The value of the object tmnxOspfSrPfxSidSRMSSelected indicates whether or not the prefix SID received in the Prefix Range TLV is selected to be programmed. When there is however a SID for the same prefix received in a Prefix TLV, that prefix SID will be programmed and not the SRMS prefix SID. The object tmnxOspfSrPfxSidSRMSSelected is only applicable for SRMS prefix SID; tmnxOspfSrPfxSidSRMSSelected will return false in case the value of tmnxOspfSrPfxSidSRMS is false.
Sources for this description
Nokia networking MIB copies (LibreNMS/Observium Community)