Invited Technical Paper -- Behavior-Preserving Refinement Relations Between Dynamic Software Architectures -- Contributed Papers -- Modelling Mobility with Petri Hypernets -- Cryptomorphisms at Work -- Towards a Formal Specification of an Electronic Payment System in CSP-CASL -- Algebraic Semantics of Design Abstractions for Context-Awareness -- CCC – The Casl Consistency Checker -- Ontologies for the Semantic Web in Casl -- Theoroidal Maps as Algebraic Simulations -- Behavioural Semantics of Algebraic Specifications in Arbitrary Logical Systems -- A Simple Refinement Language for Casl -- A Distributed and Mobile Component System Based on the Ambient Calculus -- Application and Formal Specification of Sorted Term-Position Algebras -- From Conditional to Unconditional Rewriting -- Type Class Polymorphism in an Institutional Framework -- Architectural Specifications for Reactive Systems.