Purpose

A

Concept
t 447250001|Complex map type reference set| ShowFormat inline

enables representation of maps where each

Gloss
SpacePreSpace truefalse t SNOMED CT concept

may map to one or more codes in a

Gloss
PreSpace false t target scheme

. The type of

Gloss
SpacePreSpace truefalse t reference set

supports the general set of mapping data required to enable a

Gloss
SpacePreSpace truefalse t target code

to be selected at run-time from a number of alternate codes. It supports

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SpacePreSpace truefalse t target code

selection by accommodating the inclusion of machine readable rules and/or human readable advice. An

Concept
t 609331003|Extended map type reference set| ShowFormat inline

adds an additional field to allow categorization of maps.

Data structure

A Complex map reference set is an Integer - Integer -

Specref
RefType (data type) t String

-

Specref
RefType (data type) t String

-

Specref
RefType (data type) t String

-

Gloss
SpacePreSpace truefalse t Component

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PreSpace false t reference set

. The pattern is currently used for the map to ICD-9-CM. Its structure is as shown in the following table, with one exception - the table includes an additional field (

Specref
RefType (field) t mapCategoryId

) which is not used for this type of map.

An Extended map reference set follows the same pattern but adds one additional column. It is an Integer - Integer -

Specref
RefType (data type) t String

-

Specref
RefType (data type) t String

-

Specref
RefType (data type) t String

-

Gloss
PreSpace false t Component

-

Gloss
SpacePreSpace truefalse t Component

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SpacePreSpace truefalse t reference set

and this pattern is currently used for maps to ICD-10. Its structure is shown in the following table.

...

Values for

Specref
RefType (field) t mapGroup

are allocated on a sequential basis (for each

Specref
RefType (field) t refsetId

and

Specref
RefType (field) t referencedComponentId

combination) during authoring starting at 1. However, distributed

Specref
RefType (field) t mapGroup

are not necessarily sequential, as some

Specref
RefType (field) t mapGroup

may be created and removed during a mapping process between releases. For maps where each

Gloss
SpacePreSpace truefalse t SNOMED CT concept

only maps to at most one of a group of alternate

Gloss
PreSpace false t target codes

, the mapGroup field are usually be set to '1'.

...

Where both fields are populated, and a vendor's system is capable of processing a machine readable rule, this should take priority over the human readable advice. Where neither field is populated, a vendor's system should allow the end-user to select the appropriate

Gloss
SpacePreSpace truefalse t target code

from the alternates.

For more details on this topic in relation to the ICD-10 maps released as part of the SNOMED CT International Edition please see the ICD-10 Mapping Technical Guide

Mapping Rule Specifications

The specific grammar and content of the rules for resolving complex mapping cases depends on the nature of the 

Gloss
SpacePreSpace truefalse t target code

system or classification. In general, each map is accompanied by a rule which is tested against other data and can be evaluated to return one of the following values:

...

Detailed definitions of the mapping rules used forms part of individual specifications for maps to particular 

Gloss
SpacePreSpace truefalse t target code

systems and classifications. This will initially be provided separately and will accompany the release of the relevant mapping files. For example, the set of rules used for mapping to 

Gloss
SpacePreSpace truefalse t ICD-10

are included in the ICD-10 Mapping Technical Guide.

Metadata

The following metadata supports this

Gloss
PreSpace false t reference set

:

Scg expression
Border ridge
900000000000454005 |Foundation metadata concept| 900000000000455006 |Reference set| 447250001 |Complex map type reference set| 609331003 |Extended map type reference set|

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

Descriptor Templates

The tables below examples of the descriptors for specific

Gloss
SpacePreSpace truefalse t reference sets

that follow the

Concept
t 447250001|Complex map type reference set| ShowFormat inline

and

Concept
t 609331003|Extended map type reference set| ShowFormat inline

patterns.

...

Example Data

Related Links

• ICD-10 Mapping Technical Guide

...