Recent Trends in Algebraic Development Techniques

This volume contains selected papers from WADT 2008, the 19th International WorkshoponAlgebraicDevelopmentTechniques. Afterhavingjoinedforceswith CMCS for CALCO 2007 in Bergen, WADT took place in 2008 as an individual workshop and in its traditional format. Like its predecessors, WADT 2008 focussed on the algebraic approach to the speci?cation and development of systems, which encompasses many aspects of formal design. Originally born around formal methods for reasoning about abstract data types, WADT now covers new speci?cation frameworks and p- gramming paradigms (such as object-oriented, aspect-oriented, agent-oriented, logic and higher-order functional programming) as well as a wide range of - plication areas (including information systems, concurrent, distributed and - bile systems). The main topics are: foundations of algebraic speci?cation and other approaches to formal speci?cation, including process calculi and models of concurrent, distributed and mobile computing; speci?cation languages, methods and environments; semantics of conceptual modelling methods and techniques; model-drivendevelopment;graphtransformations,termrewritingandproofs- tems; integration of formal speci?cation techniques; formal testing and quality assurance; and validation and veri?cation. The Steering Committee of WADT consists of Michel Bidoit, Jos´ e Fiadeiro, Hans-J¨ orgKreowski,TillMossakowski,PeterMosses,FernandoOrejas,Francesco Parisi-Presicce,and Andrzej Tarlecki. WADT 2008 took place during June 13-16, 2008, at Hotel Santa Croce in Fossabanda, a former monastery in the center of Pisa, and was organized by a committee chaired by Andrea Corradini and including Filippo Bonchi, Roberto Bruni, Vincenzo Ciancia and Fabio Gadducci. The scienti?c program consisted of33presentationsselectedonthebasisofsubmittedabstracts,aswellasinvited talks by Egon B¨ orger, Luca Cardelli and Stephen Gilmore. The workshoptook place under the auspices of IFIP WG 1.