INSTITUTE OF COMPUTER SCIENCE FOUNDATION FOR RESEARCH AND TECHNOLOGY - HELLAS

The Semantic Index System (SIS) is a tool for describing and documenting large evolving varieties of highly interrelated data, concepts and complex relationships, as opposed to large homogeneous populations in fixed formats (handled by traditional DBMS). As such, it is suited for the representation of scientific knowledge and engineering designs or constructs. These kinds of data are also characterized by relative stability, i.e. they undergo few updates by comparison to, say, administrative, financial or observational data, which give rise to continuously changing sets of uniform items.