Hello,
This is my first post to this list and I apologize for it's
length. My
question basically is whether it is possible to create a key
on a variable
which contains the result of applying a template?
This is my umpteenth answer on this list and I apologize for its
brevity.
The answer is yes. When you declare a key using xsl:key then you can use
the key() function referencing that key with ANY source document
including a temporary tree. If necessary, use xsl:for-each to ensure
that the correct document is current before calling key().
Michael Kay
Software AG
home: Michael(_dot_)H(_dot_)Kay(_at_)ntlworld(_dot_)com
work: Michael(_dot_)Kay(_at_)softwareag(_dot_)com
In my real
stylesheet
and xml the template which creates the node-set I would like
to create the
key on is much more complicated than the example I have given
below - but
the concept is the same. I apply-templates to the source
document and the
result tree fragment is kept in a variable ($alphabet). I
convert this to a
node-set ($alphabet-exslNodeSet) and then use that node-set
in another
template. It works but is pretty slow - I think it would be
much faster if
I were able to create a key on the node-set (each item in the
node set is
used multiple times). I can't see how to do that - it looks like my
attempt below gives me the code in the variable, not the
result. I know I
can't use a variable in the key's match attribute, so I'm at
a loss how to
do this.
Thanks for any suggestions,
Grainne.
The Stylesheet:
============
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
xmlns:saxon="http://icl.com/saxon";
xmlns:exsl="http://exslt.org/common";
exclude-result-prefixes="ss"
extension-element-prefixes="exsl saxon">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:variable name="alphabet">
<xsl:apply-templates
select="/test/alphabetList/alphabet" mode="loadList"/>
</xsl:variable>
<xsl:variable
name="alphabet-NodeSet"
select="document('')/xsl:stylesheet/xsl:variable[(_at_)name='alphabet']" />
<xsl:variable name="alphabet-exslNodeSet"
select="exsl:node-set($alphabet)"/>
<xsl:key name="myKey"
match="/*/xsl:variable[(_at_)name='alphabet']" use="@col"/>
<xsl:template match="alphabet" mode="loadList">
<xsl:copy-of select="."/>
</xsl:template>
<xsl:template match="*"/>
<xsl:template match="/">
Value of alphabet variable is:<xsl:text>
</xsl:text> <xsl:copy-of select="$alphabet"/><xsl:text>
</xsl:text>
Value of alphabet-NodeSet varaible is (I think
this is what I get in the
key!!)<xsl:text>
</xsl:text><xsl:copy-of
select="$alphabet-NodeSet"/><xsl:text>
</xsl:text>
Value of alphabet-exslNodeSet variable is <xsl:text>
</xsl:text><xsl:copy-of
select="$alphabet-exslNodeSet"/> <xsl:text>
</xsl:text>
<xsl:apply-templates select="test/numbers"/>
</xsl:template>
<xsl:template match="numbers">
<xsl:for-each select="number">
<xsl:variable name="curPosition"
select="position()"/>
Using the key to get the alphabet
element (THIS is what I'd like to do
since each node in the set is used multiple times):
<number value="{.}">
<xsl:for-each select="document('')">
<xsl:copy-of
select="key('myKey',$curPosition)"/>
</xsl:for-each>
</number>
Using the exslNodeSet variable to get
the alphabet element (what I am
doing but which is very slow in my real code):
<number value="{.}">
<xsl:copy-of
select="$alphabet-exslNodeSet/alphabet[(_at_)col=$curPosition]"/>
</number>
<xsl:text>
</xsl:text>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
Example xml:
==========
<?xml version="1.0" encoding="UTF-8"?>
<test>
<alphabetList>
<alphabet col="1">a</alphabet>
<alphabet col="2">b</alphabet>
<alphabet col="3">c</alphabet>
<alphabet col="4">d</alphabet>
<alphabet col="5">e</alphabet>
</alphabetList>
<numbers>
<number>one</number>
<number>two</number>
<number>three</number>
<number>four</number>
<number>five</number>
</numbers>
</test>
Result (tidied up a little):
====================
<?xml version="1.0" encoding="UTF-8"?>
Value of alphabet variable is:
<alphabet col="1">a</alphabet>
<alphabet col="2">b</alphabet>
<alphabet col="3">c</alphabet>
<alphabet col="4">d</alphabet>
<alphabet col="5">e</alphabet>
Value of alphabet-NodeSet varaible is (I think this is what I
get in the key!!) <xsl:variable
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
xmlns:saxon="http://icl.com/saxon";
xmlns:exsl="http://exslt.org/common";
name="alphabet">
<xsl:apply-templates select="/test/alphabetList/alphabet"
mode="loadList"/> </xsl:variable>
Value of alphabet-exslNodeSet variable is
<alphabet col="1">a</alphabet>
<alphabet col="2">b</alphabet>
<alphabet col="3">c</alphabet>
<alphabet col="4">d</alphabet>
<alphabet col="5">e</alphabet>
Using the key to get the alphabet
element (THIS is what I'd like to do
since each node in the set is used multiple times):
<number value="one"/>
Using the exslNodeSet variable to get
the alphabet element (what I am
doing but which is very slow in my real code):
<number value="one">
<alphabet col="1">a</alphabet>
</number>
...<snip>...
Using the key to get the alphabet
element (THIS is what I'd like to do
since each node in the set is used multiple times):
<number value="five"/>
Using the exslNodeSet variable to get
the alphabet element (what I am
doing but which is very slow in my real code):
<number value="five">
<alphabet col="5">e</alphabet>
</number>
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list