Language Reference Set

Whenever a new description is added in an extension, the language preferences associated with that description must be specified. This is done by adding rows to a language reference set to indicate whether each description is | acceptable| or | preferred| in the given language or dialect.

Attributes

As previously mentioned, all reference sets use six common attributes. In addition to these, a | Language type reference set| also includes an acceptabilityId. The table below explains how each of these attributes is populated in a | Language type reference set| .

Table: Summary of language reference set attributes

In the image below, two rows from the are shown. Note that these rows specify French Canadian language preferences for the concept .

Please note the following:

• The id column shows a UUID that has been uniquely generated for each refset member.

• The moduleId indicates that these refset members belong to the .

• The refsetId indicates that both members are part of the .

Module Dependency Reference Set

Every extension must contain at least one module, which is used to organize the extension content. The dependencies that the extension modules have on other modules (including on the | SNOMED CT core module| and the | SNOMED CT model component module| ) must be specified in the extension. This is done by adding new members to the | Module dependency reference set| . Each new versioned release of the extension requires a new version to be created for each extension member of the | Module dependency reference set| .

Attributes

As previously mentioned, all reference sets use six common attributes. In addition to these, a | Module dependency reference set| also includes a sourceEffectiveTime and targetEffectiveTime. The table below explains how each of these attributes is populated in a | Module dependency reference set| .

Table: Summary of module dependency reference set attributes

The table below shows three rows from the in the 20170301 US Edition of SNOMED CT. Please note that the SCTIDs in the moduleId and referenceComponentId columns have been replaced with their preferred terms for improved readability.

Table: Module dependency reference set rows

Please note the following:

• The first row states that the 20170731 version of the source module is dependant on the 20170731 version of the target module .

• The second row states that the 20170901 version of the source module is dependant on the 20170731 version of the target module .

• The third row states that the 20170901 version of the source module is dependant on the 20170731 version of the

All extensions must specify their extension module dependencies and language preferences. In this section, we describe the essential reference sets that support this.

• Language Reference Set

• Module Dependency Reference Set