Re: XSLT/XPath Question (Grouping Authors by First Ch

It also seems that this may have answered my other question: about
saving the list of letters so I can iterate over them later (to make
links to the TOC entries.  It looks like I can just take the main
for-each loop and save that code to a variable.  I'll play with it.

I guess I need to play with the <xsl:key/>'s some more.  The code does
not seem obvious to me at all....

At 2007-03-03 18:52 -0800, Kevin Grover wrote:
>Perfect.  Thanks.  Just out of curiosity, is this possible
>(practical?) in XSLT 1.0?

I hope this helps.

. . . . . . . Ken

t:\>type grover.xml
<booklist>
   <author>
      <name file-as="Adams, Douglas">Douglas Adams</name>
   </author>
   <author>
      <name file-as="Anderson, Kevin J.">Kevin J. Anderson</name>
   </author>
   <author>
      <name file-as="Anthony, Piers">Piers Anthony</name>
   </author>
   <author>
      <name file-as="Archer, Jeffrey">Jeffrey Archer</name>
   </author>
   <author>
      <name file-as="Baldacci, David">David Baldacci</name>
   </author>
   <author>
      <name file-as="Ball, Margaret">Margaret Ball</name>
   </author>
   <author>
      <name file-as="Bradley, Marion Zimmer">Marion Zimmer Bradley</name>
   </author>
   <author>
      <name file-as="Carcaterra, Lorenzo">Lorenzo Carcaterra</name>
   </author>
   <author>
      <name file-as="Card, Orson Scott">Orson Scott Card</name>
   </author>
   <author>
      <name file-as="Chalker, Jack L.">Jack L. Chalker</name>
   </author>
   <author>
      <name file-as="Dahl, Roald">Roald Dahl</name>
   </author>
   <author>
      <name file-as="Daley, Brian">Brian Daley</name>
   </author>
   <author>
      <name file-as="Dann, Jack">Jack Dann</name>
   </author>
</booklist>

t:\>type grover.xsl
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
   <xsl:output method="text"/>

   <xsl:key name="alet" match="author"
            use="substring(name/@file-as,1,1)"/>

   <xsl:template match="/">
    <xsl:for-each select="*/author[generate-id(.)=
                     generate-id(key('alet',substring(name/@file-as,1,1))[1])]">
      <xsl:text>&#xA;&#xA;</xsl:text>
      <xsl:value-of select="substring(name/@file-as,1,1)"/>
      <xsl:text>&#xA;</xsl:text>

      <xsl:for-each select="key('alet',substring(name/@file-as,1,1))">
        <xsl:value-of select="name/@file-as"/>
        <xsl:text>&#xA;</xsl:text>
      </xsl:for-each>
    </xsl:for-each>
  </xsl:template>
</xsl:stylesheet>

t:\>call xslt grover.xml grover.xsl grover.out

t:\>type grover.out

A
Adams, Douglas
Anderson, Kevin J.
Anthony, Piers
Archer, Jeffrey

B
Baldacci, David
Ball, Margaret
Bradley, Marion Zimmer

C
Carcaterra, Lorenzo
Card, Orson Scott
Chalker, Jack L.

D
Dahl, Roald
Daley, Brian
Dann, Jack

t:\>rem Done!

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