2.2.1 application/vq-rtcpxr+xml
The XML schema in this section uses four namespaces:
Elements defined in the ms-rtcp-metrics.v2 namespace are named with a "v2" prefix. Similarly, elements defined in the ms-rtcp-metrics.v3 namespace are named with a "v3" prefix and elements defined in the ms-rtcp-metrics.v4 namespace are named with a "v4" prefix. Elements that are not named with a "v2" or a "v3" or "v4" prefix are defined in the ms-rtcp-metrics namespace.