For years now I've relied on cwm from Sean Palmer and TimBL. It's showing its age! I'm currently on FC11 which (as of today) runs Python 2.6. Now, when I run cwm I'm getting the message that the md5sum import is deprecated, I should be using hashlib. OK, I changed all occurrences of that import, and the warning has gone away. Since Sean has declared his loss of interest in semweb, I'm not expecting him to fix it and I guess Tims far too busy. So I started looking for an alternative.

Jena came to mind so I installed it. Nothing obvious in the documentation but some googling found the class jena.rdfcopy which seems to do the trick. The usual classpath hacks and I came up with a script to do either way copying depending on the input file extension. Requires zsh shell, i.e. it's Linux based. That's for the nameonly function. Otherwise OK in bash

Have fun

A response notes: Jena lists possibly useful command line wrappers... but fails to say what each might do? Come on Jena, you can do better than this!

#!/bin/zsh


cp=/apps/jena26/lib/slf4j-api-1.5.6.jar:/apps/jena26/lib/xercesImpl.jar:/apps/jena26/lib/iri.jar:\
/apps/jena26/lib/slf4j-log4j12-1.5.6.jar:/apps/jena26/lib/lucene-core-2.3.1.jar:\
/apps/jena26/lib/log4j-1.2.12.jar:/apps/jena26/lib/icu4j_3_4.jar:/apps/jena26/lib/jena.jar




#Name only, also remove paths. p296
nameonly() {
echo ${${1##*/}%.*}
}

#return the extension, less the name
function extx()
{
  local bn=`basename $1`
  local nm=`nameonly $1`
  local ext=${bn##$nm\.}
  echo "$ext"
}


if [ $# -lt 1 ]
  then
  echo "Usage. $0 inputFileName.n3|rdf"
  echo "\tConverts from n3->rdf or rdf->n3"
  echo "\tdepending on extension of input file."
  exit 2
fi

if [ ! -f $1  ] 
    then
    echo "$0, parameter must be regular file"
    echo "\t$1 is not a regular file"
    exit 2
fi


ext=`extx $1`
name=`nameonly $1`

echo "\t Filename $name, extension $ext"

if [ $ext = "n3" ]
  then
    java -cp $cp jena.rdfcopy ${name}.n3 N3 RDF/XML >${name}.rdf
    echo "See file ${name}.rdf"
    exit 0
fi

if [ $ext = "rdf" ]
  then
    java -cp $cp jena.rdfcopy ${name}.rdf RDF/XML  N3 >${name}.n3
    echo "See file ${name}.n3"
    exit 0
fi

echo "Unable to process $1"
echo "\t Filename $name, extension $ext"

# fyi
# n2 to rdf
#java -cp $cp jena.rdfcopy test.n3 N3 RDF/XML
# rdf to n3
#java -cp $cp jena.rdfcopy test.rdf RDF/XML N3

Fuxi

When I asked, via twitter, where the other command line apps were for Jena, @uche pointed me to FuXi. I baulked a little at the name... but tried to install it anyway.

The Python easy_install (great app) gave me FuXi-1.0-rc.dev-r277.macosx-10.5-i386.tar.gz which said to me it was built for a Mac? I then hunted down FuXi-1.0_rc.dev_r277-py2.5.egg the .egg file, which installed easily... yet gave me

warning FuXi/Rete/Network.py:16: DeprecationWarning: the sets module is deprecated

That warning! I think FuXi was developed under Python 2.5? Still trying to resolve that!Anyway, warning aside, Fuxi does the job too.

Takes a bit of working out, but

$Fuxi --output=pretty-xml --input-format=n3 --closure $1 

I.e. It can do the conversion... just need to RTFM a little. Call up Fuxi (just don't say it out loud, you'll get strange looks!) with no parameters for a full help screen.

Enjoy.