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[Bug 28678] New: fn:nilled first signature needs to be able to return empty sequence

From: <bugzilla@jessica.w3.org>
Date: Fri, 22 May 2015 20:32:30 +0000
To: public-qt-comments@w3.org
Message-ID: <bug-28678-523@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=28678

            Bug ID: 28678
           Summary: fn:nilled first signature needs to be able to return
                    empty sequence
           Product: XPath / XQuery / XSLT
           Version: Working drafts
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Functions and Operators 3.1
          Assignee: mike@saxonica.com
          Reporter: pwalmsley@datypic.com
        QA Contact: public-qt-comments@w3.org

The first signature of fn:nilled (with no parameters) doesn't allow it to
return the empty sequence, but it seems it should allow it.  If $arg is
omitted, and the context item is a node but not an element node, it should
return the empty sequence according to the rules described.

e.g.  $mydoc/foo/@bar/nilled()

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