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Subject: Re: Merging XML From: Tom Mullen <Tom.Mullen@xxxxxxxxxxx> Date: Fri, 04 Aug 2000 14:20:55 +0000 (GMT) |
Josh, using the examples you gave: >1.xml: > <A> > <B name="123"> > <C> > <D> > <E>val 1</E> > </D> > </C> > <G>1</G> > </B> > </A> >2.xml: > <A> > <B name="123"> > <H> > <F> > Val3 > </F> > </H> > <C> > <D> > <E> Val2 </E> > </D> > </C> > </B> > </A> > > >If I rearrange the order to put <A><B><C>.. instead of <A><B><H>.. >it works. > Then the following xsl doc treats both 2) and its rearranged form the same. A few warnings: 1) Anybody who knows anything about XSL will recognise this as being written by a newbie. (any comments at all on it would be most welcome) 2) I think there needs to be some form of ignore whitespace setting (I get that there is a difference in B when there isn't) 3) This xsl only works with the format of the XML documents above. I think a generic solution would be an order of magnitude more difficult (anybody prepared to take up the gauntlet?). 4) Only a difference html is produced, I haven't got round to installing <xsl:copy> and/or <xsl:copy-of> at the appropriate points. However, this example should explain the approach a little more clearly. 5) Apologies in advance for the lack of comments <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.0"> <xsl:param name="oldfile" /> <xsl:variable name="old" select="document($oldfile)" /> <xsl:variable name="new" select="/" /> <xsl:template match="/A"> <html> <head><title>Comparison</title></head> <body> <h1>Comparison</h1> <xsl:comment><xsl:value-of select="$new/"/></xsl:comment> <xsl:comment><xsl:value-of select="$old/"/></xsl:comment> <xsl:comment><xsl:value-of select="$oldfile"/></xsl:comment> <xsl:call-template name="compall"> <xsl:with-param name="new" select="$new" /> <xsl:with-param name="old" select="$old" /> </xsl:call-template> </body> </html> </xsl:template> <xsl:template name="compall"> <xsl:param name="old" /> <xsl:param name="new" /> <xsl:variable name="oldval" select="$old/text()"/> <xsl:variable name="newval" select="$new/text()"/> <xsl:if test="not((string-length($oldval)=string-length($newval)) and contains($oldval,$newval))"> <xsl:comment>different vals</xsl:comment> <xsl:variable name="oldname" select="name($old)" /> <xsl:variable name="newname" select="name($new)" /> <p>Altered NEW:<xsl:value-of select="$newname"/>=<xsl:value-of select="$newval"/></p> <p>Altered OLD:<xsl:value-of select="$oldname"/>=<xsl:value-of select="$oldval"/></p> </xsl:if> <xsl:call-template name="list-additional"> <xsl:with-param name="head">Added:</xsl:with-param> <xsl:with-param name="more" select="$new" /> <xsl:with-param name="less" select="$old" /> </xsl:call-template> <xsl:call-template name="list-additional"> <xsl:with-param name="head">Removed:</xsl:with-param> <xsl:with-param name="more" select="$old" /> <xsl:with-param name="less" select="$new" /> </xsl:call-template> <xsl:call-template name="list-compare"> <xsl:with-param name="old" select="$old" /> <xsl:with-param name="new" select="$new" /> </xsl:call-template> </xsl:template> <xsl:key name="logs" match="B" use="@name" /> <xsl:template name="list-additional"> <xsl:param name="head" /> <xsl:param name="more" /> <xsl:param name="less" /> <ul> <xsl:if test="$more/B"> <xsl:for-each select="$more/B"> <xsl:variable name="item" select="." /> <!-- select the 'less' document so that the key indexes into that document --> <xsl:for-each select="$less"> <xsl:if test="not(key('logs', $item/@name))"> <xsl:comment><xsl:value-of select="$item"/></xsl:comment> <li><xsl:value-of select="$head"/><xsl:apply-templates select="$item" mode="describe" /></li> </xsl:if> </xsl:for-each> </xsl:for-each> </xsl:if> <xsl:for-each select="$more/*"> <xsl:variable name="item" select="." /> <xsl:variable name="itemname" select="name(.)" /> <xsl:choose> <xsl:when test="self::B"/> <xsl:otherwise> <xsl:comment>looking for <xsl:value-of select="$itemname"/></xsl:comment> <xsl:choose> <xsl:when test="$less/*[name()=name($item)]"/> <xsl:otherwise> <xsl:comment><xsl:value-of select="$item"/></xsl:comment> <li><xsl:value-of select="$head"/><xsl:apply-templates select="$item" mode="describe" /></li> </xsl:otherwise> </xsl:choose> </xsl:otherwise> </xsl:choose> </xsl:for-each> </ul> </xsl:template> <xsl:template name="list-compare"> <xsl:param name="old" /> <xsl:param name="new" /> <xsl:variable name="oldname" select="name($old)" /> <xsl:variable name="newname" select="name($new)" /> <ul> <xsl:if test="$old/B"> <xsl:for-each select="$old/B"> <xsl:variable name="old2" select="." /> <xsl:for-each select="$new"> <xsl:if test="key('logs', $old2/@name)"> <xsl:variable name="new2" select="key('logs', $old2/@name)"/> <xsl:call-template name="compall"> <xsl:with-param name="new" select="$new2" /> <xsl:with-param name="old" select="$old2" /> </xsl:call-template> </xsl:if> </xsl:for-each> </xsl:for-each> </xsl:if> <xsl:for-each select="$old/*"> <xsl:variable name="old2" select="." /> <xsl:variable name="old2name" select="name(.)" /> <xsl:choose> <xsl:when test="self::B"/> <xsl:otherwise> <xsl:comment>looking for <xsl:value-of select="$old2name"/></xsl:comment> <xsl:variable name="new2" select="$new/*[name()=$old2name]"/> <xsl:if test="$new/*[name()=name($old2)]"> <xsl:variable name="newval" select="$new2/self::text()"/> <xsl:variable name="oldval" select="$old2/self::text()"/> <xsl:comment>New val=<xsl:value-of select="$newval"/>Old val=<xsl:value-of select="$oldval"/></xsl:comment> <xsl:call-template name="compall"> <xsl:with-param name="new" select="$new2" /> <xsl:with-param name="old" select="$old2" /> </xsl:call-template> </xsl:if> </xsl:otherwise> </xsl:choose> </xsl:for-each> </ul> </xsl:template> <xsl:template match="*" mode="describe"> <xsl:value-of select="name()" /><xsl:text>=</xsl:text><xsl:value-of select="text()" /> </xsl:template> <xsl:template match="B" mode="describe"> <xsl:text>B-</xsl:text><xsl:value-of select="@name" /> </xsl:template> </xsl:stylesheet> Thanks Tom 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