Web语境敏感页面分层设计实现方法

摘要

语境context也称为上下文.针对Web语境敏感页面设计的复杂性问题,遵循EVP原则并借鉴COP,提出一种面向语境风格(COS,Context-Oriented Style)的页面分层语法.给出COS页面转换框架并说明其工作原理.区别于COP语言,COS在当前Web页面标签语言基础上设计了一种层槽语法,采用四元组来描述页面元素的变化,并设计实现一个解释器来实施变化.不同于传统的以元素为中心的页面描述方式,COS特点是语境条件为中心.通过实例验证COS方案简单有效,并具有语境变化适应性,同时增强安全控制的可验证性.%For the problem of Web context-aware page design complexity,follow the EVP principle and COP for reference,this paper puts forward a context-oriented style page-layered syntax.The transformation framework of COS page and its working principle are given out.Different from COP language,COS design a layer-slot grammar based on current Web page markup language,the form of four-tuple is used to describe the change of page elements,also it designs and implements a interpreter to implement change.Different from the traditional elements centered page description way,the characteristics of the COS are the context condition as the center.The instances show that COS scheme is simple and effective,and has the context changes adaptability,at the same time,strengthens the verifiability of security control.