[Bug 27668] New: [xslt 3.0] (@a, @b) is not streamable


            Bug ID: 27668
           Summary: [xslt 3.0] (@a, @b) is not streamable
           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

It seems that the expression (@a, @b) is not guaranteed streamable.

The general streamability rules apply. Both operands have U=transmission,
P=striding, S=motionless. The adjusted usage and adjusted sweep are the same as
U and S. Under 1.c.ii both operands are potentially consuming. Therefore 2.c.ii
applies, and the expression as a whole is roaming and free-ranging.

There seems to be a need for another subrule of 2.c to say that if all the
"potentially consuming" operands are motionless and if all have the same
posture P, then the expression is motionless with posture P.

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Received on Thursday, 18 December 2014 23:09:05 UTC