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Gonzalez A.,DSIC | Gonzalez A.,Polytechnic University of Valencia | Espana S.,Research Center ProS | Espana S.,Polytechnic University of Valencia | And 4 more authors.
Lecture Notes in Business Information Processing

Enterprise information systems can be developed following a model-driven paradigm. This way, models that represent the organisational work practice are used to produce models that represent the information system. Current software development methods are starting to provide guidelines for the construction of conceptual models, taking as input requirements models. This paper proposes the integration of two methods: Communication Analysis (a communication-oriented requirements engineering method [1]) and the OO Method (a model-driven object-oriented software development method [2]). For this purpose, a systematic technique for deriving class diagrams from business process models is proposed. The business process specifications (which include message structures) are processed in order to obtain class diagram views, which are integrated to create the class diagram incrementally. Then, using the olivanova framework, software source code can be generated automatically. The paper also discusses the advantages and current limitations of the technique. Results show that, although there is room for improvement, the technique is feasible and it does facilitate the creation of the class diagram. © 2011 Springer-Verlag. Source

Alpuente M.,DSIC | Escobar S.,DSIC | Gramlich B.,Vienna University of Technology | Lucas S.,DSIC
Theoretical Computer Science

In functional languages such as OBJ*, CafeOBJ, and Maude, symbols are given strategy annotations that specify (the order in) which subterms are evaluated. Syntactically, strategy annotations are given either as lists of natural numbers or as lists of integers associated to function symbols whose (absolute) values refer to the arguments of the corresponding symbol. A positive index prescribes the evaluation of an argument whereas a negative index means "evaluation on-demand". These on-demand indices have been proposed to support laziness in OBJ-like languages. While strategy annotations containing only natural numbers have been implemented and investigated to some extent (regarding, for example, termination, confluence, and completeness), fully general annotations (including positive and negative indices) have been disappointingly under-explored to date. In this paper, we first point out a number of problems of current proposals for handling on-demand strategy annotations. Then, we propose a solution to these problems by keeping an accurate track of annotations along the evaluation sequences. We formalize this solution as a suitable extension of the evaluation strategy of OBJ-like languages (which only consider annotations given as natural numbers) to on-demand strategy annotations. Our on-demand evaluation strategy (ODE) overcomes the drawbacks of previous proposals and also has better computational properties. For instance, we show how to use this strategy for computing (head-)normal forms. We also introduce a transformation which allows us to prove the termination of the new evaluation strategy by using standard rewriting techniques. Finally, we present two interpreters of the new strategy together with some encouraging experiments which demonstrate the usefulness of our approach. © 2009. Source

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