Re: XML transformation to RDF with XSLT help

<gemq:catalogingOrganization>
	<foaf:name>Learn North Carolina</foaf:name>
	<foaf:phone>919-962-8888</foaf:phone>
	<foaf:homepage>http://www.learnnc.org</foaf:homepage>
	<foaf:mbox>mailto:mthibault@xxxxxxxxxxx</foaf:mbox>
</gemq:catalogingOrganization>

Best regards,
Oknam Park

From: "Eric BrC)chemier" <eric.brechemier@xxxxxxxxx>
Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re:  XML transformation to RDF with XSLT help
Date: Wed, 3 May 2006 09:33:51 +0200

Hi Oknam,

First, thank you for the details of your xml input, expected output,
and current status of your xslt stylesheet. You should just add what
gets you stuck, which would help people understand your problem
quicker :)

The typical way of handling three different outputs depending on
different inputs is to write a different template rule (xsl:template)
for each one, with three different corresponding XPath expressions. In
your case, just translate your requirements to XSLT:

I need to transform this to rdf like this
With xsi:type="dcterms:URI"
<rdf:Description>
    <gemq:teachingMethods
rdf:resource="http://purl.org/gem/instance/GEM-TM/#PeerTutoring"/>
  </rdf:Description>

<xsl:template match="gemq:teachingMethods[@xsi:type='dcterms:URI']">
 <rdf:Description>
   <gemq:teachingMethods rdf:resource="{normalize-space(.)}"/>
 </rdf:Description>
</xsl:template>

With xsi:type="gemq:GEM-TM"
<rdf:Description>
<gemq:teachingMethods>
   <gemq:GEM-TM>
     <rdf:value>Thematic approach</rdf:value>
     <rdfs:label>Thematic approach</rdfs:label>
   </gemq:GEM-TM>
</gemq:teachingMethods>
</rdf:Description>

<xsl:template match="gemq:teachingMethods[@xsi:type='gemq:GEM-TM']">
 <rdf:Description>
   <gemq:teachingMethods>
     <gemq:GEM-TM>
       <rdf:value>Thematic approach</rdf:value>
       <rdfs:label>Thematic approach</rdfs:label>
     </gemq:GEM-TM>
   </gemq:teachingMethods>
 </rdf:Description>
</xsl:template>

And with just free-text
<rdf:Description>
    <gemq:teachingMethods>MultimediaInstruction</dc:identifier>
  </rdf:Description>

<xsl:template match="gemq:teachingMethods">
 (... You get the point ...)
</xsl:template>

This last rule will be applied when the two previous ones don't match.
The job of the XSLT processor is to choose the most specific template
matching your input (based on the match attribute), so you generally
don't need to write this kind of "xsl:choose" explicitly.

The problems I expect with the XSLT you wrote are:

- you cannot create attributes before you create the parent element:
your xsl:attribute instructions should appear inside the block
<gemq:teachingMethods>(...)</gemq:teachingMethods>

- the "test" expressions do not match your requirements
(not[@xsi:type] won't match elements with "xsi:type="gemq:GEM-TM")

I hope that helps,
Best regards,

Eric BrC)chemier

On 5/3/06, oknam park <ponda7777@xxxxxxxxxxx> wrote:

Hello.
I'm working on a xml transformation to RDF with XSLT help.

I'm totally very new to XSLT. And It's hard and I'm stuck now. I need your
help.

Here are xml element representation with three ways.
<gemq:teachingMethods
xsi:type='dcterms:URI'>http://purl.org/gem/instance/GEM-TM/#PeerTutoring</gemq:teachingMethods>
<gemq:teachingMethods xsi:type='gemq:GEM-TM'>Thematic
approach</gemq:teachingMethods>
<gemq:teachingMethods>MultimediaInstruction</gemq:teachingMethods>

I need to transform this to rdf like this
With xsi:type="dcterms:URI"
<rdf:Description>
    <gemq:teachingMethods
rdf:resource="http://purl.org/gem/instance/GEM-TM/#PeerTutoring"/>
  </rdf:Description>

With xsi:type="gemq:GEM-TM"
<rdf:Description>
<gemq:teachingMethods>
   <gemq:GEM-TM>
     <rdf:value>Thematic approach</rdf:value>
     <rdfs:label>Thematic approach</rdfs:label>
   </gemq:GEM-TM>
</gemq:teachingMethods>
</rdf:Description>

And with just free-text
<rdf:Description>
    <gemq:teachingMethods>MultimediaInstruction</dc:identifier>
  </rdf:Description>

I did xslt with
<xsl:template match="gemq:teachingMethods">
<xsl:choose>
<xsl:when test="contains(@xsi:type, 'dcterms:URI')">
<xsl:attribute name="rdf:resource">
<xsl:value-of select="normalize-space(.)"/>
</xsl:attribute>
</xsl:when>
<xsl:when test="not[@xsi:type]">
<xsl:attribute name="rdf:resource">
<xsl:value-of select="normalize-space(.)"/>
</xsl:attribute>
</xsl:when>
<xsl:otherwise>
<gemq:teachingMethods>
<xsl:value-of select="normalize-space(.)"/>
</gemq:teachingMethods>
</xsl:otherwise>
</xsl:choose>
</xsl:template>

Could you give me some tips or advice?

I appreciate it.

Thanks a lot,

Best regards,
Oknam