IETF MediaCtrl Mixer 1.0 (20110104) This is the schema of the Mixer control package. It defines request, response and notification elements for mixing. The schema namespace is urn:ietf:params:xml:ns:msc-mixer This import brings in the framework attributes for conferenceid and connectionid. This type is extended by other (non-mixed) component types to allow attributes from other namespaces.