NEW ISSUE: Correlation property names are odd, and the space of optionsis not extensible.

(resending with correct prefix, for anyone with a filter - sorry.)
Target: Web services binding specification, WD 02

Description:
Current allowed names for "correlation" are "RequestMsgIDtoCorrelID",
and "RequestCorrelIDToCorrelID".  These names are long, and yet oddly
shortened.  Further, a "None" option is defined, it it is not clear
whether this is meant to foreclose vendor specific notions of
correlation, or to flag that a vendor specific correlation is defined
elsewhere.

Proposal:
For the two defined correlation approaches, drop the redundant parts of
the label, the "ToCorrelID", and "Request" parts, and remove
abbreviations on the remainder, to yield "MessageID", and "CorrelationID".

Change the definition of the schema element to allow any QName here, so
as to provide a way for vendors to identify their own correlation
customizations.