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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] recursive sub-grouping
 I am stuck on a transformation that requires me to group and sub-group a set of nodes based on their child nodes. My starting XML is as follows: -------------- SOURCE --------------- <?xml version="1.0"?> <video-files> <video-file> <language>English</language> <format>Real</format> <bandwidth>Low</bandwidth> </video-file> <video-file> <language>English</language> <format>Real</format> <bandwidth>High</bandwidth> </video-file> <video-file> <language>English</language> <format>QuickTime</format> <bandwidth>Low</bandwidth> </video-file> <video-file> <language>English</language> <format>QuickTime</format> <bandwidth>High</bandwidth> </video-file> <video-file> <language>French</language> <format>Real</format> <bandwidth>Low</bandwidth> </video-file> <video-file> <language>French</language> <format>Real</format> <bandwidth>High</bandwidth> </video-file> <video-file> <language>French</language> <format>QuickTime</format> <bandwidth>Low</bandwidth> </video-file> <video-file> <language>French</language> <format>QuickTime</format> <bandwidth>High</bandwidth> </video-file> </video-files> ------------------------- And the final XML is to be as follows: ---------- FINAL --------- <?xml version="1.0"?> <languages> <language> <name>English</name> <formats> <format> <name>Real</name> <bandwidths> <bandwidth> <name>High</name> </bandwidth> [...] </bandwidths> </format> [...] </formats> <language> [...] </languages> ----------------------------- I have searched the list for some pointers to a solution for this problem and I have found plenty on grouping and sub-grouping but I have had limited success in applying the techniques to my situation. The initial grouping of the languages is no problem, but I am not sure how to approach the sub-grouping on the current language group into format groups, and then sub-group each of these into the bandwidth groups. I have a feeling that I need to generate keys for the different language/format/bandwidth combinations, but I am not sure how to implement this. For what it's worth my current XSLT is as follows: ------------ XSLT ------------- <?xml version="1.0"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:key name="languages" match="video-file" use="language"/> <xsl:key name="formats" match="video-file" use="concat(language, '+', format)"/> <xsl:key name="bandwidths" match="video-file" use="concat(language, '+', format, '+', bandwidth)"/> <xsl:template match="video-files"> <languages> <xsl:for-each select="video-file[generate-id(.)=generate-id(key('languages', language)[1])]"> <xsl:for-each select="key('languages', language)"> <xsl:sort select="format"/> <language> <xsl:if test="position() = 1"> <name><xsl:value-of select="language"/></name> </xsl:if> <formats> <!--- Need to do sub grouping here --> </formats> </language> </xsl:for-each> </xsl:for-each> </languages > </xsl:template> </xsl:stylesheet> -------------------------------- If anyone has any advice on the best way to approach this problem (XSLT 1.0 only if possible), I would appreciate it. Thanks, Robin 
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