[Bug 3519] Define 'weakened' wildcards

http://www.w3.org/Bugs/Public/show_bug.cgi?id=3519

           Summary: Define 'weakened' wildcards
           Product: XML Schema
           Version: 1.1 only
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: needsDrafting
          Severity: normal
          Priority: P2
         Component: Structures: XSD Part 1
        AssignedTo: cmsmcq@w3.org
        ReportedBy: cmsmcq@w3.org
         QAContact: www-xml-schema-comments@w3.org


To ease the pain currently imposed by the Unique Particle Attribution
constraint, change the rules for interpreting content models to
specify that wildcards and elements have different priorities;
when an element in the input matches both a wildcard and an
element particle in the content model, the element particle wins --
and there is no violation of the UPA constraint.

This proposal has been discussed off and on for a long time, but
there appears not to be a separately trackable Bugzilla entry for
it, so I am adding this one now.  Related issues include
bug 2867 (negative wildcards), bug 2544 (interaction between wildcards
and element-declarations consistent), and possibly others.

The WG agreed in principle on the technical solution to be adopted
here (namely: yes, declare that competition between an element
particle and a wildcard particle is not a violation of UPA) 
at its ftf meeting of November 2005 in Toronto.

Received on Thursday, 20 July 2006 22:10:49 UTC