Updated PE25 SAML Metadata Feature in SAMLConf

["Nick Ragouzis" <nickr@enosis.com>]

Updated to reflect consensus voiced on today's call.
Comments?
--Nick

Document: Conformance 

Description: Conformance document does not specify any requirements 
with respect to metadata. It is suggested that the conformance 
document be updated as follows. 
 
Change to Table 2: Feature Matrix
                      IdP    IdPLite   SP   SPLite   ECP
FEATURE
Metadata              OPT      OPT    OPT    OPT     N/A  


Change to Table 4: SAML Authority and Requester Matrix
                       AuthnAuth AttribAuth AuthZDcsnAuth Requester
FEATURE
Metadata                 OPT      OPT          OPT          OPT

New sub-section to Section 3 (Conformance):

3.6 Metadata 
Implementations claiming conformance to SAMLv2.0 may declare each 
operational mode's conformance to SAMLv2.0 Metadata [SAMLMeta] through 
election of the Metadata option.

With respect to each operational mode, such conformance entails the 
following:

* Implementing SAML metadata according to the extensible SAMLv2.0 
Metadata format in all cases where an interoperating peer has the option, 
as stated in SAMLv2.0 specifications, of depending on the existence of 
SAMLv2.0 Metadata. Electing the Metadata option has the effect of 
requiring such metadata be available to the interoperating peer.
The means of satisfying this requirement is detailed below.

* Referencing, consuming, and adherence to the SAML metadata, 
according to [SAMLMeta], of an interoperating peer when the known 
metadata relevant to that peer and the particular operation, and the 
current exchange, has expired or is no longer valid in cache, provided 
the metadata is available and is not prohibited by policy or the 
particular operation and that specific exchange.

* Election of the Metadata option requires the implementation offer, 
in addition to any other mechanism, the well-known location 
publication and resolution mechanism described in SAMLMeta.