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Re: Passing sort criteria as a paramter

Subject: Re: Passing sort criteria as a paramter
From: Jeni Tennison <jeni@xxxxxxxxxxxxxxxx>
Date: Fri, 25 Jan 2002 10:25:16 +0000
sort criteria
Hi David,

> You seemed to get this msg to the list. Wendell, thanks. I didn't
> think of that. BTW, can I use an xsl:attribute tag for another xsl
> element?

Since Wendell nabbed the other question, I'll answer this one ;)

I take it you're asking whether you can use xsl:attribute to
dynamically create an attribute on an XSLT element. So you're asking
if you can do:

    <xsl:attribute name="select">
      <xsl:value-of select="$sortby" />

As a way of getting around the fact that $sortby is a string and you
want to interpret it as an XPath expression.

The answer is no, you can't. You can only use xsl:attribute to add
attributes onto result elements (whether created with literal result
elements or with xsl:element).

Of course if the 'xsl:sort' were a literal result element, then it
would be fine. So if you were generating a stylesheet from your
stylesheet, and set up a namespace alias for the XSLT namespace so
that 'oxsl' was the prefix used for the XSLT elements you're
generating, you can do:

    <xsl:attribute name="select">
      <xsl:value-of select="$sortby" />

and it will generate:

  <oxsl:sort select="Amount[../IsCredit = 1]" />

By the way, I suggest that you forward your use case on to
xsl-editors@xxxxxx - hopefully if they receive enough use cases then
they will add an evaluate() function to XSLT 2.0, so that you could
just do:

  <xsl:sort select="evaluate($sortby)" />



Jeni Tennison

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list

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