Exchange of geometrical data for E.M. modelling

This paper presents the proposal for a common format for the exchange of geometry and associated data for e.m modelling. The EDX development is a core activity of the EAML team in collaboration with the Working Group on Software of the European Association on Antennas and Propagation (EurAAP). The proposal for a Structures Data Dictionary covers not only geometry but all information necessary to describe a physical structure for electromagnetic modelling. Data concerning modelling algorithms and their settings are excluded to ensure descriptions which are as general as possible and as independent as possible from modelling methodologies. The proposal for the Structures Data Dictionary is discussed together with an EDX example relevant to the Emerald satellite facsimile.