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May 2nd, 2007, 09:00 AM
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XPath & XSLT problem
Hello there,
my name is Andy and I a newbie-XSLT-starter along with a problem here. I presume that is pretty simple one, but stuck with it for a couple of days... 
How do I query a namespaced element like this (bolded it out)?
Code:
<identity>
<dataIdentity>
<title xsi:type="PT_FreeText_PropertyType">
<gco:CharacterString>Dataset No17, 2004</gco:CharacterString>
<PT_FreeText>
<textGroup >
<LocalisedCharacterString locale="#xpointer(//*[@id='hu'])">Hungary language, 2004</LocalisedCharacterString>
</textGroup>
<textGroup>
<LocalisedCharacterString locale="#xpointer(//*[@id='fi'])">Finland language, 2004</LocalisedCharacterString>
</textGroup>
</PT_FreeText>
</title>
</dataIdentity>
</identity>
I try to query it the following way:
Code:
<xsl:template match="/">
<html>
<body>
<h3>Document</h3>
<table border="1">
<tr bgcolor="#ff9900">
<th align="left">Data</th>
</tr>
<tr>
<td> <xsl:value-of select="//title/gco:CharacterString"/></td>
</tr>
</table>
</body>
</html>
</xsl:template>
And got no luck. Everything is fine as long as the element is wrapped without any namespaces, like this (assuming title wasn't empty):
Code:
"//identity/dataIdentity/title/text()"
Any input or guidelines would be appreciated.
Thank your for reading.
Andy
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May 2nd, 2007, 09:38 AM
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Wrox Author
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Join Date: Jun 2003
Posts: 3,074
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Read the first post in this forum to get the link about namespaces. As you're beginning now is the time to get out of the habit of starting paths with //, it's an expensive search. Just use /identity/dataIdentity/title/text() but with the namespace prefix added.
--
Joe ( Microsoft MVP - XML)
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May 2nd, 2007, 01:10 PM
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Wrox Author
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Posts: 4,962
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What you are doing is fine. Of course the stylesheet needs to contain a declaration of the gco namespace, that is something like
xmlns:gco="....."
where the namespace URI matches what's declared in the source document.
Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference
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May 3rd, 2007, 12:51 AM
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Joe,
I've read couple of links about namespaces. And I do know the expensiveness of using //. I prefer doing the task first, then optimizing it.
Michael,
the namespace is declared as follows:
Code:
<xsl:stylesheet version="1.0"
other declarations...
xmlns:gco="http://www.isotc211.org/2005/gco">
Any other ideas?
Just got O'Reilly's XSLT book, will try to deal with the problem.
Thanks.
Andy
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May 3rd, 2007, 01:18 AM
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Wrox Author
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Join Date: Apr 2004
Posts: 4,962
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At this point the best strategy is to post a complete but minimal source document and stylesheet that illustrates the problem, it should then be easy to see what you are doing wrong.
Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference
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May 3rd, 2007, 01:41 AM
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This is the XML document, based on ISO11519. Didn't feel like posting the whole document is necessary. And... don't worry -- the doc is well-formed.
OK, here we go. The XML file:
Code:
<?xml version="1.0" encoding="ISO-8859-2"?>
<?xml-stylesheet type="text/xsl" href="md_gos.xsl"?>
<MD_Metadata
xmlns="http://www.isotc211.org/2005/gmd"
xmlns:gco="http://www.isotc211.org/2005/gco"
xmlns:gml="http://www.opengis.net/gml"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.isotc211.org/2005/gmd C:/ISO19139schemas/gmd/gmd.xsd
http://www.isotc211.org/2005/gco C:/ISO19139schemas/gco/gco.xsd
http://www.opengis.net/gml C:/ISO19139schemas/gml/gml.xsd
http://www.w3.org/1999/xlink C:/ISO19139schemas/xlink/xlinks.xsd">
<fileIdentifier>
<gco:CharacterString>MD_gos00021</gco:CharacterString>
</fileIdentifier>
<language>
<gco:CharacterString>en</gco:CharacterString>
