Editorial: the Sisyphus-VT initiative

The Sisyphus-VT endeavor has been useful to the research community. Aside from providing a common problem to calibrate the myriad of research approaches, the endeavor has begun to foster a common language among researchers. It has also fostered a much needed debate about the role of ontologies, what an ontology should contain, and how 'portable' a portable ontology truly is. Moreover, a greater understanding of problem-solving approaches has emerged.