XTG Data Modeller is a visual CASE tool for data structure modelling. Main features: Modelling using a GUI, attribute repository, reengineering via ODBC or from SQL schema. Generation of TXT reports, SQL scripts (DDL), DML/DQL commands, HTML documentation of the model with hypertext cross-references between entities. Multidimensional modelling. IDEF1X methodology. Referential integrity, modelling of both the logical and physical level, indexes, definition of roles of attributes...