FSM behavioral modelingapproach for hypermedia web applications

在1995年至1998年期间，网站几乎完全由静态html文件组成。它们是100%的接口，但在1998年，这一比例下降到90%，在2002年，它们占互联网上可用接口的比例不到50%。这个百分比和web应用程序的复杂性成反比。网站的界面在不断减少，而web应用程序的复杂性在不断增加。如今，web应用程序是由使用HTML、XML、JavaScript等多种语言实现的分布式软件提供支持的。这种异质性鼓励了具有一定软件工程经验的研究人员探索WWW，因此他们提出了一种新的方法，称为Web工程。Web工程并不是软件工程的完美克隆，但它借鉴了软件工程的许多基本概念和原则，强调了相同的管理和技术活动。它的工作产品导致分析模型、设计模型和测试过程。在此背景下，许多工作都致力于为web应用程序定义设计模型，以实现可重用和结构良好的web应用程序。新提出的方法就是这些努力的成果。例如，FBM-HWA方法属于设计模型的范畴。它不是纯粹基于面向对象的概念，也不像大多数现有方法那样，为了标记目的而引用UML。它使用有限状态机（FSMs）对web应用程序的行为进行建模，并通过向开发人员和测试人员提供应用程序的总体概述，立即简化了他们的任务。我们相信，通过使用FSMs对web应用程序建模，可以创建模型，在几乎任何条件或情况下为未预料到的动作提供确定性响应。

In the period between 1995 and 1998, websites were almost entirely composed of static html files. They were 100% interfaces but in 1998 the percentage decreased to 90% and in year 2002 they constituted less than 50% of those available on the Internet. This percentage and the complexity of the web applications are inversely proportional. Interfaces websites are in continuous decrease and the complexity of web applications is in a continuous increase. Nowadays, web applications are powered by distributed software implemented using a myriad of languages like HTML, XML, JavaScript, etc. This heterogeneity encouraged the researchers who have had a certain experience with software engineering to explore the WWW and thus they proposed a new approach called Web Engineering. Web engineering is not a perfect clone of software engineering but it borrows many of its fundamental concepts and principles emphasizing the same management and technical activities. Its work products lead to analysis models, design models and test procedures. Within this context many efforts have been addressed towards defining design models for web applications to implement reusable and well structured web applications. The newly proposed approach is the fruit of such efforts. For instance, the FBM-HWA approach falls within the basket of design models.  It is not purely based on an object oriented concept and does not refer to UML for notation purposes , as it is the case in most existing approaches. It models the behavior of web applications using Finite State Machines (FSMs) and simplifies the task of developers and testers at once by providing them with a total overview of the application.  We believe that by modeling web applications with FSMs, it becomes possible to create models that present deterministic responses for unanticipated actions in almost any condition or situation.