Re: Problem with Muenchian grouping
At 12:29 PM 11/7/2003, you wrote:
I'm interested in the children of <data> that have an <action> child: I would like to group them by name and perform some processing on them. The problem is I cannot know those names (that is, each element is optional), and the number of elements of each category is undefined. So I don't know how to define the <xsl:key> element that I need. I have tried <xsl:key name="records-by-name" match="/*/*[action]" use="name()"> but that doesn't seem to work.
<xsl:key name="records-by-name" match="*[action]" use="local-name()"/>
This is different from yours in that:
- it matches any element with an action child, not just those directly below the top level
- it uses the local-name() function, as a precaution against namespace confusion. (Though name() should work and you don't have to change this.)
The first fix is what will help in your case, since the elements you want (judging from your sample data) are three levels below the root, not two (for example, /dump/data/project), and hence won't match "/*/*[action]".
Nor can I identify the elements appearing first in their "group": my_element_name[generate-id(.) = generate-id(key('records-by-name', name()))] because precisely I don't know what to put instead of "my_element_name".
Just *[generate-id(.) = generate-id(key('records-by-name', name()))] -- this matches any element on the child axis.
I think there is a problem in the way I want to reach the name (the tag name) of those /*/*[action] nodes. But when I replace 'name()' by 'self::name()' it raises an error (isn't 'self' a correct axis?).
self:: is an axis, but name() is a function, not a node test, so self::name() is illegal.
I hope this is enough to get you back on track--
In fact I have mostly tried to adapt the example given by Dr Jenni Tennison in the "Cocoon, sql and xslt" thread, but in my case, the grouping is done depending on the names of the elements I want to group, not on their children's values.
====================================================================== 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 ---------------------------------------------------------------------- Mulberry Technologies: A Consultancy Specializing in SGML and XML ======================================================================
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