Concepts of behavioral subtyping and a sketch of their extension to component-based systems
Foundations of component-based systems
A formal model for componentware
Foundations of component-based systems
An implementation-oriented semantics for module composition
Foundations of component-based systems
Behavioral Specifications of Businesses and Systems
Behavioral Specifications of Businesses and Systems
Abstract State Machines: A Method for High-Level System Design and Analysis
Abstract State Machines: A Method for High-Level System Design and Analysis
Glass-Box and Black-Box Views on Object-Oriented Specifications
SEFM '04 Proceedings of the Software Engineering and Formal Methods, Second International Conference
KeY: a formal method for object-oriented systems
FMOODS'07 Proceedings of the 9th IFIP WG 6.1 international conference on Formal methods for open object-based distributed systems
Modular specification of encapsulated object-oriented components
FMCO'05 Proceedings of the 4th international conference on Formal Methods for Components and Objects
The spec# programming system: an overview
CASSIS'04 Proceedings of the 2004 international conference on Construction and Analysis of Safe, Secure, and Interoperable Smart Devices
Validity invariants and effects
ECOOP'07 Proceedings of the 21st European conference on Object-Oriented Programming
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We propose a semantic foundation for the contract-based design of software components. Our approach focuses on the characteristic principles of component-oriented development, like provided and required interface specifications and strong encapsulation. Semantically, we adopt classical concepts of mathematical logic using models, in our framework given by labelled transition systems with "states as algebras", sentences, and a satisfaction relation which characterizes those properties of a component which are observable by the user in the "strongly reachable" states. We distinguish between models of interfaces and models of component bodies. The latter are equipped with semantic encapsulation constraints which guarantee, that if the component body is a correct user of the required interface operations, then it can safely rely on all properties of the required interface specification. Our model-theoretic semantics of interfaces and component bodies suggests two semantic views on a component, its external and its internal semantics which must be properly related to ensure the correctness of a component. We also study a refinement relation between required and provided interface specifications of different components used for component composition.