I have a tag foo that I want to copy unchanged when it is a subtag of
bar, so I have a template (x is the namespace for the document):

<xsl:template match="x:bar/x:foo">
<xsl:copy>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>

BUT, I discovered that someone has been mis-speling foo as foop in the
source files. So I add another template to fix...