How to select elements by part of their name in XSL/XPath?

Question

How do I use apply-templates to select only those elements by name (not value) that end with a specific pattern? Assume the following xml...

<report>
  <report_item>
    <report_created_on/>
    <report_cross_ref/>
    <monthly_adj/>
    <quarterly_adj/>
    <ytd_adj/>
  </report_item>
  <report_item>
   ....
  </report_item>
</report>

I want to use <xsl:apply-templates> on all instances of <report_item> where descendant elements end with 'adj`, so, in this case, only monthly_adj, quaterly_adj, and ytd_adj would be selected and applied with the template.

<xsl:template match="report">
   <xsl:apply-templates select="report_item/(elements ending with 'adj')"/>
</xsl:template>

Answer 1

I don't think that regular expression syntax is available in this context, even in XSLT 2.0. But you don't need it in this case.

<xsl:apply-templates select="report_item/*[ends-with(name(), 'adj')]"/>

* matches any node

[pred] performs a node test against the selector (in this case *) (where pred is a predicate evaluated in the context of the selected node)

name() returns the element's tag name (should be equivalent to local-name for this purpose).

ends-with() is a built-in XPath string function.

Answer 2

Slightly neater solution (XSLT 2.0+ only):

<xsl:apply-templates select="report_item/*[matches(name(),'adj$')]"/>

Here is a self-test to prove it works. (Tested on Saxon).

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns:fn="http://www.w3.org/2005/xpath-functions" 
                xmlns:xs="http://www.w3.org/2001/XMLSchema" 
                exclude-result-prefixes="xs fn">
 <xsl:output method="xml" indent="yes" encoding="utf-8" />
 <xsl:variable name="report-data">
  <report>
   <report_item>
     <report_created_on/>
     <report_cross_ref/>
     <monthly_adj>Jan</monthly_adj>
     <quarterly_adj>Q1</quarterly_adj>
     <ytd_adj>2012</ytd_adj>
   </report_item>
  </report>
 </xsl:variable>
 <xsl:template match="/" name="main">
  <reports-ending-with-adj>
   <xsl:element name="using-regex">
    <xsl:apply-templates select="$report-data//report_item/*[fn:matches(name(),'adj$')]"/> 
   </xsl:element>
   <xsl:element name="using-ends-with-function">
    <xsl:apply-templates select="$report-data//report_item/*[fn:ends-with(name(), 'adj')]"/>
   </xsl:element>
  </reports-ending-with-adj>
 </xsl:template>
</xsl:stylesheet>