“…In the last few years, a huge number of methodologies and tools to create, manage, represent, and match ontologies have been proposed and implemented in several contexts, often for ad hoc purposes (e.g., to map well-known knowledge bases or represent specific knowledge domains); a complete discussion of these is outside the scope of our work, but useful books, surveys and ad hoc models are available in the literature (e.g., Cristani & Cuel, 2005;Euzenat & Shvaiko, 2007;Denny, 2004;van Assem, Gangemi, & Schreiber, 2006;Huang & Zhou, 2007). After analyzing these resources, we argue that the main novelties of our model are that its independence from the particular domain of interest; that our linguistic approach provides a simple and general way to represent knowledge; that the strong formalization of our model is useful to integrate (directly or using ad hoc match strategies) general knowledge bases; that the implementation of our model in a software tool using a 3D interface provides an easy way to create and manipulate ontologies; and that the use of a standard language to represent our ontologies facilitates sharing and reusing knowledge.…”