Apply Mapping Reference Sets

This section considers the terminology services required to apply a mapping reference set to map data between SNOMED CT and another code system.

A mapping reference set is a reference set designed to support the process of mapping data from one code system, classification, or terminology to another code system, classification, or terminology.

In practice, these terminology services only get the relevant mapping data for the source concept (or source code in the other code system). The relevant mapping data may be one or more rows from the mapping reference set. If there are no rows, this implies that there are no maps from the source code. Otherwise, the rows of returned mapping data must be parsed using the rules applicable to the particular map to determine the result. These rules are found in the mapping guide associated with the particular map or mapping reference set type. For example, the mapping rules for the SNOMED International ICD-10 map are documented in the ICD-10 Mapping Technical Guide.

Services Required to Access Mapping Data

The following table shows a summary of the services required to support effective use of a mapping reference set.