XML-to-XML filter

arvin · July 21st, 2003, 04:09 AM

hi, another question.

i would like to convert an XML document to another XML document with only 2 elements (from "front" and "back") that must be changed (to "start" and "end").

XML doc1:
<book>
<front>
paragraph <tag/> text.
paragraph M&M.
</front>
<back>
<xtag>data</xtag>
 
<ytag>data</ytag>
</back>
</book>

XML doc2:
<book>
<start>
paragraph <tag/> text.
paragraph M&M.
</start>
<end>
<xtag>data</xtag>
 
<ytag>data</ytag>
</end>
</book>

Thanks! ;)

joefawcett · July 21st, 2003, 04:47 AM

The standard procedure is to use the 'identity' template which produces an exact copy and then add on extra template to match the nodes you wish to modify:

Code:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

  <xsl:template match="node()|@*">

    <xsl:copy>

      <xsl:apply-templates select="@*|node()"/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="front">
    <start><xsl:apply-templates/></start>
  </xsl:template>

  <xsl:template match="back">
    <end><xsl:apply-templates/></end>
  </xsl:template>
</xsl:stylesheet>

--

Joe

joefawcett · July 21st, 2003, 05:29 AM

After a little experiment I realised that the two apply-templates in the second and third templates should have a select on them:

Code:

<xsl:template match="front">
    <start><xsl:apply-templates select="@*|node()"/></start>
  </xsl:template>

  <xsl:template match="back">
    <end><xsl:apply-templates select="@*|node()"/></end>
  </xsl:template>

With your given example it didn't matter but it could in others.

--

Joe

arvin · July 21st, 2003, 05:34 AM

thanks again joe! can you kindly recommend what XSLT processor should i use.

joefawcett · July 21st, 2003, 05:44 AM

What's your scenario, i.e. server-side or client-side and which operating system?

--

Joe

arvin · July 21st, 2003, 05:47 AM

client-side, Windows NT

joefawcett · July 21st, 2003, 05:52 AM

If possible use Msxml Core Service 4 with the latest sp (2 I believe). For development download the full sdk which comprises the relevant dlls and a good help file. For clients there is a simple cab file for use in web pages and a merge file if you are using a set up package.

--

Joe

arvin · July 21st, 2003, 05:57 AM

you're a great help joe. thanks a lot!