Efficient XML Interchange Working Group (EXI WG) is a World Wide Web Consortium (W3C) group established in 2006. The EXI WG conducted a survey of the various situations and applications in which data exchange using XML were desired, and studied a best solution in which XML-based data exchange could be made sufficiently efficient and reasonable under any conditions.
The effort of the group is now available as the W3C Recommendation, Efficient XML Interchange Format 1.0.
Fujitsu has been participating in the EXI WG as a charter member and serving as a co-chair of the group since 2008.[1]