RE: schema comparer

From: Michael Kay <mike@saxonica.com> Date: Mon, 31 Jan 2005 10:59:46 -0000 To: "'Bryan Rasmussen'" <brs@itst.dk>, <xmlschema-dev@w3.org> Message-Id: <E1CvZHb-0000wa-00@ukmail1.eechost.net>

You're looking for complex types at any level of nesting and then comparing
them by name. Since named complex types can exist only at the top level, it
would be better to select only the top level complex types for this
comparison. Same applies to simple types.

Obviously this whole exercise is pretty rough-and-ready, for example it's
sensitive to differences in namespace prefixes, but I guess that doesn't
stop it being useful in practice.

Michael Kay 

> -----Original Message-----
> From: xmlschema-dev-request@w3.org 
> [mailto:xmlschema-dev-request@w3.org] On Behalf Of Bryan Rasmussen
> Sent: 31 January 2005 10:45
> To: 'xmlschema-dev@w3.org'
> Subject: schema comparer
> 
> 
> Hey 
> 
> I recently had occasion to write a little schema comparer 
> xslt, doesn't do
> everything, and it limits itself to matching structures based 
> on design
> rules for my work, but  I thought I would post it and see if 
> anyone has any
> comments or improvements, or finds it useful:
> 
> <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> xmlns:xsd="http://www.w3.org/2001/XMLSchema"
>  >
> <xsl:output method="xml" indent="yes" />
> <xsl:param name="comparewith" select="'pie/pieComredefines.xsd'"/>
> 
> <xsl:variable name="doc" select="document($comparewith)"/>
> <xsl:template match="/">
> <html><head></head>
> <body>
> <h3/>
> <h3>Complex Type differences</h3>
> <ol>
> <xsl:apply-templates select="//xsd:complexType"/>
> </ol>
> <hr/>
> <h3>ComplexTypes that are added</h3>
> 
> <ol>
> <xsl:apply-templates select="//xsd:complexType" 
> mode="difftypesmode1"/>
> </ol>
> <hr/>
> <h3>SimpleTypes that are added</h3>
> <ol>
> <xsl:apply-templates select="//xsd:simpleType" mode="difftypesmode1"/>
> </ol>
> 
> </body></html>
> </xsl:template>
> 
> <xsl:template match="xsd:complexType" mode="difftypesmode1">
> <xsl:variable name="locname" select="@name"/>
> <xsl:if test="not($doc//xsd:complexType[@name=$locname])">
> <li>the complex type <xsl:value-of select="@name"/> was not 
> found in the
> original document: <xsl:apply-templates
> select="//xsd:element[contains(@type,$locname)]" 
> mode="difftypesanalyze"/> ,
> the structure is <xmp><xsl:copy-of select="."/></xmp></li>
> </xsl:if>
> </xsl:template>
> 
> <xsl:template match="xsd:simpleType" mode="difftypesmode1">
> <xsl:variable name="locname" select="@name"/>
> <xsl:if test="not($doc//xsd:simpleType[@name=$locname])">
> <li>the simple type <xsl:value-of select="@name"/> was not 
> found in the
> original document</li>
> </xsl:if>
> </xsl:template>
> <xsl:template match="*">
> <xsl:param name="locname"/>
> <xsl:apply-templates><xsl:with-param name="locname"
> select="$locname"/></xsl:apply-templates>
> </xsl:template>
> 
> <xsl:template match="xsd:complexType">
> <xsl:variable name="locname" select="@name"/>
> <xsl:apply-templates><xsl:with-param name="locname"
> select="$locname"/></xsl:apply-templates>
> </xsl:template>
> 
> <xsl:template match="xsd:element[ancestor::xsd:complexType]">
> <xsl:param name="locname"/>
> <xsl:variable name="minOccurs" select="@minOccurs"/>
> <xsl:variable name="maxOccurs" select="@maxOccurs"/>
> <xsl:variable name="refOrName" select="concat(@name,@ref)"/>
> <xsl:variable name="selectMin"
> select="$doc//xsd:complexType[@name=$locname]//xsd:element[@na
> me=$refOrName
> or @ref = $refOrName]/@minOccurs"/>
> <xsl:variable name="selectMax"
> select="$doc//xsd:complexType[@name=$locname]//xsd:element[@na
> me=$refOrName
> or @ref = $refOrName]/@maxOccurs"/>
> 
> <xsl:if test="$maxOccurs != $selectMax or $minOccurs != $selectMin">
> 
> <li>element <xsl:value-of select="$refOrName"/> at <xsl:value-of
> select="position()"/> under <xsl:value-of select="$locname"/> 
> is changed:
> current max = <xsl:value-of select="$maxOccurs"/>, old max = 
> <xsl:value-of
> select="$selectMax"/>, current min = <xsl:value-of 
> select="$minOccurs"/>,
> old min = <xsl:value-of select="$selectMin"/></li>
> </xsl:if>
> </xsl:template>
> 
> <xsl:template match="xsd:element" mode="difftypesanalyze">
> it is used by global element <xsl:value-of select="@name"/>
> </xsl:template>
> 
> <xsl:template match="xsd:element[ancestor::xsd:complexType]"
> mode="difftypesanalyze">
> it is used under <xsl:value-of 
> select="ancestor::xsd:complexType/@name"/> ,
> in element <xsl:value-of select="@name"/>, at position <xsl:value-of
> select="count(preceding-sibling::xsd:element) + 1"/>
> </xsl:template>
> 
> </xsl:stylesheet>
> 


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