Playing with docbook/roundtrip

Dear all,

  I am trying to play with the docbook/rountrip module. So far here is
what I did:

$ wget http://sourceforge.net/projects/docbook/files/docbook-xsl/1.78.1/docbook-xsl-1.78.1.tar.bz2
$ tar xf docbook-xsl-1.78.1.tar.bz2
$ cd docbook-xsl-1.78.1
$ xmllint --noout --relaxng
http://www.docbook.org/xml/5.0/rng/docbook.rng
./roundtrip/specifications.xml
./roundtrip/specifications.xml:6: element firstname: Relax-NG validity
error : Expecting element personname, got firstname
./roundtrip/specifications.xml:6: element firstname: Relax-NG validity
error : Element author failed to validate content
Relax-NG validity error : Extra element author in interleave
./roundtrip/specifications.xml:5: element author: Relax-NG validity
error : Element info failed to validate content
./roundtrip/specifications.xml:3: element info: Relax-NG validity
error : Element article failed to validate content
./roundtrip/specifications.xml fails to validate


  Does anyone knows if roundtrip module is in working state ?

Thanks,

--
Mathieu