[XSL-LIST Mailing List Archive Home]
[By Thread]
[By Date]
[Recent Entries]
[Reply To This Message]
Re: XSLT/XPath Question (Grouping Authors by First Ch
Subject: Re: XSLT/XPath Question (Grouping Authors by First Character of Last Name)
From: "Dimitre Novatchev" <dnovatchev@xxxxxxxxx>
Date: Sat, 3 Mar 2007 19:24:48 -0800
|
Perfect. Thanks. Just out of curiosity, is this possible
(practical?) in XSLT 1.0?
Yes and yes -- read about the Muenchian method for grouping.
Actually, this reminds me that six years ago I published a snippet in
topxml.com solving exactly your problem in XSLT 1.0:
http://www.topxml.com/code/default.asp?p=3&id=v20010129150851
--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
On 3/3/07, Kevin Grover <kevin@xxxxxxxxxxxxxxx> wrote:
Perfect. Thanks. Just out of curiosity, is this possible
(practical?) in XSLT 1.0?
On 3/3/07, Dimitre Novatchev <dnovatchev@xxxxxxxxx> wrote:
> You are not using XSLT 2.0 to its full potential.
>
> The solution is as easy as this:
>
> <xsl:stylesheet version="2.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> >
> <xsl:output method="text"/>
>
> <xsl:template match="/">
> <xsl:for-each-group select="*/author"
> group-by="substring(name/@file-as,1,1)"
> >
> <xsl:text>

</xsl:text>
> <xsl:value-of select="current-grouping-key()"/>
> <xsl:text>
</xsl:text>
>
> <xsl:for-each select="current-group()">
> <xsl:value-of select="name/@file-as"/>
> <xsl:text>
</xsl:text>
> </xsl:for-each>
> </xsl:for-each-group>
> </xsl:template>
> </xsl:stylesheet>
>
> and when applied on the provided xml document it produces the wanted result:
>
>
>
> 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
>
>
>
> --
> Cheers,
> Dimitre Novatchev
> ---------------------------------------
> Truly great madness cannot be achieved without significant intelligence.
> ---------------------------------------
> To invent, you need a good imagination and a pile of junk
> -------------------------------------
> You've achieved success in your field when you don't know whether what
> you're doing is work or play
>
>
>
>
> On 3/3/07, Kevin Grover <kevin@xxxxxxxxxxxxxxx> wrote:
> > I have an XSLT/XPath Question that I've been beating my head against
> > for a while.
> >
> > I have a list of authors with a name element and a file-as attribute
> > (XPATH: /booklist/author/name/@file-as). I currently build a Table of
> > Contents sorted by the author/name/@file-as attribute. That works OK.
> > I want to add further markup (by putting authors in groups by the
> > first character of their last name).
> >
> > I can get the first character of the last name, I've even created a
> > key that allows me to access the nodes of authors by the first
> > character in the last name (see the commented out section of the b.xsl
> > file included below). However, I can not figure out how to get a list
> > of distinct characters (from the last names) so that I can iterate
> > over them and generate my list.
> >
> > Here are stripped down example source files:
> >
> > Exmaple author file: (file a.xml)
> >
> > <?xml version="1.0" encoding="UTF-8"?>
> > <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>
> >
> >
> > I can extract the authors and generate a table of contents with the
> > following XSLT: (b.xsl)
> >
> > <?xml version="1.0"?>
> > <xsl:stylesheet version="1.0"
> > xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> > >
> > <xsl:output method="xml"/>
> > <xsl:output indent="yes"/>
> > <xsl:strip-space elements="*"/>
> >
> > <xsl:key name="alet" match="//author" use="substring(name/@file-as,1,1)"/>
> >
> > <xsl:template match="/booklist">
> > <xsl:call-template name="gen-toc"/>
> > </xsl:template>
> >
> > <!-- Generate Table of Contents -->
> > <xsl:template name="gen-toc">
> > <div id="toc" class="toc">
> > <!--
> > <h1>Test</h1>
> > <ul>
> > <xsl:for-each select="key('alet','A')">
> > <li><xsl:value-of select="name/@file-as"/></li>
> > </xsl:for-each>
> > </ul>
> > -->
> > <h1>Table of Contents (by Author)</h1>
> > <ul>
> > <xsl:for-each select="//author/name">
> > <xsl:sort select="@file-as"/>
> > <li><a href="#{generate-id(..)}"><xsl:value-of
> > select="@file-as"/></a></li>
> > </xsl:for-each>
> > </ul>
> > </div>
> > </xsl:template>
> >
> > </xsl:stylesheet>
> >
> >
> > This works. It generates this: (out.xml)
> >
> > <?xml version="1.0"?>
> > <div id="toc" class="toc">
> > <h1>Table of Contents (by Author)</h1>
> > <ul>
> > <li>
> > <a href="#id91524">Adams, Douglas</a>
> > </li>
> > <li>
> > <a href="#id91570">Anderson, Kevin J.</a>
> > </li>
> > <li>
> > <a href="#id91578">Anthony, Piers</a>
> > </li>
> > <li>
> > <a href="#id91588">Archer, Jeffrey</a>
> > </li>
> > <li>
> > <a href="#id91597">Baldacci, David</a>
> > </li>
> > <li>
> > <a href="#id91607">Ball, Margaret</a>
> > </li>
> > <li>
> > <a href="#id91617">Bradley, Marion Zimmer</a>
> > </li>
> > <li>
> > <a href="#id91627">Carcaterra, Lorenzo</a>
> > </li>
> > <li>
> > <a href="#id93622">Card, Orson Scott</a>
> > </li>
> > <li>
> > <a href="#id93633">Chalker, Jack L.</a>
> > </li>
> > <li>
> > <a href="#id93643">Dahl, Roald</a>
> > </li>
> > <li>
> > <a href="#id93653">Daley, Brian</a>
> > </li>
> > <li>
> > <a href="#id93663">Dann, Jack</a>
> > </li>
> > </ul>
> > </div>
> >
> >
> > I want to change that so that I have the authors in subsections, with
> > the first letter of their last names as the the main entry, like so
> >
> > A
> > //author/name/@file-as[.=='A']
> > B
> > //author/name/@file-as[.=='B']
> > etc..
