Summary This example stylesheet analyzes and summarizes any given XML document.

This stylesheet can be used to take any given XML document and produce a summarized version of it.  It is not designed as a pre-cursor for creating a schema or DTD from a document - as it does not deal with the complexities of that process (i.e. it does not concern itself with element orders and choices; it does not analyze element or attribute values).  The stylesheet merely serves to take a complex XML document and produce a crude summary of the structure - removing repeated structures and aggregrating similar structures.

The stylesheet uses a two pass system - the first pass building a pre-analyzed RTF (Result Tree Fragment) and the second pass summarizing that RTF.  As there is no way in XSLT1.0 to convert RTFs to node-sets the stylesheet uses extension namespaces and three versions are supplied (Microsoft, Xalan and Saxon).

Please see the download zip file for the stylesheets.

Cheers
Marrow
http://www.MarrowSoft.com - home of Xselerator (XSLT IDE and debugger)
http://www.TopXML.com/Xselerator

Additional information

<?xml version="1.0"?> <!-- ======================================================== --> <!-- Stylesheet: Analyzer12.xsl --> <!-- Version: 1.3 MS (2002-06-24) --> <!-- Purpose: Analyse the structure of any given input XML --> <!-- document - outputting the distinct elements --> <!-- (according to their path). --> <!-- ======================================================== --> <!-- Copyright: (c)2002 MarrowSoft Limited --> <!-- ALL RIGHTS RESERVED. --> <!-- This stylesheet may be used within an --> <!-- application - but must not be modified or --> <!-- published in any way without the prior --> <!-- prior written consent of MarrowSoft Ltd. --> <!-- ======================================================== --> <xsl:stylesheet version="1.0" exclude-result-prefixes="msxsl analyzed" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:analyzed="urn:analysis-of-xml-structure"> <!-- param for test purposes --> <xsl:param name="test"></xsl:param> <!-- key for selecting nodes by their parent path --> <xsl:key name="kByPath" match="*" use="@analyzed:parent-path"/> <!-- key for selecting distinct nodes by their path --> <xsl:key name="kDistinctPath" match="*" use="@analyzed:path"/> <!-- attribute set used to add pathing info attributes --> <xsl:attribute-set name="get-paths"> <!-- add attribute containing the path of this element --> <xsl:attribute name="analyzed:path" namespace="urn:analysis-of-xml-structure"> <xsl:apply-templates select="ancestor-or-self::*" mode="analyze-path"/> </xsl:attribute> <!-- add attribute containing the path of parent of this element --> <xsl:attribute name="analyzed:parent-path" namespace="urn:analysis-of-xml-structure"> <xsl:apply-templates select="ancestor::*" mode="analyze-path"/> </xsl:attribute> </xsl:attribute-set> <!-- attribute set used to add pathing info attributes (for attributes) --> <xsl:attribute-set name="get-att-paths"> <!-- add attribute containing the path of this element --> <xsl:attribute name="analyzed:path" namespace="urn:analysis-of-xml-structure"> <xsl:apply-templates select="ancestor-or-self::*" mode="analyze-path"/> <xsl:text>/@</xsl:text> <xsl:value-of select="name()"/> </xsl:attribute> <!-- add attribute containing the path of parent of this element --> <xsl:attribute name="analyzed:parent-path" namespace="urn:analysis-of-xml-structure"> <xsl:apply-templates select="ancestor::*" mode="analyze-path"/> </xsl:attribute> </xsl:attribute-set> <!-- =============================== --> <!-- Document root handling template --> <xsl:template match="/"> <!-- build RTF --> <xsl:variable name="raw-rtf"> <xsl:copy> <xsl:apply-templates select="*|@*" mode="build-rtf"/> </xsl:copy> </xsl:variable> <!-- convert RTF to node-set --> <xsl:variable name="first-pass" select="msxsl:node-set($raw-rtf)"/> <!-- test or live execution --> <xsl:choose> <xsl:when test="$test"> <!-- test first pass output --> <xsl:copy-of select="$first-pass"/> </xsl:when> <xsl:otherwise> <!-- process distinct paths on second pass --> <xsl:apply-templates select="$first-pass" mode="output"/> </xsl:otherwise> </xsl:choose> </xsl:template> <!-- ====================================== --> <!-- Template for building RTF for elements --> <xsl:template match="*" mode="build-rtf"> <xsl:element name="{name()}" namespace="{namespace-uri()}" use-attribute-sets="get-paths"> <xsl:attribute name="analyzed:type" namespace="urn:analysis-of-xml-structure">E</xsl:attribute> <xsl:apply-templates select="*|@*" mode="build-rtf"/> </xsl:element> </xsl:template> <!-- ====================================== --> <!-- Template for building RTF for elements --> <xsl:template match="@*" mode="build-rtf"> <xsl:element name="{name()}" namespace="{namespace-uri()}" use-attribute-sets="get-att-paths"> <xsl:attribute name="analyzed:type" namespace="urn:analysis-of-xml-structure">A</xsl:attribute> </xsl:element> </xsl:template> <!-- ===================================== --> <!-- Template for creating path attributes --> <xsl:template match="*" mode="analyze-path"> <xsl:value-of select="name()"/> <xsl:if test="position() != last()"> <xsl:text>/</xsl:text> </xsl:if> </xsl:template> <!-- ================================================== --> <!-- Template for handling root on second (output) pass --> <xsl:template match="/" mode="output"> <!-- root only ever has one child --> <xsl:apply-templates select="*" mode="output"/> </xsl:template> <!-- ================================================================= --> <!-- Template for distinct elements/attributes on second (output) pass --> <xsl:template match="*" mode="output"> <xsl:choose> <xsl:when test="@analyzed:type = 'A'"> <!-- output this attribute --> <xsl:attribute name="{name()}" namespace="{namespace-uri()}"/> <!-- NB. no apply on children as attributes can't have children --> </xsl:when> <xsl:otherwise> <!-- output this distinct element --> <xsl:element name="{name()}" namespace="{namespace-uri()}"> <!-- out all distinct elements that have this same parental path --> <xsl:apply-templates select="key('kByPath',@analyzed:path)[generate-id() = generate-id(key('kDistinctPath',@analyzed:path))~" mode="output"> <!-- order them by their type and original position within their parent --> <xsl:sort select="@analyzed:type"/> <xsl:sort select="count(preceding-sibling::*)" data-type="number"/> </xsl:apply-templates> </xsl:element> </xsl:otherwise> </xsl:choose> </xsl:template> </xsl:stylesheet>

Further additional information

<!-- any xml document you wish to analyze and summarize -->

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