INFORMATICA International Journal Main Page Editorial Board Abstracting/Indexing Instructions to Authors Subscription Information Contents Author Index Papers in Production		INFORMATICA, 2008, Vol. 19, No. 3, 345-362 © Institute of Mathematics and Informatics, ISSN 0868-4952 Viewcharts: Syntax and Semantics Ayaz ISAZADEH, Jaber KARIMPOUR Department of Computer Science, University of Tabriz 29 Bahman Blvd., 5166616471 Tabriz, Iran E-mail: karimpour@tabrizu.ac.ir Abstract In this paper, we present a method for describing the syntax and semantics of viewcharts. Viewcharts is a visual formalism for describing the dynamic behavior of system components. We define the syntax of viewcharts as attributed graphs and, based on this graph, describe dynamic semantics of viewcharts by object mapping automata. This approach covers many important constructs of viewcharts, including hierarchy of views, ownership of elements, scope, and composition of views in separate, orand andways. It also covers completion and interlevel transitions as well as history transitions without violating the independence of views. Viewcharts was originally based on statecharts; in this paper we also change the basis of viewcharts to an extended version of Finite State Machine (EFSM). Keywords: visual languages, viewcharts, syntax definition, formal operational semantics, object mapping automata To preview Lithuanian abstract see full article text To preview full article text in PDF format click here You could obtain free Acrobat Reader from Adobe
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