xprocdoc not working with Calabash

[vojtechtoman]

I was trying to run my xprocdoc pipeline (http://github.com/vojtechtoman/xprocdoc) with Calabash and I ran into a number of issues.

The pipeline works with Calumet and is supposed to be processor-independent, but I failed to make it work with Calabash.

1. Suppose you have this pipeline (pipeline.xpl):

   <p:pipeline xmlns:p="http://www.w3.org/ns/xproc" version="1.0">
     <p:documentation xmlns="http://www.w3.org/1999/xhtml">
       <p>Documentation</p>
     </p:documentation>
     <p:identity/>
   </p:pipeline>
   

   then calling:

   calabash -i source=pipeline.xpl xprocdoc.xpl
   

   will fail with:

   Feb 19, 2013 12:28:37 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: file:///home/vojtech/Dev/xprocdoc/a.xpl:err:XTSE0150:The supplied file does not appear to be a stylesheet
   Feb 19, 2013 12:28:37 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: file:///home/vojtech/Dev/xprocdoc/a.xpl:err:XTSE0150:The supplied file does not appear to be a stylesheet
   Feb 19, 2013 12:28:37 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: Failed to compile stylesheet. 1 error detected.
   Feb 19, 2013 12:28:37 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: Failed to compile stylesheet. 1 error detected.
   Feb 19, 2013 12:28:37 PM com.xmlcalabash.drivers.Main error
   SEVERE: Pipeline failed: net.sf.saxon.s9api.SaxonApiException: Failed to compile stylesheet. 1 error detected.
   Feb 19, 2013 12:28:37 PM com.xmlcalabash.drivers.Main error
   SEVERE: Underlying exception: javax.xml.transform.TransformerConfigurationException: Failed to compile stylesheet. 1 error detected.
   

   It turns out that somehow this does not work in Calabash:

   <p:declare-step type="xd:summary-to-xhtml" name="summary-to-xhtml">
     <p:input port="source" primary="true"/>
     <p:input port="stylesheet">
       <p:document href="xd2html.xsl"/>
     </p:input>
     <p:input port="parameters" kind="parameter"/>
     <p:output port="result" sequence="true"/>
   
     <p:xslt version="2.0" name="xslt">
       <p:input port="stylesheet">
         <p:pipe step="summary-to-xhtml" port="stylesheet"/>
       </p:input>
     </p:xslt>
     ...
   

   Once I replace the p:pipe in p:xslt with <p:document href="xd2html.xsl"/>, the p:xslt step does not complain anymore.

2. After applying the above mentioned workaround, the pipeline still does not run:

   Feb 19, 2013 12:49:14 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: err:XD0001:XD0001
   Feb 19, 2013 12:49:14 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: err:XD0001:XD0001
   Feb 19, 2013 12:49:14 PM com.xmlcalabash.drivers.Main error
   SEVERE: It is a dynamic error if a non-XML resource is produced on a step output or arrives on a step input.
   

   At this point I gave up :)

3. Also note that if you do

   calabash -i source=xprocdoc.xpl xprocdoc.xpl
   

   Calabash fails with:

   Feb 19, 2013 12:50:36 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: net.sf.saxon.s9api.SaxonApiException: Cannot create a namespace node (xd) whose parent is a document node
   Feb 19, 2013 12:50:36 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: net.sf.saxon.s9api.SaxonApiException: Cannot create a namespace node (xd) whose parent is a document node
   Feb 19, 2013 12:50:36 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: net.sf.saxon.s9api.SaxonApiException: Cannot create a namespace node (xd) whose parent is a document node
   Feb 19, 2013 12:50:36 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: net.sf.saxon.s9api.SaxonApiException: Cannot create a namespace node (xd) whose parent is a document node
   Feb 19, 2013 12:50:36 PM com.xmlcalabash.util.DefaultXProcMessageListener error
   SEVERE: net.sf.saxon.s9api.SaxonApiException: Cannot create a namespace node (xd) whose parent is a document node
   Feb 19, 2013 12:50:36 PM com.xmlcalabash.drivers.Main error
   SEVERE: com.xmlcalabash.core.XProcException: net.sf.saxon.s9api.SaxonApiException: Cannot create a namespace node (xd) whose parent is a document node
   Feb 19, 2013 12:50:36 PM com.xmlcalabash.drivers.Main error
   SEVERE: Underlying exception: net.sf.saxon.s9api.SaxonApiException: Cannot create a namespace node (xd) whose parent is a document node
   

[fgeorges]

Exactly the same as me :-) For 3., this is because the variables $namespace-uri. The value of both of them is a namespace node. Explicitly taking their string value solve the error, but that is a bug IMHO (changing namespace::*[...] into namespace::*[...]/string(.) solves the problem).

[ndw]

After fixing the namespace bug, the problem remains.

It appears that XML Calabash always connects input ports to the default readable port, whether they are primary nor not. Re-reading the spec, I think that's wrong. :-)

[ndw]

Ok, after I (think) I've fixed that, I get:

SEVERE: file:/Volumes/Data/github/xprocdoc/xd2html.xsl:56:err:FORG0002:Base URI {} is not an absolute URI
SEVERE: Base URI {} is not an absolute URI
SEVERE: Base URI {} is not an absolute URI
SEVERE: Pipeline failed: net.sf.saxon.s9api.SaxonApiException: Base URI {} is not an absolute URI
SEVERE: Underlying exception: net.sf.saxon.trans.XPathException: Base URI {} is not an absolute URI
net.sf.saxon.s9api.SaxonApiException: Base URI {} is not an absolute URI
at net.sf.saxon.s9api.XsltTransformer.transform(XsltTransformer.java:433)
at com.xmlcalabash.library.XSLT.run(XSLT.java:230)
at com.xmlcalabash.runtime.XAtomicStep.run(XAtomicStep.java:381)

Which looks like a pipeline bug to me. Where/how is the $output-base-uri parameter set?

[vojtechtoman]

The xd2html.xsl stylesheet recognizes 4 parameters: output-base-uri, input-base-uri, product, and overview-file (see the project README for more details). All of them are optional, but I have clearly never tested the pipeline without specifying output-base-uri. Should be fixed now. Can you give it another try?

The parametere were passed to the stylesheet as normal XProc parameters (so you had to pass them via xd:xprocdoc's parameter input port). I decided to make them XProc options to make their existence more explicit.

I have also put some xprocdoc-style documentation in the pipeline. So you can now use the pipeline to generate its own XHTML documentation :)

(Note that I have also changed the namespace uri of the xd:xprocdoc to something more meaningful.)

[ndw]

Yep. That works. Thanks, Vojtech!