Namespace prefix xmlns has not been declared

[metalhammer]

Hi, it's my first serious attempt at XSLT, sow probably a noob question.

I am trying to make a template match with an attribute in it. The attribute has a xmlns namespace. Oxygen says I have to declare the xmlns namespace, but I thought that the xmlns namespace didn't had to be declared. (I wouldn't now how either)

This is a shortened version of the xml file

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<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>

<?xml-stylesheet type="text/xsl" href="XMP_omvormen.xslt"?>

<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 4.2.2-c063 53.352624, 2008/07/30-18:05:41        ">

   <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">

      <rdf:Description rdf:about=""

            xmlns:egGr="http://ns.esko-graphics.com/grinfo/1.0/"

            xmlns:egInk="http://ns.esko-graphics.com/inkinfo/1.0/">

         <egGr:nrpages>4</egGr:nrpages>

         <egGr:startlogpage>1</egGr:startlogpage>

         <egGr:units>mm</egGr:units>

         <egGr:vsize>126.9380112</egGr:vsize>

         <egGr:hsize>210.</egGr:hsize>

         <egGr:margtop>14.</egGr:margtop>

         <egGr:margbot>14.0000076</egGr:margbot>

         <egGr:margleft>14.00000381</egGr:margleft>

         <egGr:margright>14.</egGr:margright>

         <egGr:vshrink>1.</egGr:vshrink>

         <egGr:hshrink>.996</egGr:hshrink>

         <egGr:readerspread>False</egGr:readerspread>

         <egGr:colorprofloc>EGDatabase</egGr:colorprofloc>

         <egGr:colorprofname>crom_offs</egGr:colorprofname>

         <egGr:colorprofdesc>crom_offs</egGr:colorprofdesc>

         <egGr:trapped>True</egGr:trapped>

         <egGr:screenreg>False</egGr:screenreg>

         <egGr:inks>

            <rdf:Seq>

               <rdf:li rdf:parseType="Resource">

                  <egInk:name>5405</egInk:name>

                  <egInk:type>pantone</egInk:type>

                  <egInk:frequency>150.</egInk:frequency>

                  <egInk:angle>22.5</egInk:angle>

                  <egInk:dotshape>R</egInk:dotshape>

                  <egInk:r>.3218039274</egInk:r>

                  <egInk:g>.4258823395</egInk:g>

                  <egInk:b>.4894117713</egInk:b>

                  <egInk:attribute>normal</egInk:attribute>

               </rdf:li>

               <rdf:li rdf:parseType="Resource">

                  <egInk:name>583</egInk:name>

                  <egInk:type>pantone</egInk:type>

                  <egInk:frequency>150.</egInk:frequency>

                  <egInk:angle>82.5</egInk:angle>

                  <egInk:dotshape>R</egInk:dotshape>

                  <egInk:r>.6988235116</egInk:r>

                  <egInk:g>.7109804153</egInk:g>

                  <egInk:b>0.</egInk:b>

                  <egInk:attribute>normal</egInk:attribute>

               </rdf:li>

            </rdf:Seq>

         </egGr:inks>

      </rdf:Description>

      <rdf:Description rdf:about=""

            xmlns:egPDFNat="http://ns.esko-graphics.com/pdfnatversion/1.0/">

         <egPDFNat:flexripversion>undetermined</egPDFNat:flexripversion>

         <egPDFNat:version>201</egPDFNat:version>

      </rdf:Description>

      <rdf:Description rdf:about=""

            xmlns:xmp="http://ns.adobe.com/xap/1.0/">

         <xmp:CreateDate>2007-07-04T16:36:14+02:00</xmp:CreateDate>

         <xmp:CreatorTool>Esko PackEdge 7.0 NT Jun 26 2007, build 627</xmp:CreatorTool>

         <xmp:MetadataDate>2007-07-04T16:36:16+02:00</xmp:MetadataDate>

         <xmp:ModifyDate>2007-07-04T16:36:16+02:00</xmp:ModifyDate>

         <xmp:Rating>4</xmp:Rating>

      </rdf:Description>

   </rdf:RDF>

</x:xmpmeta>

<?xpacket end="w"?>

And this is my XSLT file for now

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<?xml version="1.0" encoding="ISO-8859-1"?>

<!-- DWXMLSource="sample_file_esko.xml" -->

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:egink="http://ns.esko-graphics.com/inkinfo/1.0/" xmlns:photoshop="http://ns.adobe.com/photoshop/1.0/" xmlns:egbarc="http://ns.esko-graphics.com/barcode/1.0/" xmlns:x="adobe:ns:meta/" xmlns:egextfl2="http://ns.esko-graphics.com/extfileslist/2.0/" xmlns:egcadreg="http://ns.esko-graphics.com/cadreg/1.0/" xmlns:egextfl="http://ns.esko-graphics.com/extfileslist/1.0/" xmlns:eginkcovl="http://ns.esko-graphics.com/inkcovlist/1.0/" xmlns:xmpmm="http://ns.adobe.com/xap/1.0/mm/" xmlns:xmp="http://ns.adobe.com/xap/1.0/" xmlns:egpdfnat="http://ns.esko-graphics.com/pdfnatversion/1.0/" xmlns:egextf="http://ns.esko-graphics.com/extfile/1.0/" xmlns:egcadl="http://ns.esko-graphics.com/cadlist/1.0/" xmlns:xmprights="http://ns.adobe.com/xap/1.0/rights/" xmlns:egpagl="http://ns.esko-graphics.com/pagerangelist/1.0/" xmlns:egbarcl="http://ns.esko-graphics.com/barcodelist/1.0/" xmlns:eggr="http://ns.esko-graphics.com/grinfo/1.0/" xmlns:xmpbj="http://ns.adobe.com/xap/1.0/bj/" xmlns:egfontl="http://ns.esko-graphics.com/fontlist/1.0/" xmlns:stref="http://ns.adobe.com/xap/1.0/sType/ResourceRef#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:egfont="http://ns.esko-graphics.com/fontinfo/1.0/" xmlns:egpag="http://ns.esko-graphics.com/pagerange/1.1/" xmlns:dc="http://purl.org/dc/elements/1.1/">

