Alternatively, you may use the resource provided by the Alias Context "Data Classes API" to obtain a listing of classes for a standard. The /standards resource content provides the resource for retrieving a standard's Data Classes API in the Alias element's Name attribute as “/standards/{asset-id}/classes”. The {asset-id} is replaced by the OID for the specific standard being requested. Within the results retrieved from the “/standards/{asset-id}/classes” request you can find the resources for retrieving the class domains or the class variables in the Alias element. Again, the {asset-id} in the resource is replaced by the OID for your desired class.
The following XML shows the results of a request for the FA domain variables for SDTM 1.5.