it'll be breeze for ou experts!
Problem:
You recieve a xml message which conforms to a common schema.
Everything is great and your clients (who send you their data based on
this agreed schema), do everything works as agreed and planned.
Over the next few months a few clients suddenly decide to add extra
nodes, therby breaking the schema validation. Then another client does
the same and adds their own nodes to the data. So now you have two
choices:
1. Stop accepting the broken xml.
2. Transform the broken xml into a schema conforming xml, by removing
the error nodes.
The only problem is you don't know what naughty error nodes can show
up at any time. However we know from the schema what nodes are good
and won't break the schema.
Eample:
In the following example how could I make sure only the <GOODNODES>
are kept and all the BADNODES are thrown away (remember there could be
man many BADNODES and to make things worse you just don't know what
they will be called).
In this example I have 2 bad nodes.
<?xml version="1.0" encoding="utf-16"?>
<CLIENTDATA xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ID="LONDON"
VERSION="1.2">
<HEADER>
<OPERATION NAME="PRICE">
<USERNAME>BOBSMITH</USERNAME>
<HOSTNAME>LONDON</HOSTNAME>
</OPERATION>
</HEADER>
<GOODNODE1>
<GOODNODE2 TYPE="MID" USEREDITED="false">
<GOODNODE3>
<CHILD1 TYPE="MID" USEREDITED="false">
<SWAP TYPE="MID" USEREDITED="false">19.16</SWAP>
</CHILD1>
</GOODNODE3>
<BADNODE1 TYPE="MID" USEREDITED="false">
<RUBBISH TYPE="RUBBISH1" USEREDITED="RUBBISH2">0000</RUBBISSH>
</BADNODE1>
<BADNODE2 TYPE="MID" USEREDITED="false">
<RUBBISH TYPE="RUBBISH1" USEREDITED="RUBBISH2">0000</RUBBISSH>
</BADNODE2>
<GOODNODE4>
<CHILD1 TYPE="MID" USEREDITED="false">
<SWAP TYPE="MID" USEREDITED="false">19.16</SWAP>
</CHILD1>
</GOODNODE4>
</GOODNODE2>
</GOODNODE1>
</CLIENTDATA>
The closest I could was to do something like this (close but I get
RUBBISH1RUBBISH2 etc embeded in the result):
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/
Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/
><xsl:template match="@*|CLIENTDATA">
<xsl:copy>
<xsl:choose>
<xsl:when test="name()='CLIENTDATA' ">
<xsl:apply-templates select="@*|node()"/>
</xsl:when>
<xsl:otherwise>
</xsl:otherwise>
</xsl:choose>
</xsl:copy>
</xsl:template>
<xsl:template match="@*|/CLIENTDATA/HEADER">
<xsl:copy>
<xsl:choose>
<xsl:when test="name()='HEADER' ">
<xsl:copy-of select="@*|/CLIENTDATA/HEADER"/>
</xsl:when>
<xsl:otherwise>
</xsl:otherwise>
</xsl:choose>
</xsl:copy>
</xsl:template>
<xsl:template match="text()|@*|/CLIENTDATA/GOODNODE1">
<xsl:copy>
<xsl:choose>
<xsl:when test="name()='GOODNODE1'">
<xsl:apply-templates select="@*|node()"/>
</xsl:when>
<xsl:otherwise>
</xsl:otherwise>
</xsl:choose>
</xsl:copy>
</xsl:template>
<xsl:template match="GOODNODE2">
<xsl:choose>
<xsl:when test="name()='GOODNODE2'">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
<xsl:copy-of select="@*|/CLIENTDATA/GOODNODE1/GOODNODE2/
GOODNODE3"/>
<xsl:copy-of select="@*|/CLIENTDATA/GOODNODE1/GOODNODE2/
GOODNODE4"/>
</xsl:when>
<xsl:otherwise </xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
Is there a more correct and elegant way to do this??????
Thanks in advance
Ted.