> >
> > Like this output: (out-desired.xml)
> >
> > [This was hand edited, I have not yet figured out how to automatically
> > generate it.]
> >
> > <?xml version="1.0"?>
> > <div id="toc" class="toc">
> > <h1>Table of Contents (by Author)</h1>
> > <ul>
> > <li>
> > <a name="A">A</a>
> > <ul>
> > <li>
> > <a href="#id91524">Adams, Douglas</a>
> > </li>
> > <li>
> > <a href="#id91570">Anderson, Kevin J.</a>
> > </li>
> > <li>
> > <a href="#id91578">Anthony, Piers</a>
> > </li>
> > <li>
> > <a href="#id91588">Archer, Jeffrey</a>
> > </li>
> > <li>
> > <a href="#id91597">Baldacci, David</a>
> > </li>
> > </ul>
> > </li>
> > <li>
> > <a name="B">B</a>
> > <ul>
> > <li>
> > <a href="#id91607">Ball, Margaret</a>
> > </li>
> > <li>
> > <a href="#id91617">Bradley, Marion Zimmer</a>
> > </li>
> > </ul>
> > </li>
> > <li>
> > <a name="C">C</a>
> > <ul>
> > <li>
> > <a href="#id91627">Carcaterra, Lorenzo</a>
> > </li>
> > <li>
> > <a href="#id93622">Card, Orson Scott</a>
> > </li>
> > <li>
> > <a href="#id93633">Chalker, Jack L.</a>
> > </li>
> > </ul>
> > </li>
> > <li>
> > <a name="D">D</a>
> > <ul>
> > <li>
> > <a href="#id93643">Dahl, Roald</a>
> > </li>
> > <li>
> > <a href="#id93653">Daley, Brian</a>
> > </li>
> > <li>
> > <a href="#id93663">Dann, Jack</a>
> > </li>
> > </ul>
> > </li>
> > </ul>
> > </div>
> >
> >
> > I've tried some XPath 2 stuff and XQuery. I can get a list of first
> > letters using XQuery (and thus XPath 2)
> >
> > For example: (file fl.xq)
> >
> > for $a in //author/name/substring(@file-as,1,1)
> > return
> > <c>{$a}</c>
> >
> >
> > Generates a list of the characters of the last name (although not unique).
> >
> > I tried embedding something like the above "for $a in.." into an XSLT
> > 2.0 stylesheet, and assign it to a variable, but I get an error from
> > saxon when I tried it.
> >
> > Something like this is desired.... (with UNIQUE-SET-OF-FIRST-LETTERS)
> > replaced with something that works. I set this to XSLT 2, and tried
> > "$letters//l" in place of that place-holder text
> > (UNIQUE-SET-OF-FIRST-LETTERS). It generated the Letter items A B C
> > .., but all of the sub <ul>s where empty.
> >
> > <?xml version="1.0"?>
> > <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
> > <xsl:output method="xml"/>
> > <xsl:output indent="yes"/>
> > <xsl:strip-space elements="*"/>
> >
> > <xsl:key name="alet" match="//author" use="substring(name/@file-as,1,1)"/>
> >
> > <!--
> > <xsl:variable name="letters">
> > <l>A</l>
> > <l>B</l>
> > <l>C</l>
> > <l>D</l>
> > <l>E</l>
> > </xsl:variable>
> > -->
> > <xsl:template match="/booklist">
> > <xsl:call-template name="gen-toc"/>
> > </xsl:template>
> >
> > <!-- Generate Table of Contents -->
> > <xsl:template name="gen-toc">
> > <div id="toc" class="toc">
> > <h1>Table of Contents (by Author)</h1>
> > <ul>
> > <xsl:for-each select="UNIQUE-SET-OF-FIRST-LETTERS">
> > <xsl:variable name="lc" select="."/>
> > <li>
> > <a>
> > <xsl:attribute name="name" select="$lc"/>
> > <xsl:value-of select="$lc"/>
> > </a>
> > <ul>
> > <xsl:for-each select="key('alet',$lc)">
> > <xsl:sort select="name/@file-as"/>
> > <li>
> > <a href="#{generate-id(.)}">
> > <xsl:value-of select="name/@file-as"/>
> > </a>
> > </li>
> > </xsl:for-each>
> > </ul>
> > </li>
> > </xsl:for-each>
> > </ul>
> > </div>
> > </xsl:template>
> > </xsl:stylesheet>
> >
> > Hopefully, I didn't include too much detail.
> >
> > Any help appreciated. Thanks.
|
PURCHASE STYLUS STUDIO ONLINE TODAY!
Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!
Download The World's Best XML IDE!
Accelerate XML development with our award-winning XML IDE - Download a free trial today!
Subscribe in XML format
RSS 2.0 |
|
Atom 0.3 |
|
|