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I have a question about how to sort based on attribute value.
I have the following source document and I would like to sort the track items by the value of the title class value.
Hopefully someone can help with this.
<trackList>
<track>
<location>http://localhost/vmydoc</location>
<title class="STD">Data Two</title>
</track>
<track>
<location>http://localhost/vmydoc</location>
<title class="SH">Data Three</title>
</track>
<track>
<location>http://localhost/vmydoc</location>
<title class="STD">Data Four</title>
</track>
<track>
<location>http://localhost/vmydoc</location>
<title class="SH">Data Five</title>
</track>
</trackList>
The final output should look like this:
<trackList>
<track>
<location>http://localhost/vmydoc</location>
<title class="SH">Data Three</title>
</track>
<track>
<location>http://localhost/vmydoc</location>
<title class="SH">Data Five</title>
</track>
<track>
<location>http://localhost/vmydoc</location>
<title class="STD">Data Four</title>
</track>
<track>
<location>http://localhost/vmydoc</location>
<title class="STD">Data Two</title>
</track>
</trackList>
I have tried the following but it does not work.
<xsl:for-each-group select="title" group-by="@class">
<xsl:for-each select="current-group()">
<xsl:value-of select="@class" />
</xsl:for-each>
</xsl:for-each-group>
Thanks.
924
XSLT's xsl:sort instruction lets you sort a group of similar elements. Attributes for this element let you add details about how you want the sort done -- for example, you can sort using alphabetic or numeric ordering, sort on multiple keys, and reverse the sort order.
USAGE: sortxml.exe [options] infile [outfile] infile The name of the file to sort, etc. outfile The name of the file to save the output to.
XSLT <xsl:variable>The <xsl:variable> element is used to declare a local or global variable. Note: The variable is global if it's declared as a top-level element, and local if it's declared within a template. Note: Once you have set a variable's value, you cannot change or modify that value!
The result of substring-after(Title, ' ') will be everything after the first space in the Title element. As it iterates through the elements, the XSLT processor will be sorting this set: and Peace. Bostonians.
You can do this as follows:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes" omit-xml-declaration="yes"/>
<xsl:template match="@* | node()">
<xsl:copy>
<xsl:apply-templates select="@* | node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="trackList">
<xsl:copy>
<xsl:apply-templates select="track">
<xsl:sort select="title/@class"/>
</xsl:apply-templates>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
When run on your sample input, the result is:
<trackList>
<track>
<location>http://localhost/vmydoc</location>
<title class="SH">Data Three</title>
</track>
<track>
<location>http://localhost/vmydoc</location>
<title class="SH">Data Five</title>
</track>
<track>
<location>http://localhost/vmydoc</location>
<title class="STD">Data Two</title>
</track>
<track>
<location>http://localhost/vmydoc</location>
<title class="STD">Data Four</title>
</track>
</trackList>
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