for an exchange format by numerous research groups working in the domain of software reengineering and graph transformation. During the APPLIGRAPH Subgroup Meeting on Exchange Formats for Graph Transformation, an overview of GXL was given [Schürr, 2000] and participants decided to use GXL to represent graphs within their exchange format for graph transformation systems (GTXL). The 2000 IBM Centers for Advanced Studies Conference (CASCON 2000) included two half-day workshops on GXL. In the morning, 'Software Data Interchange with GXL: Introduction and Tutorial' gave a primer on the syntax and concepts in the format, while the afternoon workshop, 'Software Data Interchange with GXL: Implementation Issues' discussed the development of converters and standard schemas. At the Seventh Working Conference on Reverse Engineering (WCRE 2000), GXL was presented in a tutorial [Holt et al., 2000] and during the workshop on exchange formats [Holt/Winter, 2000]. Central results were a simpler representation of ordering information, the usage of UML class diagrams to present graph schemata and the representation of UML class diagrams by GXL graphs. The Dagstuhl Seminar on Interoperability of Reengineering Tools ratified GXL 1.0 as a standard interchange format for exchanging reengineering related data. Numerous groups from industry and research committed to using GXL, to import and export GXL documents to their tools, and to write various GXL tools. GXL Partners During various conferences and workshops the following groups from industry and academics committed to refining GXL to be the standard graph exchange format, write GXL filters and tools or use GXL as exchange format in their tools: Bell Canada (Datrix Group) Centrum Wiskunde & Informatica (CWI), The Netherlands (Interactive Software Development and Renovation and Information Visualization) IBM Centre for Advanced Studies, Canada Mahindra British Telecom, India Merlin Software-Engineering GmbH, Germany Nokia Research Center, Finland (Software Technology Laboratory) Philips Research, The Netherlands (Software Architecture Group) RWTH Aachen, Germany (Department of Computer Science III) TU Berlin, Germany (Theoretical CS/Formal Specification Group) University of Berne, Switzerland (Software Composition Group) University of Bremen, Germany (Software Engineering Group) Bundeswehr University Munich, Germany (Institute for Software Technology) University of Edinburgh, UK, (Edinburgh Concurrency Workbench) University of Koblenz, Germany (GUPRO Group) University of Oregon, USA (Department of Computer Science) University of Paderborn, Germany (AG Softwaretechnik) University of Stuttgart, Germany (BAUHAUS Group) University of Szeged, Hungary (Research Group on Artificial Intelligence) University of Toronto, Canada (Software Architecture Group) University of Victoria, Canada (RIGI Group) University of Waterloo, Canada (Software Architecture