Apologies if you receive this CFP more than once. Please note that the submission deadline has been extended to Sep. 15th! *************************************************************************** The workshop "Methods for Modalities" (M4M) aims to bring together researchers interested in developing algorithms, verification methods and tools based on modal logics. Here the term "modal logics" is conceived broadly, including description logic, guarded fragments, conditional logic, temporal and hybrid logic, etc. To stimulate interaction and transfer of expertise, M4M will feature a number of invited talks by leading scientists, research presentations aimed at highlighting new developments, and submissions of system demonstrations. We strongly encourage young researchers and students to submit papers and posters, especially for experimental and prototypical software tools which are related to modal logics. Invited speakers: François Laroussinie, ENS Cachan and CNRS Martin Lange, Ludwig-Maximilians-Universität Wim Martens, Hasselt University Boris Motik, Universität Karlsruhe Boris Konev, University of Liverpool Uwe Scheffler, Humboldt Universität Regular papers should not exceed the length of 12 pages; short papers are up to six pages of length, and posters and tools can be presented on two pages of text. Proceedings will appear online and as a Humboldt university report. Depending on the submissions, papers may be selected to appear in a special issue of an appropriate journal. Submission is by internet or email. You can (preferrably) upload your PostScript or PDF contribution to the address http://www.easychair.org/M4M-4/submit/ or (alternatively) send it to m4m-4@first.fraunhofer.de. The workshop will take place in Berlin - Adlershof, Germany, which is one of the worlds largest science and technology areas, comprising twelve research institutes, six faculties of the Humboldt University of Berlin, and more than 370 high tech companies. It is hosted by FIRST, the Fraunhofer Institute of Computer Architecture and Software Technology, in collaboration with the computer science institute of Humboldt University. For more information and registration information, see the M4M homepage at http://m4m.loria.fr/ Deadline for submissions: September 15th, 2005 (extended!) Notification: October 17, 2005 Camera ready versions: November 8, 2005 Workshop dates: December 1-2, 2005 The program committee for M4M consists of Holger Schlingloff, Humboldt University / FIRST (local organizations); Carlos Areces, INRIA Lorraine; Patrick Blackburn, INRIA Lorraine; Torben Brauner, Roskilde University; Stephane Demri, ENS de Cachan; Enrico Franconi, Free University of Bolzano; Rajeev Gore, Australian National University; Ian Horrocks, University of Manchester; Joost-Pieter Katoen, RWTH Aachen; Maarten de Rijke, University of Amsterdam; Renate Schmidt, University of Manchester; and Frank Wolter, University of Liverpool.