This paper describes how Test-Driven Development (TDD) can be conducted using formal specifications with appropriate tool support. In TDD, the test code is a formal documentation of the required behaviour of the component or system that is being developed, but this documentation is necessarily incomplete and often over-specific. We propose an alternative approach to TDD that is to develop the s...

A tool to support formal reasoning about computer languages and spe-ciic language texts is described. The intention is to provide a tool that can build a formal reasoning system in a mechanical theorem prover from two speciications, one for the syntax of the language and one for the semantics. A parser, pretty-printer and internal representations are generated from the former. Logical represent...

Computer science provides with virtual laboratories, places where one can merge real experiments with the formalism of algorithms and mathematics and where, with the advent of multimedia, sounds and movies can also be added. In this paper we present a method, based on principles of formal ontology, allowing one to develop interactive educational tools. The structure of our system starts from ge...

The language of classical propositional iog-Ic is extended by functorial variables as a new syntactical category. Functorial variables render to be a possible integrating representation of both assertion and presup-position in one and the same logical formula different from such using classical conjunction. O~ Introduction From a computational point of vlew there is an important difficulty of a...

We consider the principle “a new model is a model of an existing one” as the main scheme for deriving new linguistic models by metacomputation. We derive the basic requirements for metacomputation by a structural analysis of different model definitions, and show that in order to automate the creation of linguistic models the following operations on linguistic models have to be performed by meta...

We present a CASE tool based on an object-oriented Petri nets dialect called Cooperative Objects, dedicated to the design of CORBA systems. The notation is used for the formal behavioural specification of objects, and its associated tool puts an emphasis on supporting the design life cycle of CORBA systems. The tool offers enhanced interactivity to present the results derived from the capabilit...

Even with increasing use of formal methods for software development, software testing continues to be a dominant technique for veriication and validation. With speciication-based testing, the precision of formal speciications can make the testing more systematic. This paper describes a tool to assist the derivation of test cases from Object-Z speciications. The tool supports the Test Template F...

This demonstration shows the tool we have developed for hand-sketching user interfaces. Our motivation for developing this tool is to provide an environment where novice programmers can move freely along the design continuum from informal low-fidelity prototypes to completed formal designs. A low-cost digital whiteboard is used to provide a shared work space for Freeform. The tool is integrated...

Formal concept analysis (FCA) is a method that applies to structuring the philosophical notion of human thought into logical concepts. These formal concepts follow a definite mathematical model that can be expressed as lattices. The visualization tool discussed as follows was built as a basic prototype for representing and performing operations on a formal context.

We present a formal tool for verification of multivariate nonlinear inequalities. Our verification method is based on interval arithmetic with Taylor approximations. Our tool is implemented in the HOL Light proof assistant and it is capable to verify multivariate nonlinear polynomial and non-polynomial inequalities on rectangular domains. One of the main features of our work is an efficient imp...