2011/7/4 Alex Balashov abalashov@evaristesys.com:
I think part of the philosophical problem is that it is generally desirable to keep uniform PV coverage for components of various headers and URIs. So, the question would come up: if there is a PV for the RURI scheme, why not have PVs for the scheme of various other URIs, such as From, To, RPID, whatever, etc?
And suddenly we'd end up with a bunch more pollution of the PV space that consists of basically useless functionality for the sake of conceptual integrity. :-)
From a proxy point of view, inspecting the kind of schema of the RURI
(or of the topmost Route header) is important as routing rules could change depending on it.
Maybe there could be a generic URI transformation like {uri.schema}. However it would require (if I'm not wrong) Sip-Router to re-parse again the RURI just to get the schema.