Before & after

Hi,

I am running into a dilemma to print out/combine the result of several
element's value  with the same sibling info. 

Here is a fragment of the xml file:

[...]
<books>
  <publisher> a </publisher>
  <date>
    <author> b1 </author>
    <title name="c1">
      <isbn> 100 </isbn>
    </title>
    <title name="c2">
      <isbn> 101 </isbn>
    </title>
  </date>

  <publisher> a </publisher>
  <date>
    <author> b2 </author>
    <title name="c3">
      <isbn> 102 </isbn>
    </title>
  </date>
  
  [...]


The required output is:

Publisher: a
Author: b1
 title: c1; isbn= 100
 title: c2 ; isbn= 101

Publisher: a
Author: b2
 title: c3; isbn= 102
 

when ALL publisher,author, and title is matched to the order: 
   a, (b1,b2) (c1, c2,c3).



 Precisely, I need to combine all the matched titles under non-duplicated
matched author & publisher.  What approach should I be taking?

The problem I am having is that either the output would be w/ duplicated
Publisher & Author:

Publisher: a
Author: b1
 title: c1; isbn= 100


Publisher: a
Author: b1
 title: c2; isbn= 101

or it would print out the lines of:

Publisher: a
Author: b

when the searched title is "e" which is not a matched title. 

What I want to do is print out only the title when the publisher and author's
info are the same; else (if the author is different; eg. b2) then print out the
publisher, author, and title.  Is there a "before and after" in XSLT?  It is
not a procedural language as I currently understand.  :>)))


Many thanks in advance,

Kim




   


  

=====
Kim

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