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Re: Can't get id() and key() to work

2002-09-08 10:59:22
On Sun, Sep 08, 2002 at 10:02:56AM -0700, Robert Koberg wrote:

Hi,

Assuming you have the key set up correctly you can simply match the 'image' 
tag
from you source XML (example source would help). The source XML's image tag 
has
the unique ID. For example:

<xsl:template match="image">
  <xsl:for-each select="$infodoc">
    <xsl:message>info2=<xsl:value-of select="$path-key"/></xsl:message>
    <xsl:message>info3=<xsl:value-of select="key('imgInfoKey',
$path-key)/@width"/></xsl:message>
    <xsl:message>info4=<xsl:value-of select="key('imgInfoKey',
$path-key)/@height"/></xsl:message>
  </xsl:for-each>
</xsl:template>

I try to avoid extensions. Do you really need them? If you can do without, 
then
you need to get into the context of the document you need information from. 
Then
use the key to find the nodeset and get the value you want from there. You
cannot store the value of this nodeset in a variable. You need to use the key
each time.

Does this help?

Yes, thank you.

As for not using extensions: I understand that using extensions makes
the stylesheet unportable.

BUT

I generate about 500 page with roughly 40 images in each of them.
I *have* to do the lookups as seldom as possible. That's why
I need to convert the RTF into a node-set and then work on
that.

I have now written an extension function which allows me to conveniently
call

    <xsl:variable name="info" select="my:lookup-image-info ($key)"/>

which is a) very readable, b) fast and c) exactly what I need.

(Portability is not an issue for me; xsltproc is available for all
systems where I need it).

But I hope that XSLT 2 solves these problems. It would really be
nice if one could pass the context into key() and id().

Hello,

What I basically need is:

    <xsl:variable name="infodoc" select="document('infodoc.xml')"/>
    <xsl:variable name="info" select="$infodoc/id($key)"/>

ie. I have an XML document in $infodoc which has IDs and I want to
lookup elements in $infodoc.

I tried to use key() and it actually works but I can't use the
result:

    <xsl:variable name="info-fragment">
    <xsl:for-each select="$imginfo">
        <xsl:copy-of select="key('imgInfoKey', $path-key)"/>
    </xsl:for-each>
    </xsl:variable>
    <xsl:message>info2=<xsl:value-of select="$path-key"/></xsl:message>
    <xsl:message>info3a=<xsl:value-of
select="exslt:object-type($info-fragment)"/></xsl:message>
    <xsl:message>info3b=<xsl:value-of
select="count($info-fragment)"/></xsl:message>
    <xsl:variable name="info" select="exslt:node-set($info-fragment)"/>
    <xsl:message>info4=<xsl:value-of select="$info/@width"/></xsl:message>
    <xsl:message>info4b=<xsl:value-of
select="exslt:node-set($info-fragment)/@width"/></xsl:message>

This gives:

info2=images/uy-online-left.jpg
info3a=RTF
info3b=1
info4=
info4b=

so apparently there is something in $info-fragment but what?

--
==============================================
Sowatec AG,       CH-8330 Pfäffikon (ZH)
Witzbergstr. 7,   http://www.sowatec.com
Tel: +41-(0)1-952 55 55
Fax: +41-(0)1-952 55 66
----------------------------------------------
Aaron "Optimizer" Digulla, digulla(_at_)sowatec(_dot_)com
==============================================

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




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


-- 
==============================================
Sowatec AG,       CH-8330 Pfäffikon (ZH)
Witzbergstr. 7,   http://www.sowatec.com
Tel: +41-(0)1-952 55 55
Fax: +41-(0)1-952 55 66
----------------------------------------------
Aaron "Optimizer" Digulla, digulla(_at_)sowatec(_dot_)com
==============================================

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



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