http://www.w3.org/TR/xpath20/#dt-path-expression
Each operation E1/E2 is evaluated as follows: Expression E1 is
evaluated, and if the result is not a (possibly empty) sequence of
nodes, a type error is raised [err:XPTY0019]. Each node resulting from
the evaluation of E1 then serves in turn to provide an inner focus for
an evaluation of E2, as described in 2.1.2 Dynamic Context. The
sequences resulting from all the evaluations of E2 are combined as follows:
If every evaluation of E2 returns a (possibly empty) sequence of nodes,
these sequences are combined, and duplicate nodes are eliminated based
on node identity. The resulting node sequence is returned in document order.
On 30.06.2015 21:20, Max Toro maxtoroq(_at_)gmail(_dot_)com wrote:
The following stylesheet:
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="2.0" exclude-result-prefixes="#all"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";>
<xsl:output method="xml" indent="yes"/>
<xsl:template name="main">
<xsl:variable name="a">
<a/>
</xsl:variable>
<xsl:variable name="b">
<b/>
</xsl:variable>
<for-each1>
<xsl:for-each select="reverse(($a, $b))">
<xsl:copy-of select="."/>
</xsl:for-each>
</for-each1>
<for-each2>
<xsl:for-each select="reverse(($a, $b))/*">
<xsl:copy-of select="."/>
</xsl:for-each>
</for-each2>
</xsl:template>
</xsl:stylesheet>
Outputs:
<?xml version="1.0" encoding="UTF-8"?>
<for-each1>
<b/>
<a/>
</for-each1>
<for-each2>
<a/>
<b/>
</for-each2>
Why is the sequence reordered after applying a path expression?
Is this conformant with the standard? If yes, what section talks about it?
I'm using Saxon 9.6.0.6.
Original post: http://stackoverflow.com/questions/31126950
--
Max Toro
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