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Re: Lookup without document('') function

Subject: Re: Lookup without document('') function
From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>
Date: Mon, 10 Nov 2003 10:52:05 -0500
xsl document function problem
Hi David,

Well, assuming you can't switch processors as outlined by Kip in that very on-topic post....

At 01:19 AM 11/8/2003, you wrote:
Technically I can probably put the
lookup table in the input source since I'm getting it back from a
Database Query.  One other question, is there any way to use XPath to
eliminate duplicates from a Node Set.

Yes, but we need to understand what you mean by "duplicate".


  Since my XML I'm dealing with
looks something like:

<DGS>
   <BOOKMARKS>
       <TABLE>
           <BMTABLE>CMSCASE</BMTABLE>
       </TABLE>
       <TABLE>
           <BMTABLE>CMSCASE</BMTABLE>
       </TABLE>
       <TABLE>
           <BMTABLE>CMSCASE</BMTABLE>
       </TABLE>
       <TABLE>
           <BMTABLE>CMSCASE</BMTABLE>
       </TABLE>
       <TABLE>
           <BMTABLE>EMPREP</BMTABLE>
       </TABLE>
       <TABLE>
           <BMTABLE>EMPREP</BMTABLE>
       </TABLE>
   </BOOKMARKS>
</DGS>

Is there anyway to get a TABLE nodeset that would just return the
following using XPATH:

<TABLE>
    <BMTABLE>CMSCASE</BMTABLE>
    <BMTABLE>EMPREP</BMTABLE>
</TABLE>

Yes, de-duplicating is possible; you most commonly see it as a step along the way to grouping.


The most popular and friendly way, assuming you're familiar with keys, is to declare a key that lets you retrieve nodes by their value, and then when you process a node, test whether it's the first (or last) of the nodes retrieved by the key with the current value. This can be done either with the generate-id() function or by using a counting-the-union approach for testing node identity.

That's the explanation in prose; more useful to you would be to see the code, which you can find in any resource like the XSL FAQ, www.jennitennison.com, or any on- or off-line resource that describes grouping in XSLT 1.0.

Cheers,
Wendell


I'll keep looking for an interface to a processor that supports the
document() function as that is the easiest way I can see in getting
this to work (the site this will be implemented on is using XALAN so I
don't have to worry about it when its in production).



=====
"...there is nothing stranger than people." - Anonymous

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======================================================================
Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
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  Mulberry Technologies: A Consultancy Specializing in SGML and XML
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XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list



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