The TS_BITMAPCACHE_CAPABILITYSET_REV2 structure is used to advertise support for Revision 2 Bitmap Caches (see [MS-RDPEGDI] section 3.1.1.1.1). This capability is only sent from client to server. In addition to specifying bitmap caching parameters in the Revision 2 Bitmap Cache Capability Set, a client MUST also support the MemBlt and Mem3Blt Primary Drawing Orders (see [MS-RDPEGDI] sections 2.2.2.2.1.1.2.9 and 2.2.2.2.1.1.2.10 respectively) in order to receive the Cache Bitmap (Revision 2) Secondary Drawing Order (see [MS-RDPEGDI] section 2.2.2.2.1.2.3).