Just be careful not to re-invent the wheel. The W3C has a recommended[1] way to extract RDF from XHTML. This same idea can be applied for XML (and just about anything else for that matter).
[1] - http://www.w3.org/TeamSubmission/grddl/ Abramo Bagnara wrote: >Taken for granted that a microformat is a way to embed data inside xhtml >presentation, last night I was wondering if really it was unavoidable to >have so many different formats with complex rules and nasty exceptions. > >>From this thinking I've tried to develop a little proposal to embed >arbitrary xml data inside xhtml and that may be extracted easily and >without ambiguities while leaving total freedom on data presentation. > >My main interest was something similar to hcalendar to overcome current >limitations of this microformat wrt params. > >This is the reason why you find that the attached test is for calendar >data, but my proposal should be general enough to permit embedding of >*any* xml data. > >The attached stylesheet is for extraction of data in xml form, but it >might be easily modified to extract data in xCalendar or iCalendar >format (that maps 1:1 to xml). > > > >------------------------------------------------------------------------ > ><?xml version="1.0" encoding="ISO-8859-1"?> ><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" >"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";> ><html xmlns="http://www.w3.org/1999/xhtml";> > <head> > <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /> > <title>Test</title> > <link type="text/css" rel="stylesheet" href="../../html/project.css" /> > </head> > <body class="xx:vcalendar="> > <div class="xx:vtodo="> > <h2 class="xx:summary">Task di test</h2> > <div> > <span class="header">Location: </span> > <span class="xx:location">Location</span> > </div> > <div> > <b>Due date: </b> > <abbr class="xx:[EMAIL PROTECTED]" title="20051130">30-11-2005</abbr> > </div> > <div class="xx:description"> > <div class="ancestor-summary">Test</div> > <ol class="disc"> > <li> > <div class="node-summary"> > <a href="edit:/u/dothert/data/abramo/test.txt##18">Task di > test</a> > </div> > <div class="node-location">Location</div> > <div class="node-description"> > <p>Descrizione sotto divisa in paragrafi di una certa lunghezza > di una >certa lunghezza di una certa <b>lunghezza</b> di una certa lunghezza di una >certa lunghezza di una certa lunghezza</p> > <p>Descrizione sotto divisa in paragrafi di una certa lunghezza > di una >certa lunghezza di una certa lunghezza di una certa lunghezza di una >certa lunghezza di una certa lunghezza</p> > <p>Descrizione sotto divisa in paragrafi di una certa lunghezza > di una >certa lunghezza di una certa lunghezza di una certa lunghezza di una >certa lunghezza di una certa lunghezza</p> > </div> > </li> > </ol> > <p>Descrizione della deadline</p> > <p>Descrizione sotto divisa in paragrafi di una certa lunghezza di una >certa lunghezza di una certa lunghezza di una certa lunghezza di una >certa lunghezza di una certa lunghezza</p> > <p>Descrizione sotto divisa in paragrafi di una certa lunghezza di una >certa lunghezza di una certa lunghezza di una certa lunghezza di una >certa lunghezza di una certa lunghezza</p> > </div> > <div><span class="header">Categories: </span><span > class="xx:categories">a</span>, <span class="xx:categories">a:b</span>, <span > class="xx:categories">a:b:c</span>, <span > class="xx:categories">ismaele</span>, <span > class="xx:categories">ismaele:opt</span>, <span > class="xx:categories">licia</span>, <span > class="xx:categories">licia:opt</span>, <span > class="xx:categories">abramo</span>, <span > class="xx:categories">abramo:cha</span>, <span > class="xx:categories">test</span>, <span > class="xx:categories">abramo</span></div> > <div> > <span class="header">Priority: </span> > <abbr class="xx:[EMAIL PROTECTED]" title="0">not specified</abbr> > </div> > <div> > <span class="header">Presidente: </span> > <span class="xx:attendee="> > <abbr class="xx:@[EMAIL PROTECTED]" title="chair"></abbr> > <a class="xx:@cn xx:[EMAIL PROTECTED]" href="mailto:[EMAIL > PROTECTED]">Abramo Bagnara</a> > </span> > </div> > <div> > <span class="header">Partecipanti opzionali: </span> > <span class="xx:attendee="> > <abbr class="xx:@[EMAIL PROTECTED]" title="opt-participant"></abbr> > <a class="xx:@cn xx:[EMAIL PROTECTED]" href="mailto:";>Ismaele > Bagnara</a> > </span>, <span class="xx:attendee="><abbr class="xx:@[EMAIL PROTECTED]" > title="opt-participant"></abbr> > <a class="xx:@cn xx:[EMAIL PROTECTED]" href="[EMAIL PROTECTED]">Licia > Tabanelli</a></span></div> > </div> > </body> ></html> > > >------------------------------------------------------------------------ > ><?xml version="1.0"?