RE: [xsl] Getting a predicate right

["Jacoby, Peter R." <PJACOBY at PARTNERS dot ORG>]

Matt,

> My XML Sheet looks like this:
> <test>
> <colors>
>   <desc id="0" name="blue"/>
>   <desc id="1" name="red"/>
>   <desc id="2" name="white"/>
> </colors>
> <mesg grp="1">Hi how are you?</mesg>
> <mesg grp="0">I am fine.</mesg>
> <mesg grp="2">That is good.</mesg>
> </test>
> In my XSL I am going through the messages and trying
> to match the attribute grp from mesg with the
> attribute id from desc.
> something like this:
> //test/colors/desc[@grp]/@name
> or
> //test/colors/desc[@id = @grp]/@name

You're close, but since your XPath grabs a reference to a new element as the
context node, you need to save off your search string before attempting to
match.  If the <mesg> element is the context node you can do something like
this:

<xsl:template match="mesg">
	<xsl:variable name="grpToMatch" select="@grp" />
	<xsl:value-of select="/test/colors/desc[@id=$grpToMatch]/@name" />
</xsl:template>

Or you can do it the other way around (match on the desc).

Hope that helps.

-Peter 

[Two colo(u)r questions in one afternoon, at least this one was spelled
correctly.]




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