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[xsl] Several XSLT questions...

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Hi, I've been working with a OAI-PMH complaint tool and I need to present the XML data harvested from it in a website. I've accomplished it so far by creating a XSL file, but encountered some difficulties in the implementation of severals aspects.

Basicly the XML is exported in the structure shown below:

<?xml version="1.0" encoding="UTF-8" ?>
<?xml-stylesheet type="text/xsl" href="gris2.xsl"?>
<OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/
http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd">
<responseDate>2004-11-15T13:21:38Z</responseDate>
<request verb="ListRecords" metadataPrefix="oai_dc">http://resgenchem15.chem.wisc.edu/spt/SPT--OAI.php</request>

<ListRecords>
<record>
<header>
<identifier>oai:jce.divched.org:jcedlib-58</identifier>
<datestamp>2003-06-03</datestamp>
</header>
<metadata>
<oai_dc:dc xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:dc="http://purl.org/dc/elements/1.1/">
<dc:title>Journal of Chemical Education Digital Library</dc:title>
<dc:creator>John W. Moore</dc:creator>
<dc:creator>Jon L. Holmes</dc:creator>
<dc:creator>Edward W. Vitz</dc:creator>
<dc:creator>William F. Coleman</dc:creator>
<dc:creator>Theresa J. Zielinski</dc:creator>
<dc:description>The JCE Digital Library (JCE DLib) was established in 2003 as a result of an NSF grant. It is a part of the NSDL, and initially includes four features: WebWare, DigiDemos, QBank, and SymMath.</dc:description>
<dc:publisher>The Division of Chemical Education, Inc., of the American Chemical Society</dc:publisher>
<dc:date>2003-01-01</dc:date>
<dc:type>Collection</dc:type>
<dc:format>text/html</dc:format>
<dc:identifier>http://jce.divched.org/JCEDLib/</dc:identifier>
<dc:language>en</dc:language>
<dc:relation> isPartOf: ISSN:0021-9584</dc:relation>
<dc:rights>Copyright 2003 by the Division of Chemical Education, Inc., American Chemical Society.</dc:rights>
<dc:subject>Elementary / Middle School</dc:subject>
<dc:subject>High School / Introductory Chemistry</dc:subject>
<dc:subject>First-Year Undergraduate / General</dc:subject>
<dc:subject>Graduate Education / Research</dc:subject>
<dc:subject>General Public</dc:subject>
<dc:subject>Second-Year Undergraduate</dc:subject>
<dc:subject>Upper-Division Undergraduate</dc:subject>
<dc:subject>Continuing Education</dc:subject>
<dc:subject>Analytical Chemistry</dc:subject>
<dc:subject>Chemical Education Research</dc:subject>
<dc:subject>Inorganic Chemistry</dc:subject>
<dc:subject>Laboratory Instruction</dc:subject>
<dc:subject>Physical Chemistry</dc:subject>
<dc:subject>Organic Chemistry</dc:subject>
<dc:subject>Biochemistry</dc:subject>
</oai_dc:dc>
</metadata>
</record>

      <record>
         .
         .
         .
      </record>

   </ListRecords>
</OAI-PMH>

Each record as a certain type, described in "dc:type", which may vary as Paper, Journal, Article, etc;
When harvesting data from the repository, I'll be accessing all the records of a given person, identified in "dc:creator", which returns a XML sorted by "dc:date";

I want to present this data in HTML in a structure similar to the one below:

Type1:

creator, title, date, publisher. (background color for odd row)
creator, title, date, publisher. (background color for even row)

Type2:

creator, title, date, publisher (background color for odd row)
creator, title, date, publisher (background color for even row)

So far I've managed to perform a simple transformation by applying this XSL:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform" exclude-result-prefixes="dc"
xmlns:def="http://www.openarchives.org/OAI/2.0/">
<xsl:output method="html" indent="yes"/>
<xsl:template match="/">
<html>
<head>
<link rel="stylesheet" href="oai.css" type="text/css"/>
</head>
<body id="body">
<xsl:for-each select="//def:record">

<!-- Creator data manipulation --> <xsl:for-each select="def:metadata//dc:creator">
<xsl:value-of select="."/>
,
</xsl:for-each>

<!-- Title manipulation --> <i>
<xsl:value-of select="def:metadata//dc:title"/>
</i>
.
<br/>

<!-- Publisher manipulation --> <xsl:value-of select="def:metadata//dc:publisher"/>
,

<!-- Date manipulation --> <xsl:value-of select="def:metadata//dc:date"/>
.
<br/>
<br/>

</xsl:for-each>

           </body>
       </html>
   </xsl:template>
</xsl:stylesheet>

I've tried to perform the sort by introducing <xsl:sort select="def:metadata//dc:title"> right next to the <xsl:for-each ...> tag but it returned a blank document.
How can I do this sorting of the records and how can I identify if the current record number is even or odd in order to perform diferent customizations?

Sorry for the lenght of the mail and thanks in advance,
Rolando

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