  The construction of a reference ontology for a large domain still remains an
hard human task. The process is sometimes assisted by software tools that
facilitate the information extraction from a textual corpus. Despite of the
great use of XML Schema files on the internet and especially in the B2B domain,
tools that offer a complete semantic analysis of XML schemas are really rare.
In this paper we introduce Janus, a tool for automatically building a reference
knowledge base starting from XML Schema files. Janus also provides different
useful views to simplify B2B application integration.
