The Service Group Definition is the top level of the customizable Definition files. Linked to it are all of the SSA-NAME3 Services, Algorithms and Matching Scheme definitions which will be used by applications.

It is possible to have multiple Service Group definitions, and this might be desirable for different systems or different countries.

There is normally nothing to customize at the Service Group level. The user can change the name of the Service Group, and the Matching Schemes to which it points, but this is not recommended. For details on Service Group Definition, see the

Service Group Definition

section.