TermBase eXchange (TBX), as specified in ISO 30042, comprises a framework consisting of two interacting components: a core structure and a formalism for defining data category modules. ISO 30042 describes the elements and attributes of the TBX core structure. This document provides an overview of schemas or alternative representations that can be developed based on the information described in ISO 30042. Individual validation schemas or alternative representations are described in individual Technical Reports in the ISO 24633 series. This document does not include details for creating schemas or alternative representations for any particular TBX dialect.