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.