[Bug 29081] New: [xslt 3.0] Use of reserved namespaces in extensions


            Bug ID: 29081
           Summary: [xslt 3.0] Use of reserved namespaces in extensions
           Product: XPath / XQuery / XSLT
           Version: Last Call drafts
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: XSLT 3.0
          Assignee: mike@saxonica.com
          Reporter: mike@saxonica.com
        QA Contact: public-qt-comments@w3.org
  Target Milestone: ---

Tests maps-901a to maps-901e assume that a processor is required to reject
calls on the map:new() function.

Now, as it happens, current Saxon releases support this function in order to
ease transition from earlier working drafts.

The question therefore arises whether this is non-conformant.

If the function is allowed at all, then it is an extension function, and the
question is whether extension functions are permitted in a reserved namespace.

Section 5.1.3 on reserved namespaces says that they can be used for some
purposes (names of literal result elements and attributes) and not others
(names of stylesheet-defined variables and functions). Extension functions are
not mentioned.

Do we want to disallow use of reserved namespaces in the names of extension
functions (and presumably extension elements?) If so, we should say so,
otherwise we need to remove these tests.

Allowing extension functions in these namespaces allows vendors to implement a
function defined in one version of the W3C specs in a processor that aims for
conformance with a different version. This can help interoperability in some
ways, and hinder it in others, so the right answer is not obvious.

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Received on Monday, 24 August 2015 20:06:53 UTC