000000461009\|Concept type component\|

3

Concept

t	900000000000456007\|Reference set descriptor\|

Concept

t	705109006 \|Code to expression type reference set\|

Concept

t	447247004 \|SNOMED CT source code to target map code correlation value\|

Concept

t	900000000000461009\|Concept type component\|

4

Concept

t	900000000000456007\|Reference set descriptor\|

Concept

t	705109006 \|Code to expression type reference set\|

Concept

t	705116007 \|Original code system source for linked content value\|

Concept

t	900000000000461009\|Concept type component\|

5

Refset Examples

Caption label

CapId	sample-content-from-a-simple-map-reference-set
CapType	Table

Sample Content from a Code to Expression Type Reference Set

refsetId

referencedComponentId

mapSource

expression

definitionStatusId

correlationId

contentOriginId

Concept

t	705110001 \|LOINC Term to Expression reference set\|

Concept

t	705114005 \|LOINC Code System\|

48023-6

363787002:246093002=720113009,370134009=123029007,246501002=702675006,704327008=122592007,370132008=117363000,704319004=50863008,704318007=705057003

Concept

t	900000000000073002 \|Sufficiently defined by necessary conditions definition status\|

Concept

t	447557004 \|Exact match map from SNOMED CT source code to target code\|

Concept

t	705117003 \|Originally in LOINC\|

Concept

t	705110001 \|LOINC Term to Expression reference set\|

Concept

t	705114005 \|LOINC Code System\|

51406-7

363787002:704323007=123027009,704321009=718500008,704327008=122575003,704322002=64033007,704318007=118544000,370132008=30766002,704324001=706939009

Concept

t	900000000000073002 \|Sufficiently defined by necessary conditions definition status\|

Concept

t	447557004 \|Exact match map from SNOMED CT source code to target code\|

Concept

t	705117003 \|Originally in LOINC\|

Concept

t	705110001 \|LOINC Term to Expression reference set\|

Concept

t	705114005 \|LOINC Code System\|

51406-7

363787002:370134009=123029007,704327008=122592007,704318007=118556004,370132008=30766002,704319004=50863008,246093002=4546008

Concept

t	900000000000073002 \|Sufficiently defined by necessary conditions definition status\|

Concept

t	447557004 \|Exact match map from SNOMED CT source code to target code\|

Concept

t	705117003 \|Originally in LOINC\|

Concept

t	705110001 \|LOINC Term to Expression reference set\|

Concept

t	705114005 \|LOINC Code System\|

59878-9

363787002:370134009=123029007,704327008=258459007,704318007=118556004,246093002=273948005,370132008=30766002,704319004=31773000

Concept

t	900000000000073002 \|Sufficiently defined by necessary conditions definition status\|

Specref

t	expression

Specref

RefType	data type
t	String

A

Gloss

t	SNOMED CT expression

that represents the SNOMED CT definition of the

Gloss

t	other-code
t:	other-codes

. This expression may be a

Gloss

t	stated
GlosTerm	stated view

or

Gloss

t	inferred view

of the definition provided that documentation of each identified reference set specifies the view provided.

The expression must conform to the syntax defined in the SNOMED CT Compositional Grammar - Specification and Guide (http://snomed.org/scg).

Specref

t	definitionStatusId

Specref

RefType	data type
t	SCTID

Indicates whether or not the expression contains a sufficient definition of the

Gloss

t	other-code
t:	other-codes

in the mapTarget field.
Possible values are the following subtypes of

Concept

t	900000000000444006 Definition status

:

Concept

t	900000000000074008 \| Necessary but not sufficient concept definition status \| 900000000000073002 \| Sufficiently defined concept definition status \|

Specref

t	correlationId

Specref

RefType	data type
t	SCTID

The correlation between the SNOMED CT expression and the

Gloss

t	other-code
t:	other-codes

. Possible values are the following subtypes of

Concept

t	447247004 SNOMED CT source code to target map code correlation value

:

Conceptt 447559001 | Broad to narrow map from SNOMED CT source code to target code |

Concept

t

447557004 |Exact match map from SNOMED CT source code to target code|

447558009 | Narrow to broad map from SNOMED CT source code to target code | 447560006 | Partial overlap between SNOMED CT source code and target code |

When these values are applied to this reference set type, the phrase "SNOMED source code" is interpreted as meaning "SNOMED expression" and "target code" refers to the

Gloss

t	other-code.
t:	other-codes

.

Specref

t	contentOriginId

Specref

RefType	data type
t	SCTID

Indication of whether concept was initially in one of the terminologies (SNOMED CT or

Gloss

t	other-codes
t:	other-codes

) and added to the other as part of mapping or was in both terminologies at the outset. Values are subtype children of Conceptt705116007 Original code system source for linked content value

Concept

t	705117003 \|Originally in LOINC\|

Concept

t	705110001 \|LOINC Term to Expression reference set\|

Concept

t	705114005 \|LOINC Code System\|

51921-5363787002:704318007=118539007,370134009=123029007,704326004=703765007,704327008=122592007,370132008=30766002,704319004=50863008,246093002=387067003

Concept

t	900000000000073002 \|Sufficiently defined by necessary conditions definition status\|

Concept

t	447557004 \|Exact match map from SNOMED CT source code to target code\|

Concept

t	705117003 \|Originally in LOINC\|

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Refset Examples

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Descriptor template and examples

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