Using a Variable in an XPath Attribute Specification
XPath allows you to select nodes based on the value of an
attribute. When using XPath expressions from XSLT, you may want
to use a variable within the attribute comparison string. At
least with xsltproc, however, this is tricky. Simply
putting the variable inside the attribute double-quotes doesn't
seem to work. For example, to find all foo elements
where the attribute bar is equal to the variable named
variableName, the following doesn't work:
select="//foo[@bar='$variableName']"
Solution
The fix is to construct the string using the concat
function:
select="//foo[@bar=concat($variableName, '')]"
With xsltproc this alternative works nicely.
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