OPOSSum (Online POrtal for Semantic Services ) is a portal dedicated to collaboratively build a public test collection of semantic web services.
Despite significant research efforts in the field of semantic web services, real tools and applications using them are still rare. One of the main obstacles for improvements in this direction is the lack of sufficiently large and high-quality collections to test and evaluate tools and algorithms for semantic web services. Such collections cannot be built by any single group but only in a collaborative way by the community as a whole. The purpose of OPOSSum is to equip the community with the means to do so. OPOSSum has been designed to make it easy to collect, share and compare semantic service descriptions across various formalisms.