Hi,
I try to retrieve elements from a <xsl:key> using a <xsl:for-each> loop
over atomic values but get the following error:
Error on line 12 of example-b.xsl:
XPTY0020: Leading '/' cannot select the root node of the tree
containing the context item:
the context item is an atomic value
Failed to compile stylesheet. 1 error detected.
Any idea how I can make this work?
Here everything in more detail:
I have the following source document:
--- example.xml ---
<?xml version="1.0" encoding="UTF-8"?>
<example xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
<foo id="a">one</foo>
<foo id="b">two</foo>
<foo id="c">three</foo>
<bar ids="a,b,c"/>
</example>
---
Using a key, I can generate an index as follows:
--- example-a.xsl ---
<?xml version="1.0"?>
<xsl:stylesheet version="2.0"
xmlns="http://www.w3.org/1999/xhtml";
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";>
<xsl:key name="index" match="//*[@id]" use="./@id" />
<xsl:template match="/">
<body>
a: <xsl:value-of select="key('index', 'a')" />
b: <xsl:value-of select="key('index', 'b')" />
c: <xsl:value-of select="key('index', 'c')" />
</body>
</xsl:template>
</xsl:stylesheet>
---
here it is:
---
$ saxon -s:example.xml -xsl:example-a.xsl
<?xml version="1.0" encoding="UTF-8"?>
<body xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns="http://www.w3.org/1999/xhtml";>
a: one
b: two
c: three
</body>
---
but when trying the same with a loop using the tokenized value of @ids
of element <bar ids="a,b,c"/> using the following transformations:
--- example-b.xsl ---
<?xml version="1.0"?>
<xsl:stylesheet version="2.0"
xmlns="http://www.w3.org/1999/xhtml";
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";>
<xsl:key name="index" match="//*[@id]" use="./@id" />
<xsl:template match="/">
<body>
<xsl:for-each select="tokenize(example/bar/@ids, ',')">
<xsl:value-of select="."/>: <xsl:value-of
select="key('index', .)" />
</xsl:for-each>
</body>
</xsl:template>
</xsl:stylesheet>
---
I get the following error:
---
$ saxon -s:example.xml -xsl:example-b.xsl
Error on line 12 of example-b.xsl:
XPTY0020: Leading '/' cannot select the root node of the tree
containing the context item:
the context item is an atomic value
Failed to compile stylesheet. 1 error detected.
---
Any idea how to do this?
Thanks for your help!
Dietrich
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