Subject: Media types: version parameter?
All, > -----Original Message----- > From: email@example.com [mailto:firstname.lastname@example.org] On > Behalf Of Bill Parducci > Sent: Thursday, February 23, 2012 8:29 PM > To: XACML TC > Subject: [xacml] Minutes for XACML TC Meeting 23 Fenruary 2012 > > Media types > Ray got doc started, Robin from Oasis offered to help. Need to get > types defined to move forward. Ray asked if there were XACML version > dependencies on the types. Hal noted this was not necessary for XML > but noted that we need to mechanism for JSON is separate, Ray's > initial types should cover these cases. Even though an XACML policy/request/response includes a namespace that indicates the version used, there may be value in a separate version identification mechanism. A good example is content negotiation . One client can request a version 2.0 response from the PDP, whereas a different client can request a version 3.0 response. The same PDP could answer both clients in their preferred manner. This makes it a lot easier to evolve a PDP, since not all clients need to be upgraded right away. Thanks, Ray  http://en.wikipedia.org/wiki/Content_negotiation