Deriving reference sets

Deriving reference sets from simple type reference sets

Deriving reference sets means that you use an existing reference set to create a new reference set. There are three different options

• Description: Creates a description based reference set from the reference set members. It contains all descriptions of the members in the original reference set.
• Relationship: Creates a relationship based reference set from the reference set members. It contains all relationships that exist between the members of the original reference set. For example, if a parent concept and its child concept are both members of the original reference set, the derived reference set will contain a member for this relationship. This relationship will be comprised of two concepts, and the relationship type (is a).
• Duo: Create two reference sets, one description based, and one relationship based.

Right-click on the simple-type reference set that you want to use, and select Derive to simple type reference set from the context menu. Enter a name for the new reference set and select one of the options, hit Finish.

Deriving a description based reference set

You can open the new reference set from the reference set view. The screenshot below shows a reference set that was derived from the Cardiology reference set. The concept IDs of the referenced components are displayed.

Derived reference set showing relationships between members of Cardiology reference set

The screenshot below shows a reference set that contains all descriptions of the Cardiology reference set.

Derived reference set containing all descriptions of the Cardiology reference set members

Deriving reference sets from simple maps

The SNOMED CT components in a simple type map can be used to create a new reference set. Right-click on the simple map set that you want to use, and select Derive to simple type reference set from the context menu. Enter a name for the new reference set and select one of the options, hit Finish.

Deriving reference sets from simple maps

There are three different options for deriving reference sets from simple maps: Components, Components and subtypes, and Trio.

The screenshot below shows the original simple map.

Vaccine simple map

Deriving a components reference set from simple map

Components: Creates a reference set with the SNOMED CT concepts that are referenced in the simple map.

Derived components reference set

Deriving a components and subtypes reference set from simple map

Components and subtypes: Creates a reference set with the SNOMED CT concepts that are referenced in the simple map. In addition to the actual referenced components in the mapping, all of the subtypes of these concepts are also included. This is also referred to as transitive closure reference set from mapping.

Derived components and subtypes reference set

Deriving a trio of reference sets from simple map

Trio: Creates three reference sets.

• The ‘concept reference set’ contains all SNOMED CT components that are referenced in the map. Trio is added to the name of the new reference set (e.g. Vaccine trio)
• The ‘description reference set’ contains all descriptions of the SNOMED CT concepts that are referenced in the map. "Descriptions" is added to the name (e.g. Vaccine trio - description). The icon decorator indicates that it contains descriptions.
• The ‘relationship reference set’ is comprised of the relationships that exist between the SNOMED CT concepts that are referenced in the map. Relationships is added to the name of the new reference set (e.g. Vaccine trio - relationships). The icon decorator indicates that it contains relationships.

Derived reference set trio