Help on XSLT transformation

li72 · February 22nd, 2008, 12:11 PM

Hi. Guys
I am trying to transform the below xml doc into XForms. The stylesheet contains of two templates. The first is to read the xml doc and copy the instance data. The second is to built up the binding part. Although the binding part is contrasted well (i.e. the instance data has successfully initiated), but it is not functioned as it suppose as to be. in addition, the UI is rendered just fine.
I diagnostic the problem as to do with copying the instance data, this is because if I eliminate the first template and place the instance data by hand, every thing is running just perfect.
Any clue?
Your help is much appreciated

Here is the xml doc.
<?xml version='1.0'?>
<?xml-stylesheet type="text/xsl" href="bind.xsl"?>

<data>
 <node1 null="true" type="integer"> First Node </node1>
 <node2 null="true" type="date" > Second Node </node2>
 <node3 null="false" type="string" > Third Node </node3>
</data>

And here is the stylesheet.
<?xml version='1.0'?>
<xsl:stylesheet version="2.0" xmlns="http://www.w3.org/1999/xhtml"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:ev="http://www.w3.org/2001/xml-events"
xmlns:xforms="http://www.w3.org/2002/xforms/cr"
xmlns:xmml="http://www.xmml.com"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xsl:output method="xhtml" indent="yes"
doctype-public="-//W3C//DTD XHTML 1.0 Transitional//EN"
doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" />

 <xsl:template match="/">

 <html >
 <head> <title>Title comes here </title>
 <xforms:model>
 <xforms:submission action="URL" method="post" />

 <xforms:instance xmlns="">

 <xsl:apply-templates select="data" />
 </xforms:instance>

 <xsl:for-each select="data/*">
 <xsl:call-template name="templatename" />

 <xforms:bind nodeset="{local-name()}"
 required="{concat(@null,'()')}"
 type="{concat('xs:', @type)}"/>
</xsl:for-each>

 </xforms:model>

 </head>
 <body>

 
 <xforms:input ref="node1" > <xforms:label> <xsl:value-of select="data/node1" /> </xforms:label> </xforms:input>
 
 
 <xforms:input ref="node2" > <xforms:label> <xsl:value-of select="data/node2" /> </xforms:label> </xforms:input>
 
 
 <xforms:input ref="node3" > <xforms:label> <xsl:value-of select="data/node3" /> </xforms:label> </xforms:input>
 
 <xforms:submit> <xforms:label> Click here to submit </xforms:label> </xforms:submit> 

 </body>
 </html>
 </xsl:template>

 <xsl:template match="data" >
 <xsl:copy>
 <xsl:copy-of select="data/*"/>
 </xsl:copy>
 </xsl:template>

 <xsl:template match="data" name="templatename">

<xforms:bind>
<xsl:for-each select="data/*">

<xsl:attribute name="nodeset"><xsl:value-of select="local-name()"/></xsl:attribute>
<xsl:attribute name="required"><xsl:value-of select="@null"/>()</xsl:attribute>
<xsl:attribute name="type">xs:<xsl:value-of select="@type"/></xsl:attribute>
</xsl:for-each>
</xforms:bind>
</xsl:template>
 </xsl:stylesheet>

samjudson · February 22nd, 2008, 12:24 PM

You have two templates which match on "data"

<xsl:template match="data" >

and

<xsl:template match="data" name="templatename">

It is not very well defined which of these will be called - it might be either, or an error might be raised depending on the XSLT processor used.

If you are using xsl:call-template, then you don't need to specify the "match" attribute. The following is fine:

<xsl:template name="templatename">

Also, inside the first xsl:template the xsl:copy-of instruction is equivalent to this:

<xsl:copy-of select="./data/*"/>

i.e. it tries to select all 'data' elements that are children of the current node, which is already a 'data' element, so is returning nothing. The following should work fine:

<xsl:copy-of select="*"/>

/- Sam Judson : Wrox Technical Editor -/

li72 · February 22nd, 2008, 12:33 PM

hi. samjudson
thanks a lot. got it.