Re: [xsl] Re: [xslt transform & grouping] Using the Muenchian Method?

[Anton Triest <anton@xxxxxxxx>]

Michael PG wrote:

> Now when everything else is working, and when I found the workaround 
> to use Muenchian method in MSXML, I have one more issue.
>
> Currently, when grouping is performed, (see the structure of the XML 
> below), if there is no attribute filter defined in Article element 
> (see info=child in the third Document parent node), or if there is no 
> value in the Article element, the group "child" will not be generated, 
> instead the Article element will hang outside it's own group or 
> directly in the root.
>
> I would like not to display all other elements (like the one in the 
> XML examle below) that doesn't contain any value in the filter 
> element, att all in the tree root.

In the XPath, you can add a predicate to the Document element: 
[Article[@filter=$filter]]
That would leave out the Document elements with no Article passing the 
filter.
But I noticed something else... the Document[@filter='' or 
@filter=$filter] predicate seems to have no effect.
This has been a somewhat chaotic thread, and I'm not sure why it was 
introduced, in any case
if you remove that predicate, the output stays the same. If it was meant 
to completely filter out Document
elements with a different filter then it doesn't work: Article "2.2" is 
in the output although its parent has
a filter="drink". (I think it has no effect on the output because a key 
selects elements in the whole file).
If on the other hand it was meant to allow passing an empty string in 
the param (for not applying any filter)
then you need [$filter='' or @filter=$filter] instead of [@filter='' or 
@filter=$filter].

If you can't get it to work then it might be a good idea to start this 
all over again, and give us once more
a detailed description of what you want, for all possible combinations 
of filters, with a sample input and
above all, the desired output.

Anton


> Thanx,
>
> -Mike
>
> In the following XSLT (current state)
>
> <?xml version='1.0' encoding='UTF-8'?>
>
> <xsl:stylesheet version="1.0" 
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
>
>     <xsl:output method="xml" version="1.0" encoding="UTF-8" 
> indent="yes"/>
>
>     <xsl:key name="by-info" match="Article" use="@info"/>
>
>        <xsl:param name="filter" select="'food'"/>
>
>
>     <xsl:template match="Documents">
>         <Documents>
>             <xsl:for-each select="Document[@filter='' or 
> @filter=$filter]/Article[generate-id()=generate-id(key('by-info',@info)[@filter='' 
> or @filter=$filter])]">
>                 <Document name="{@info}">
>                     <xsl:copy-of 
> select="key('by-info',@info)[@filter=$filter]"/>
>                 </Document>
>             </xsl:for-each>
>         </Documents>
>     </xsl:template>
>
> </xsl:stylesheet>
>
>
> XML
>
>
> <?xml version="1.0" encoding="utf-8"?>
>
> <Documents>
>     <Document chapter="1" title="title 1" href="file1.xml" filter="food">
>         <Article title="1.1" info="sub" filter="food"/>
>         <Article title="1.2" info="main" filter="food"/>
>     </Document>
>     <Document chapter="2" title="title 2" href="file2.xml" 
> filter="drink">
>         <Article title="2.1" info="sub" filter="drink"/>
>         <Article title="2.2" info="main" filter="food"/>
>     </Document>
>     <Document chapter="3" title="title 3" href="file2.xml" filter="">
>         <Article title="3.1" info="sub" filter="drink"/>
>         <Article title="3.2" info="child" filter=""/>
>     </Document>
> </Documents>
>
>
> > From: David Carlisle <davidc@xxxxxxxxx>
> > Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> > Subject: Re: [xsl] Re: [xslt transform & grouping] Using the 
> > Muenchian Method?
> > Date: Wed, 6 Oct 2004 13:44:00 +0100
> >
> > > I tried to use other namespace in XSLT file.
> > >
> > > <xsl:stylesheet xmlns:xsl="http://www.w3.org/TR/WD-xsl"/>
> >
> > that's not just another namespace that is a different language that is
> > almost completely unrelated to XSLT. It was implemented in msxml 2 
> > (and so
> > IE5) prior to Microsoft implementing XSLT, MSXML3 implemented both
> > languages, MSXML4 and later products only implement XSLT. No
> > non-microsft product ever implemented that language, which was loosely
> > based on an early draft of XSL but mainly consisted of microsoft 
> > specific
> > constructs.
> >
> > Microsoft's wd-xsl doesn't have anything analogous to xsl:key as far as
> > I can recall and the behaviour of its templating language was quite
> > different. So you'd have to completely re-write your stylesheet to use
> > that language.
> >
> > It would be bizarre indeed to use that language when it is not supported
> > in any current product. I don't know but I would be most surprised if it
> > is implemented in the standard .net classes.
> >
> > David
> >
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