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RE: Parametrized xsl:sort

2002-08-30 10:13:21
Hi Neale.

you could try:
        <xsl:call-template name="petTable">
                <xsl:with-param name="selection"
select="pet[(_at_)species='dog']"/>
                <xsl:with-param name="sortkey" select="'name'"/> <!--
select a string name instead of attribute -->
                <xsl:with-param name="sortorder" select="'descending'"/>
        </xsl:call-template>

        <xsl:template name="petTable">
                <xsl:param name="selection" select="*"/>
                <xsl:param name="sortkey" select="''"/>
                <xsl:param name="sortorder" select="''"/>
                ...
                <xsl:apply-templates select="$selection">
                        <xsl:sort select="@*[name()=$sortkey]"
order="descending"/>
                </xsl:apply-templates>
        ..>
        </xsl:template>

this is untested but it might work. the select will look for the
attribute named $sortkey and use that in the sort.


-----Original Message-----
From: owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
[mailto:owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com] On Behalf Of 
Neale
Morison
Sent: Friday, August 30, 2002 5:04 AM
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: RE: [xsl] Parametrized xsl:sort




-----Original Message-----
From: owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
[mailto:owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com]On Behalf Of 
Peter Davis
Sent: Friday, 30 August 2002 12:57 PM
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: Re: [xsl] Parametrized xsl:sort


On Thursday 29 August 2002 19:15, Neale Morison wrote:
To be specific, I want the result of:
        <xsl:sort select="$sortkey" order="descending"/>

Since a normal variable doesn't change, the sort will have no effect
(but I'm sure you already figured this out).

with parameter sortkey:
        <xsl:with-param name="sortkey" select="@name"/>

If you pass select="@name", it will evaluate "@name" in the context of

the with-param, not in the sort.  So you probably want to change this
to:

<xsl:with-param name="sortkey" select="'@name'"/>

which will pass the string '@name' to be evaluated later.

to be equivalent to:
        <xsl:sort select="@name" order="descending"/>

To evaluate the string, you need to use some kind of extension
function.  Look in the documentation of whatever processor you use; it

will probably look
like:

<xsl:sort order="descending" select="xxx:evaluate($sortkey)"/>

The 'xxx' will be associated with an extension namespace specific to
your processor.  The evaluate() function will take the string $sortkey

and evaluate it as an XPath expression.

--
Peter Davis

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

Thanks. I thought I might be able to do it without an eval, but the eval
method does work. Regards, Neale

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



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



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