Abstract: A method and system For Semantically Unifying Data from multiple disparate sources into a common semantic framework. The method and system For Semantically Unifying Data generally includes a data unification system containing a computer, server, network connection, stored data files, and software logic to allow a user to edit and manage key data integration and data quality information; a semantic framework containing a domain's concepts and data definitions; rule dictionaries containing business and technical rules; data dictionaries containing data models and specifications; an object metadata schema containing semantic metadata; and, ontology templates defining object classes for machine readable data concepts.