Excerpt

Purpose

The

Concept

ShowParts	term
t	705109006 Code to expression type reference set

is designed to enable associations between code 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 the
  Gloss
  t other-code
  t: other-codes
  and the SNOMED CT expression.
2. An indication of whether 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.

Field

Data type

Purpose

Gloss

t	Mutable
LinkType	subtle

Part of Primary Key

id

Specref

RefType	(data type)
t	UUID

A 128 bit unsigned

Specref

RefType	(data type)
t	Integer

, uniquely identifying this

Gloss

t	reference set member

.

Different versions of a reference set member share the same

Specref

RefType	(field)
t	id

but have different

Specref

RefType	(field)
t	effectiveTime

. This allows a reference set member to be modified or made

Specref

RefType	(field)
t	active

(i.e. removed from the active set) at a specified time.

NO

YES (Full/Snapshot)

Specref

RefType	(field)
t	effectiveTime

Specref

RefType	(data type)
t	Time

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

Gloss

Space	true
t	reference set member

became the current version.

The current version of this

Gloss

Space	true
t	reference set member

at time T is the version with the most recent

Specref

RefType	(field)
t	effectiveTime

prior to or equal to time T .

YES

YES (Full)

Optional (Snapshot)

Specref

RefType	(field)
t	active

Specref

RefType	(data type)
t	Boolean

The state of the identified

Gloss

Space	true
t	reference set member

as at the specified

Specref

RefType	(field)
t	effectiveTime

.

If

Specref

RefType	(field)
t	active

= 1 (true) the

Gloss

Space	true
t	reference set member

is part of the current version of the set, if

Specref

RefType	(field)
t	active

= 0 (false) the

Gloss

Space	true
t	reference set member

is not part of the current version of the set.

YES

NO

Specref

RefType	(field)
t	moduleId

Specref

RefType	(data type)
t	SCTID

Identifies the

Gloss

Space	true
t	SNOMED CT module

that contains this

Gloss

Space	true
t	reference set member

as at the specified

Specref

RefType	(field)
t	effectiveTime

.

The value must be a

Gloss

Space	true
t	subtype

of

Concept

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

within the metadata

Gloss

t	hierarchy

.

YES

NO

Specref

RefType	(field)
t	refsetId

Specref

RefType	(data type)
t	SCTID

Identifies the

Gloss

Space	true
t	reference set

to which this

Gloss

Space	true
t	reference set member

belongs.

In this case, set to as subtype descendant of:

Concept

ShowParts	term
t	705109006 Code to expression type reference set

NO

Specref

RefType	(field)
t	referencedComponentId

Specref

RefType	(data type)
t	SCTID

A reference to the

Gloss

Space	true
t	SNOMED CT component

to be included in the

Gloss

t	reference set

.

NO

Specref

t	mapTarget

Specref

RefType	data type
t	String

The

Gloss

t	other-code
t:	other-codes

to/from which the concept is mapped.

NO

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).

YES

NO

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

:

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

YES

NO

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

:

Scg expression

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

.

YES

NO

Specref

t	contentOriginId

Specref

RefType	data type
t	SCTID

Indication of whether the 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 subtypes of

Concept

t	705116007 Original code system source for linked content value

.

YES

NO

Search

Versions Compared

Old Version 8

New Version 9

Key

Purpose

Data Structure

Related Links

Search

Page History

Versions Compared

Old Version 8

New Version 9

Key

Purpose

Data Structure

Related Links