In addition to RDMHeader and RDMQuery, the file rdm.h provides definitions and functions for the following auxiliary objects. See the rdm.h file in PortalServer-base/sdk/rdm/include directory for details.
RDMRequest
RDMResponse
RDMServer
RDMView
RDMViewHits
RDMViewOrder
RDMTaxonomy
RDMClassification
RDMSchema