RE: [xsl] Saxon and XML Catalogs

[David.Pawson@xxxxxxxxxxx]

> We are trying to use XML Catalogs with Saxon Apache . 

I'm guessing you mean Saxon? Its not part of Apache.

 Saxon is 
> initially resolving the catalog file, when it loads the XML
> file it doesn't resolve the DTD.  It keeps looking in the source
> directory for the DTD.

Without a steer, saxon looks in the same directory as the
stylesheet I think. Hence the need for the base command.
If you make it absolute it works more easily

<group xml:base="file://c:/sgml/files/">




> 
> We have tried public identifiers, system identifiers and URIs
> in the XML file and get the same results.

If you want to avoid increasing versions in the dtd names,
try

<catalog prefer="public"
	 xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">

which makes the resolver hit on the fpi before the SYSTEM bit.


> java -classpath "%CLASSPATH%" com.icl.saxon.StyleSheet -w0 -x 
> org.apache.xml.resolver.tools.ResolvingXMLReader -y 
> org.apache.xml.resolver.tools.ResolvingXMLReader -r 
> org.apache.xml.resolver.tools.CatalogResolver  raven.xml 
> lib/poem.xsl  

Sounds about right. I use

java  -cp
.;\sgml;\myjava\saxon652.jar;\myjava\xerces.jar;\myjava\cat\resolver.jar;\sg
ml\nw\docbook\website-2.2\extensions\saxon64.jar
-Djavax.xml.parsers.DocumentBuilderFactory=org.apache.xerces.jaxp.DocumentBu
ilderFactoryImpl
-Djavax.xml.parsers.SAXParserFactory=org.apache.xerces.jaxp.SAXParserFactory
Impl
-Djavax.xml.transform.TransformerFactory=com.icl.saxon.TransformerFactoryImp
l  com.icl.saxon.StyleSheet   -o %3  -x
com.sun.resolver.tools.ResolvingXMLReader -y
com.sun.resolver.tools.ResolvingXMLReader -r
com.sun.resolver.tools.CatalogResolver -w1 %1  %2 "saxon.extensions=1"  %4
%5 %6

just to make sure I get a decent parser too.

> 
> <-- Catalog File -->
>  
> <?xml version="1.0"?>
> <!DOCTYPE catalog
>    PUBLIC "-//OASIS/DTD Entity Resolution XML Catalog V1.0//EN"
>    
> "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd";>

Once you are familiar with the catalog format,
I'd dump the document type declaration. Only slows things down.


> 
> <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
Your choice, but I'd add the prefer="public"



> 
>   <group  xml:base="'/TestCatalog/" >
Why double quoted?
<group xml:base="file://c:/sgml/files/">
works for me. Try the missing file://


> 
>       <public publicID="-//Test//DTD //EN" 
> uri="file:///c:/TestCatalog/DTD/poem.dtd"/>

> <rewriteURI
>         uriStartString="foo.dtd"
>         rewritePrefix="DTD/poem.dtd" />

Mmm. I've never used/needed the rewrite. Can't help you there.
I do use
<uri name="http://www.loc.gov/nls/z3986/v100/ncx110.dtd";
   uri="/sgml/niso/ncx110.dtd"/>

To map from a web based to a local dtd.


Snip


> Parse catalog: file:/TestCatalog/catalog/poem.soc
> Loading catalog: file:/TestCatalog/catalog/poem.soc
> Default BASE: file:/TestCatalog/catalog/poem.soc
> xml:base: '/TestCatalog/
> BASE STR: '/TestCatalog/
> Error: required attribute publicId missing.
> rewriteURI: foo.dtd
> 	DTD/poem.dtd
> REWRITE_URI: foo.dtd

something wrong here. Try the form above.
<rewriteSystem systemIdStartString="http://www.oasis-open.org/";
          rewritePrefix="file:///share/doctypes/oasis/"/>
is the definition.


> 	file:/TestCatalog/catalog/'/TestCatalog/DTD/poem.dtd (reset)
> xml:base: file:/TestCatalog/catalog/poem.soc BASE STR:
> file:/TestCatalog/catalog/poem.soc
> resolveSystem(file:/C:/TestCatalog/lib/poem.xsl)

Looks like the xml:base is working nicely.

Failing on the re-write?

Probably teaching grandma about eggs and all that...

http://wwws.sun.com/software/xml/developers/resolver/article/#d0e719

The bible:
http://www.oasis-open.org/committees/download.php/130/cs-entity-xml-catalogs
-1.0.html#s.rewritesystem

Note the broken uri.

HTH DaveP.


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