<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Can anyone account for the behavior exhibited by the position function in a predicate in the following code sample:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><xsl:variable name="x" select="'A', 'B', 'C'" as="xs:string*"/><o:p></o:p></p><p class=MsoNormal><xsl:variable name="y" select="'a', 'b', 'c'" as="xs:string*"/><o:p></o:p></p><p class=MsoNormal><xsl:for-each select="$x"><o:p></o:p></p><p class=MsoNormal> <xsl:variable name="pos" select="position()"/><o:p></o:p></p><p class=MsoNormal> <xsl:message select="position()"/><o:p></o:p></p><p class=MsoNormal> <xsl:message select="., $y[position()]"/><o:p></o:p></p><p class=MsoNormal> <xsl:message select="., $y[$pos]"/><o:p></o:p></p><p class=MsoNormal></xsl:for-each><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>As the output below shows, when the value of position is stored in a variable and the variable is used in a predicate, you get what you would expect, the selection of a single item corresponding to the current position. But when position() is used directly in the predicate, it returns all the items in the sequence:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>[Saxon-PE] 1<o:p></o:p></p><p class=MsoNormal>[Saxon-PE] A a b c<o:p></o:p></p><p class=MsoNormal>[Saxon-PE] A a<o:p></o:p></p><p class=MsoNormal>[Saxon-PE] 2<o:p></o:p></p><p class=MsoNormal>[Saxon-PE] B a b c<o:p></o:p></p><p class=MsoNormal>[Saxon-PE] B b<o:p></o:p></p><p class=MsoNormal>[Saxon-PE] 3<o:p></o:p></p><p class=MsoNormal>[Saxon-PE] C a b c<o:p></o:p></p><p class=MsoNormal>[Saxon-PE] C c<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Any ideas, or is this simply a bug?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Mark<o:p></o:p></p></div></body></html>