I have been working at "IBM":http://www.ibm.com for the past couple years on a project called the "IBM Semantic Layered Research Platform":http://ibm-slrp.sourceforge.net . The project is a collection of software components that provide support for semantics through the entire application-middleware stack. We released the "source code":http://sourceforge.net/project/showfiles.php?group_id=181986 for the entire project in November under the "Eclipse Public License":http://www.eclipse.org/legal/epl-v10.html . My part of the project originates from my work on the "LSID":http://lsid.sourceforge.net project. I had been working with a lot of "RDF":http://www.w3.org/RDF/ metadata while maintaining the "Perl LSID development stack":http://sourceforge.net/project/showfiles.php?group_id=130827&package_id=144608 and realized that (back in early 2004) that a clean, useful and relatively bug free RDF framework didn't exist. It turns out that a number of people shared my concerns and were independently creating their own ad hoc Perl libaries for RDF processing. I started to collect my various RDF manipulating Perl scripts from my "LSID":http://lsid.sourceforge.net work and began to organize them in to a framework that I called "ODO":http://sourceforge.net/project/showfiles.php?group_id=181986&package_id=215049 . ODO is an acronym for "Ontologies, Databases, and Optimizations," which are the three items I was most interested in experimenting with at the time. They were also the three categories of functionality I couldn't find in the existing Perl RDF libraries. "ODO":http://sourceforge.net/project/showfiles.php?group_id=181986&package_id=215049 is still evolving and I have some more features to push out but right now it supports: * Nodes, statements and graph backed by memory * RDFS and OWL-Lite to Perl code generators * Queries using RDQL with "SPARQL":http://www.w3.org/TR/rdf-sparql-query/ on its way * RDF/XML and NTriple parsers Each of these items is built inside the ODO framework so it is possible to extend and enhance the library over time without breaking applications (hopefully!). I have some more components of the library to push out over the next few weeks. I am in the process of making the POD available on the "IBM Semantic Layered Research Platform":http://ibm-slrp.sourceforge.net web site and will write some demo applications soon!