Description of the model of Scenarios and LEL

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July 2nd, 2018

As part of his secondment to the University of Lorraine, professor Leandro Antonelli from the National University of La Plata, held a teaching section on The Model of Scenarios and LEL, and its applicability to RUC-APS.

Scenarios describe interactions between users and a future system. It is also used to understand the context of the application. Leite defines a scenario with the following attributes: (i) a title that identifies the scenario; (ii) a goal or aim to be reached through the execution of the episodes; (iii) a context that sets the starting point to reach the goal; (iv) the resources, relevant physical objects or information that must be available, (v) the actors, agents that perform the actions, and (vi) the set of episodes.

The Language Extended Lexicon (LEL) is a glossary used to capture and describe the domain´s language.

Terms (also called symbols) are classified into four types: Subject, Object, Verb, and State. Subjects represent an active element that performs actions. Objects are passive elements on which subjects perform actions. A verb is used to represent the actions. Finally, States represent situations in which subjects and objects can be located.

A symbol is described by two attributes: (i) the notion and (ii) the behavioral responses. Notion describes the symbol denotation and explains its literal meaning. While Behavioral responses describe its connotation, that is, the effects and consequences of the relationship between the defined symbol and others symbols defined in the LEL.