2.1.1.3 RTSP Mappings

When Windows Media DRM-ND is used with RTSP, the feature tag "com.microsoft.wmdrm-nd" is used to identify support for Windows Media DRM-ND. This feature tag can be included on the RTSP "Require" header in any RTSP request sent by the receiver or by the transmitter. It MUST be included in the "Supported" header in RTSP requests and responses.

If the transmitter or Receiver receives an RTSP request that includes the "Require" header, it MUST recognize "com.microsoft.wmdrm-nd" as one of the features that it supports.

The following sections specify how the license retrieval, data transfer, license update, and revocation list update procedures are mapped to the RTSP protocol [RFC2326].