Jeroen, All,
Sorry to sound like a broken record, but multi-layer topology descriptions were never the aim of the first schema document.
I'm not sure that I agree with this.
And we have in our charter that we will provide that schema as a deliverable, with a followup multi-layer schema deliverable. I'm not completely sure about the formal process of rechartering, but that's what we'd have to do then.
My read of the charter is that the "base" schema doesn't have specific parameters for e.g. SONET, Ethernet, etc and that those are to be defined later. But I think that the "base" schema should have the scaffolding to relate various layers. I don't think that is goes against the charter in word or intent. I also think it makes it more valuable. best, martin