simple question

[Mike King]

I believe this is a simple question. I need a XSLT file that removes elements from a source file. I guess the tricky part is I need to use a variable to indicate which element to preserve. In the example below, I want to preserve the "/root/a[1]" element where "1" would be a variable. Can anyone help me? I'm having the hardest time figuring out template rules.

#### Input ####
<?xml version="1.0" ?>
<root>
<a id="1">
<b id="1"/>
</a>
<a id="2">
<b id="2"/>
</a>
<a id="3">
<b id="3"/>
</a>
</root>

#### Output ####
<?xml version="1.0" ?>
<root>
<a id="1">
<b id="1"/>
</a>
</root>

 

[Martin Boehm]

"/root/a[@id = '1']"

Or, with a variable:

<xsl:variable name="id" select="1" />
<xsl:apply-templates select="/root/a[@id = $id]"/>

Martin