ISO/TS 22745-40:2010 is a specialization of ISO/TS 29002-10 that specifies a conceptual information model and an exchange file format for catalogues. A catalogue is a collection of master data records. A master data record is made up of characteristic data expressed as property value pairs, where the property is identified by reference to a concept in an open technical dictionary. The conceptual information model is in Unified Modeling Language (UML). The physical file format is specified via an Extensible Markup Language (XML) schema.