[xep-support] xsl:sort in apply-templates

[Martin Holmes]

Hi there,

>my suggestion would group all authors in order before all editors in 
>order, while your suggestion would interleave all the authors and editors 
>in the lexicographic ordering.

That's actually what I wanted to do. I need to sort the bibliographic items 
on the basis of the first of either author or editor which appears. For 
example, if there's a reference for a book chapter authored by X, in a book 
edited by Y, I want to sort on the former (which is first in the structure 
anyway); if it's just a book with an editor but no specified authors, then 
I want to use the editor value as the sort key. As far as I can tell, with 
the first suggestion I'm getting exactly what I want, because in all cases, 
it happens that the value I need to sort on is the first occurrence of 
either an author or an editor element in the structure.

Cheers,
Martin

At 08:20 AM 25/02/2005, you wrote:

>At 2005-02-25 15:39 +0100, Henk Rutten wrote:
>>What if you remove the forward slashes within your sort:attribute select
>><xsl:sort select="editor | author[1] " /> instead of <xsl:sort
>>select="//editor | //author[1] " />
>
>Your <xsl:sort select="editor | author"/> suggestion would work as an 
>exclusive "one or the other" sort only if there were only one present.
>
>Since <xsl:sort> bases the lexicographic ordering on the value of the 
>XPath expression, providing the union of two nodes in the expression will 
>cause only the value of the first in document order to be used, so if both 
>are present, it will do only the first.
>
>This would be an improvement on my suggestion of:
>
>    <xsl:sort select="editor"/>
>    <xsl:sort select="author"/>
>
>in that my suggestion would group all authors in order before all editors 
>in order, while your suggestion would interleave all the authors and 
>editors in the lexicographic ordering.
>
>If, however, one wanted to ensure the editor had preference over the 
>author in the sort, and you don't know which is first or you know the 
>author is first, then your suggestion would need to be modified to be:
>
>     <xsl:sort select="self::*[editor]/editor |
>                       self::*[not(editor)]/author"/>
>
>... so as to say: the use of editor when the editor child exists and the 
>use of author when the editor child does not exist.
>
>Another way to say the same thing would be:
>
>     <xsl:sort select="editor |
>                       author[not(../editor)]"/>
>
>... so as to say: only use the author child if its parent has no editor 
>children.
>
>I hope this helps.
>
>............................ Ken
>
>--
>World-wide on-site corporate, govt. & user group XML/XSL training.
>G. Ken Holman                 mailto:gkholman at CraneSoftwrights.com
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______________________________________
Martin Holmes
University of Victoria Humanities Computing and Media Centre
mholmes at uvic.ca
martin at mholmes.com
mholmes at halfbakedsoftware.com
http://www.mholmes.com
http://web.uvic.ca/hcmc/
http://www.halfbakedsoftware.com

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