xsl not rendering results - xslt

Question

I have to make an xsl for an xml output exported from a database. The name tags in xml have a prefix bib followed by a colon (as in bib:), and it was defined in xml. But I still got an xsl compiler error saying bib: is not declared. So I added the declaration in xsl. this time the error went away, but the result comes out zero, and I checked the path that is correct. I also tried to exclude "bib:" prefix in xsl after declaration but got the same zero result. I am new to xsl so I don't know what is wrong here. These are my files. Thanks very much.
XML:
<?xml version="1.0" encoding="UTF-8"?>
<embasexmllist>
<cards items="1">
<bib:card items="0" xmlns:bib="http://elsevier.co.uk/namespaces/2001/bibliotek">-
<bib:cardfields>
<bib:Fulltext>
<bib:DOI>10.1371/journal.pone.0068303</bib:DOI>
</bib:Fulltext>
<bib:Title>Mesothelin Virus-Like Particle Immunization Controls Pancreatic Cancer Growth through CD8+ T Cell Induction and Reduction in the Frequency of CD4+foxp3+ICOS- Regulatory T Cells
</bib:Title>
</bib:cardfields>
</bib:card>
</cards>
</embasexmllist>
XSL
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:bib="http://www.bib.com/xml">
<xsl:output indent="yes" omit-xml-declaration="no"
media-type="application/xml" encoding="UTF-8" />
<xsl:template match="/">
<searchresult>
<xsl:apply-templates
select="/embasexmllist/cards/bib:card/bib:cardfields" />
</searchresult>
</xsl:template>
<xsl:template match="bib:cardfields">
<document>
<title><xsl:value-of select="bib:Title" /></title>
<snippet>
<xsl:value-of select="bib:Title" />
</snippet>
<url>
<xsl:variable name="doi" select="bib:Fulltext/bib:DOI"/>
<xsl:value-of
select="concat('http://dx.doi.org/', $doi)" />
</url>
</document>
</xsl:template>
</xsl:stylesheet>

Answer 1

The prefix defines a namespace for the XML elements.
For your stylesheet to work, the namespace declaration needs to match that in your input XML. Replace
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:bib="http://www.bib.com/xml">
with
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:bib="http://elsevier.co.uk/namespaces/2001/bibliotek">
This results in the following output XML:
<?xml version="1.0" encoding="utf-8"?>
<searchresult xmlns:bib="http://elsevier.co.uk/namespaces/2001/bibliotek">
<document>
<title>
Mesothelin Virus-Like Particle Immunization Controls Pancreatic Cancer Growth through CD8+ T Cell Induction and Reduction in the Frequency of CD4+foxp3+ICOS- Regulatory T Cells
</title>
<snippet>
Mesothelin Virus-Like Particle Immunization Controls Pancreatic Cancer Growth through CD8+ T Cell Induction and Reduction in the Frequency of CD4+foxp3+ICOS- Regulatory T Cells
</snippet>
<url>http://dx.doi.org/10.1371/journal.pone.0068303</url>
</document>
</searchresult>