Chameleon: an Extensible and Customizable Tool for Web Data Translation Riccardo Torlone and Paolo Atzeni   View Paper (PDF)   Return to Distributed Information Management (Session D2) Abstract Chameleon is a tool for the management of Web data according to different formats and models and for the automatic transformation of schemas and instances from one model to another. It handles semistructured data, schema lan- guages for XML, and traditional database models. The system is based on a "meta- model" approach, in the sense that it knows a set of metaconstructs, and allows the def- inition of models by means of the involved metaconstructs. The system also has a library of basic translations, referring to the known metaconstructs, and builds actual translations by means of suitable combinations of the basic ones. The main functions offered to the user are: (i) definition of a model; (ii) definition and validation of a schema with respect to a given model; (iii) schema translation (from a model to another). ©2004 Association for Computing Machinery