> ><xsl:stylesheet version="1.0" > xmlns:xsl="http://www.w3.org/1999/XSL/Transform";> > ><!-- ><xsl:stylesheet version="1.0" > xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; > xmlns:dyn="http://exslt.org/dynamic"; > extension-element-prefixes="dyn"> >--> > ><!-- > Extract xml embedded in xhtml. > First draft. > > Copyright 2005 Abramo Bagnara <[EMAIL PROTECTED]> >--> > ><xsl:output method="xml" > indent="yes"/> > ><xsl:variable name="prefix" select="' xx:'"/> > ><!-- ><xsl:template name="dyn-evaluate"> > <xsl:param name="xpath"/> > <xsl:for-each select="dyn:evaluate($xpath)"> > <xsl:value-of select="."/> > </xsl:for-each> ></xsl:template> >--> > ><xsl:template name="dyn-evaluate"> > <xsl:param name="xpath"/> > <xsl:choose> > <xsl:when test="$xpath='.//text()'"> > <xsl:for-each select=".//text()"> > <xsl:value-of select="."/> > </xsl:for-each> > </xsl:when> > <xsl:when test="$xpath='text()'"> > <xsl:for-each select="text()"> > <xsl:value-of select="."/> > </xsl:for-each> > </xsl:when> > <xsl:when test="starts-with($xpath,'@')"> > <xsl:value-of select="@*[name()=substring($xpath,2)]"/> > </xsl:when> > <xsl:otherwise> > <xsl:for-each select="*[name()=$xpath]"> > <xsl:value-of select="."/> > </xsl:for-each> > </xsl:otherwise> > </xsl:choose> ></xsl:template> > ><xsl:template name="evaluate"> > <xsl:param name="xpath"/> > <xsl:if test="$xpath != ''"> > <xsl:call-template name="dyn-evaluate"> > <xsl:with-param name="xpath" select="$xpath"/> > </xsl:call-template> > </xsl:if> ></xsl:template> > ><!-- >class : destination > | destination '=' source > ; > >prefix : 'xx:' ; > >destination : name > | '@' name > ; > >source : '' > | xpath > ; >--> > ><xsl:template name="extract"> > <xsl:param name="classes"/> > <xsl:variable name="c" select="substring-after(concat(' > ',$classes),$prefix)"/> > <xsl:choose> > <xsl:when test="$c = ''"> > <xsl:apply-templates/> > </xsl:when> > <xsl:otherwise> > <xsl:variable name="class" select="substring-before(concat($c,' '),' > ')"/> > <xsl:variable name="destination" > select="substring-before(concat($class,'='),'=')"/> > <xsl:variable name="source"> > <xsl:choose> > <xsl:when test="contains($class,'=')"> > <xsl:value-of select="substring-after($class,'=')"/> > </xsl:when> > <xsl:otherwise>.//text()</xsl:otherwise> > </xsl:choose> > </xsl:variable> > <xsl:choose> > <xsl:when test="$destination = ''"> > <xsl:call-template name="evaluate"> > <xsl:with-param name="xpath" select="$source"/> > </xsl:call-template> > <xsl:call-template name="extract"> > <xsl:with-param name="classes" select="substring-after($c,' ')"/> > </xsl:call-template> > </xsl:when> > <xsl:when test="starts-with($destination,'@')"> > <xsl:attribute name="{substring($destination,2)}"> > <xsl:call-template name="evaluate"> > <xsl:with-param name="xpath" select="$source"/> > </xsl:call-template> > </xsl:attribute> > <xsl:call-template name="extract"> > <xsl:with-param name="classes" select="substring-after($c,' ')"/> > </xsl:call-template> > </xsl:when> > <xsl:otherwise> > <xsl:element name="{$destination}"> > <xsl:call-template name="evaluate"> > <xsl:with-param name="xpath" select="$source"/> > </xsl:call-template> > <xsl:call-template name="extract"> > <xsl:with-param name="classes" select="substring-after($c,' ')"/> > </xsl:call-template> > </xsl:element> > </xsl:otherwise> > </xsl:choose> > </xsl:otherwise> > </xsl:choose> ></xsl:template> > ><xsl:template match="[EMAIL PROTECTED]"> > <xsl:call-template name="extract"> > <xsl:with-param name="classes" select="@class"/> > </xsl:call-template> ></xsl:template> > ><xsl:template match="text()"/> > ></xsl:stylesheet> > > >------------------------------------------------------------------------ > >_______________________________________________ >microformats-discuss mailing list >[email protected] >http://microformats.org/mailman/listinfo/microformats-discuss > > _______________________________________________ microformats-discuss mailing list [email protected] http://microformats.org/mailman/listinfo/microformats-discuss
