AVSTR — C&M ofAudio/Video Streams

I am going to implement OMG Control and Management of Audio/Video Streams
specification. We used IONA's implementation: Orbix MediaStreams but we
are not fully satisfied with it.
I have some questions:
1. StreamCtrl has a 'Status' property which is 'seqflowStatus' - probably
sequence of flowStatus structures. But there is no such typedef in the IDL
specification.
2. StreamCtrl has alse A_parties and B_parties sequences. The same
problem.