</language>
<characterSet>
<MD_CharacterSetCode codeListValue="8859part2" codeList="./resources/codeList.xml#MD_CharacterSetCode">8859part2</MD_CharacterSetCode>
</characterSet>
<hierarchyLevel>
<MD_ScopeCode codeList="./resources/codeList.xml#MD_ScopeCode" codeListValue="dataset">dataset</MD_ScopeCode>
</hierarchyLevel>
<contact xlink:href="CI_RP-sores.xml">
<CI_ResponsibleParty>
<individualName>
<gco:CharacterString>Sõrés L#303;szló</gco:CharacterString>
</individualName>
<organisationName>
<gco:CharacterString>Eotvos Lorand Geophysical Institute (ELGI)</gco:CharacterString>
</organisationName>
<positionName>
<gco:CharacterString>
geophysicist</gco:CharacterString>
</positionName>
<contactInfo>
<CI_Contact>
<address xlink:href="CI_ADD-sores.xml"/>
</CI_Contact>
</contactInfo>
<role>
<CI_RoleCode codeList="./resources/codeList.xml#CI_RoleCode" codeListValue="custodian"/>
</role>
</CI_ResponsibleParty>
</contact>
<dateStamp>
<gco:Date>2007-01-08</gco:Date>
</dateStamp>
<metadataStandardName>
<gco:CharacterString>ISO 19115</gco:CharacterString>
</metadataStandardName>
<metadataStandardVersion>
<gco:CharacterString>2003</gco:CharacterString>
</metadataStandardVersion>
<dataSetURI>
<gco:CharacterString>http://www.elgi.hu/geomind/getGos?gos-00021</gco:CharacterString>
</dataSetURI>
<referenceSystemInfo>
<MD_ReferenceSystem>
<referenceSystemIdentifier>
<RS_Identifier>
<code>
<gco:CharacterString>EPSG:23700</gco:CharacterString>
</code>
</RS_Identifier>
</referenceSystemIdentifier>
</MD_ReferenceSystem>
</referenceSystemInfo>
<identificationInfo>
<MD_DataIdentification>
<citation>
<CI_Citation>
<title xsi:type="PT_FreeText_PropertyType">
<gco:CharacterString>Dataset of the TDEM measurement campaign in Uveghuta, 2002</gco:CharacterString>
<PT_FreeText>
<textGroup >
<LocalisedCharacterString locale="#xpointer(//*[@id='hu'])">A 2002-ben Ãveghut#303;n végzett tranziens mérési kamp#303;ny adatai</LocalisedCharacterString>
</textGroup>
<textGroup>
<LocalisedCharacterString locale="#xpointer(//*[@id='fi'])">Kelle hulla tejbe pappi, Glassahutta 2002</LocalisedCharacterString>
</textGroup>
</PT_FreeText>
</title>
The XSL file:
Code:
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns="http://www.isotc211.org/2005/gmd"
xmlns:gco="http://www.isotc211.org/2005/gco"
xmlns:gml="http://www.opengis.net/gml"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<xsl:template match="/">
<html>
<body>
<h3>Meta document (ISO-19115)</h3>
<table border="1">
<tr bgcolor="#ff9900">
<th align="left">Title</th>
<th align="left">Alternate title</th>
<th align="left">West</th>
<th align="left">East</th>
<th align="left">South</th>
<th align="left">North</th>
</tr>
<tr>
<td> <xsl:value-of select="/MD_Metadata/identificationInfo/MD_DataIdentification/citation/CI_Citation/title/gco:CharacterString"/></td>
<td> ... </td>
</tr>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
Finally, I make the transformation using batch file (run.bat):
Code:
java -cp "./lib/serializer.jar;./lib/xalan.jar;./lib/xercesImpl.jar;./lib/xml-apis.jar" org.apache.xalan.xslt.Process -IN %1 -OUT %2
To check it, I run the following string in a command line: "run.bat theXML.xml theXMLout.html"
The output, displayed in Firefox 2.0.0.3 browser (same with IE 6.0):
http://www.geocities.com/quakerlt/meta.JPG
Thanks for helping.
P.s. Doug Tidwell just mentioned you, Michael, -- as an author of Saxon -- in his XSLT book. That's nice to hear :)
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May 3rd, 2007, 02:17 AM
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Wrox Author
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Join Date: Jun 2003
Posts: 3,074
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Your document has a default namespace declared, 'xmlns="http://www.isotc211.org/2005/gmd"', so you need so invent a prefix, such as 'default' and declare it in the stylesheet: 'xmlns:default="http://www.isotc211.org/2005/gmd"'.
Then any elements without a prefix in the XML need to be selected via dummy:<element name>.
For more examples take a look at the links I referred to earlier regarding default namespace.
--
Joe ( Microsoft MVP - XML)
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May 3rd, 2007, 02:50 AM
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Authorized User
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Joe,
thanks for the problem solving hint. That made my day.
Again, thanks for the help guys!
Cheers,
Andy
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