Convert Pentabarf schedule.xml to mediawiki table

to_mediawiki.xsl

<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

	<xsl:output method="text" indent="no" encoding="utf-8" />

	<xsl:template match='text()|@*' />

	<xsl:template match="event">
|-		
| ? || ? || FOSSGIS2011-<xsl:value-of select="@id" />-<xsl:value-of select="normalize-space(language)" /><xsl:if test="not(normalize-space(language))">de</xsl:if>-<xsl:value-of select="slug" /> || <xsl:value-of select="title" /> || <xsl:for-each select="persons/person"><xsl:value-of select="." /><xsl:text> </xsl:text></xsl:for-each> || <xsl:value-of select="../../@date" /><xsl:text> </xsl:text><xsl:value-of select="start" /> || <xsl:value-of select="room" /> 
    </xsl:template>

</xsl:transform>

Created for video recordings of the FOSSGIS 2011 conference.
Modification of https://gist.github.com/524185
Run with "xsltproc to_mediawiki.xsl schedule.de.xml"