	<xsl:template match="/">

		<html>

			<head>

				<title>Dit is de visuele weergave van een XMP bestand</title>

			</head>

			<body>

				<h2>Dit is de visuele weergave van een XMP bestand</h2>

				<xsl:apply-templates/>

			</body>

		</html>

	</xsl:template>

	<xsl:template match="/x:xmpdata/rdf:RDF/rdf:Description[@xmlns:eGR]">

		<h3>Beschrijving</h3>

	</xsl:template>

</xsl:stylesheet>

I got an error on this line:

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<xsl:template match="/x:xmpdata/rdf:RDF/rdf:Description[@xmlns:eGR]">

[Radu]

Hi,

Declarations like xmlns:egGr="http://ns.esko-graphics.com/grinfo/1.0/" which can appear on an element are namespace mappings. After such a declaration if you use the mapped prefix for an element the element will be in the mapped namespace.
So <egGr:nrpages> means the element nrpages is in the namespace http://ns.esko-graphics.com/grinfo/1.0/.

We do not know exactly what you are trying to accomplish.
The match="/x:xmpdata/rdf:RDF/rdf:Description[@xmlns:egGR]" you are using would mean that you want to match every rdf:Description which contains the egGr attribute with the namespace specified by the mapping of the prefix xmlns. xmlns is a reserved XML keyword and cannot be used as a prefix name.
If you are trying to find the element which contains a certain prefix mapping like: xmlns:egGr="http://ns.esko-graphics.com/grinfo/1.0/" defined on it then this again cannot be accomplished as prefix mappings are special attributes which cannot be matched by XPath expressions.

Maybe you can give us more details about what you are trying to match with the template from the XML file and if you want to match an element or an attribute.

You can also find a good XSLT tutorial here:
http://www.zvon.org/xxl/XSLTutorial/Boo ... tents.html

[metalhammer]

I want to match a <rdf:Description> element with the xmlns:egGr="http://ns.esko-graphics.com/grinfo/1.0/" attribute.

This way I think I can make a template for everything in the

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      <rdf:Description rdf:about=""

            xmlns:egGr="http://ns.esko-graphics.com/grinfo/1.0/"

            xmlns:egInk="http://ns.esko-graphics.com/inkinfo/1.0/">

element

[Radu]

Hi,

xmlns:egGr="http://ns.esko-graphics.com/grinfo/1.0/" is a special namespace mapping attribute which cannot be matched by any XPath expression (the XSLT processor uses it only to map prefixes to namespaces and does not even recognize it as an attribute).
You can use match="/x:xmpdata/rdf:RDF/rdf:Description to match all Description elements in the http://www.w3.org/1999/02/22-rdf-syntax-ns# namespace.

Regards,
Radu

[metalhammer]

Hi,

My XSLT has to work on different XML files. Some of these files have the

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          <rdf:Description rdf:about=""

                xmlns:egGr="http://ns.esko-graphics.com/grinfo/1.0/"

                xmlns:egInk="http://ns.esko-graphics.com/inkinfo/1.0/">

element in it, others have not. They have a rdf:Description elements with other namespaces as attributes.

Is there a way to check in XSLT if the

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          <rdf:Description rdf:about=""

                xmlns:egGr="http://ns.esko-graphics.com/grinfo/1.0/"

                xmlns:egInk="http://ns.esko-graphics.com/inkinfo/1.0/">

is present in the XML file without having to check every child element of it?

[george]

Hi,

You can use the namespace axis to check that a namespace is declared, for example:

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<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"

    version="1.0">

    <xsl:template match="rdf:Description[

            namespace::*[.='http://ns.esko-graphics.com/grinfo/1.0/'] and 

            namespace::*[.='http://ns.esko-graphics.com/inkinfo/1.0/']

        ]"> 

        Got it! 

    </xsl:template>

</xsl:stylesheet>

Or, if you want to check also the prefixes:

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<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"

    version="1.0">

    <xsl:template match="rdf:Description[

            namespace::*[.='http://ns.esko-graphics.com/grinfo/1.0/' and name()='egGr'] and 

            namespace::*[.='http://ns.esko-graphics.com/inkinfo/1.0/' and name()='egInk']

        ]"> 

        Got it! 

    </xsl:template>

</xsl:stylesheet>

Best Regards,
George

[metalhammer]

Hi,

thanks, that was what I was searching for.
Is there a way to make it work in firefox to?

[george]

If this does not work in Firefox then it may be an issue that they have with the namespace axis. I suggest to try searching or asking on a Firefox related forum to see if this is a known issue and if there is a workaround to access namespaces in Firefox.

Best Regards,
George

[metalhammer]

I think I'll stick with safari.

Thanks a lot for all your help!