I have an XML text file, divided into <deposition>s, each marked up with <footnote> and <appnote>containing identifying numbers and letters for footnote purposes. Now I want to cycle through those (XSL 3.0/Saxon) and then get an attribute of the element immediately preceding it to populate a new footnote 'block' called <footnotes> at the end of each <deposition> . Test can be found here http://xsltfiddle.liberty-development.net/948Fn5a/16
XML:
<?xml version="1.0" encoding="UTF-8"?>
<corpus>
<deposition>
<deposition-title>Praesent vitae</deposition-title>
<text>
<seg n="seg1" type="not_foo">Lorem ipsum dolor sit amet, consectetur
adipiscing elit. Vivamus<note2 n="abc">another note 2</note2><appnote>a</appnote> ultrices consequat facilisis.
Suspendisse a odio<note n="def">foo note</note><footnote>1</footnote> in lobortis. Aenean
non dui scelerisque, rutrum est at, cursus sem.</seg>
<seg n="seg2" type="foo">Ut pharetra bibendum ipsum, portitor
velit pharetra quis. Aeneano<note n="ghi">foo note</note><footnote>2</footnote> purus. Praesent
aliquam viverra tellus<note n="jkl">another note</note><footnote>3</footnote> in condimentum.</seg><footnote>4</footnote>
</text>
</deposition>
<deposition>
<deposition-title>Elementum arcu non</deposition-title>
<text>
<seg n="seg1" type="foo">Curabitur pulvinar leo eget. Orci varius
natoque penatibus et magnis dis<note n="mno">foo note</note><footnote>1</footnote> montes,
nascetur ridiculus mus.</seg><footnote>2</footnote>
<seg n="seg2" type="foo">Curabitur pulvinar leo eget. Orci varius
natoque penatibus<note2 n="pqr">another note 2</note2><appnote>a</appnote> et
magnis dis<note n="stu">foo note</note><footnote>3</footnote> montes,
nascetur ridiculus mus.</seg><footnote>4</footnote>
<seg n="seg3" type="not_foo">Morbi vehicula dolor bibendum enim mollis lobortis.
Nulla rutrum vel diam vel posuere. Aliquam pellentesque
malesuada elit sed tempor.</seg>
</text>
</deposition>
<deposition>
<deposition-title>Elementum arcu non</deposition-title>
<text>
<seg n="seg1" type="foo">Curabitur pulvinar leo eget. Orci varius
natoque penatibus et magnis dis<note n="vwx">foo note</note><footnote>1</footnote> montes,
nascetur ridiculus mus.</seg><footnote>2</footnote>
<seg n="seg2" type="not_foo">Morbi vehicula dolor bibendum enim mollis lobortis.
Nulla rutrum vel diam vel posuere. Aliquam<note2 n="yz">another note 2</note2><appnote>a</appnote> pellentesque
malesuada elit sed tempor.</seg>
</text>
</deposition>
</corpus>
XSL:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
exclude-result-prefixes="xs"
version="3.0">
<xsl:mode on-no-match="shallow-copy"/>
<xsl:template match="/">
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="deposition">
<deposition>
<xsl:apply-templates/>
<footnotes>
<xsl:for-each select="text//footnote">
<xsl:variable name="pos" select="./current() - 1"/>
<footitem>
<xsl:value-of select=". || '='"/><xsl:value-of select="preceding::node()[$pos]/@n"/>
</footitem>
</xsl:for-each>
<xsl:for-each select="text//appnote">
<xsl:variable name="pos" select="./current() - 1"/>
<appitem>
<xsl:value-of select=". || '='"/><xsl:value-of select="preceding::node()[$pos]/@n"/>
</appitem>
</xsl:for-each>
</footnotes>
</deposition>
</xsl:template>
</xsl:stylesheet>
However the result is unexpected, likely due to misunderstanding current() and preceding::node.
For example, for the first <deposition> I would expect the following to appear after the last seg in each deposition:
<footnotes>
<footitem>1=def</footitem>
<footitem>2=ghi</footitem>
<footitem>3=jkl</footitem>
<footitem>4=seg1</footitem>
</footnotes>
<appnotes>
<appitem>a=abc</appitem>
</appnotes>
But I am getting Error executing XSLT ....cannot convert string "a" to double.
(NB: this example is generic and the previous element could be one of many names, so hardcoding the name of an element is not a feasible solution.)
Many, many thanks in advance for all the help with this massive project!