可延展的 WWW 編製模式

Abstract

分散式超媒體資訊系統, 目前受到全球資訊界極大的重視。 這 是因為它能結合下述三個重要的優點: (1) 超文字瀏覽資訊模式; (2)多媒體資訊的呈現; (3) 以涵蓋全球電腦系統的Internet 國 際網路為其分散式資料庫。 其中最受歡迎的即是 WWW (World-Wide Wed) 全球資訊網。 雖然 WWW有一些好的瀏覽工具, 但是卻仍缺乏易學易用且完整 的編製系統, 有許多 WWW 資訊格式目前尚未能編製工具能以 WYSIWYG (What-You-See-Is-What-You-Get) 的方式編製, 例 如: 填表單、表格 等。 在本論文將描述, 我們發展的一個WYSIWYG 編製系統, 它 可以讓使用者直接編製WWW文件, 整個編製系統的特徵與一般 的文字編輯器非常類似。 目前它支授HTML 3.0的主要特徵, 例如: 填表單、表格及數學符號。 更進一步地大部份現有的編製系統都是以單石(monolithic) 的 方式來完成, 意思也就是說, 編輯器只能編輯那些事先有定義 過的資料型態。當有一個新的資料型態或是新的交談功能出現 時, 編輯器必須要重新更改之後才可以處理這些新的功能。根 據我們發展編製系統的經驗, 我們提出一個新的可延展編製模 式, 利用這個模式讓編製系統可以動態地認得新的資料型態編輯此資料型 態。 Currently, distributed hypermedia systems are extremely popular. This is because they have the following three important advantages. (1) using hypertext's browsing model; (2) displaying of multimedia document; (3) accessing all information connected to the Internet. Among these distributed hypermedia systems, WWW (World-Wide Wed) is the most important and popular one. Although WWW has several nice browsing tools, there have been lack of good authoring tools supporting complete features. There are still some WWW features which cannot supported by current authoring system in the WYSIWYG way (What-You-See-Is-What-You-Get). For example, forms, tables etc. In this thesis, we have developed an WYSIWYG authoring tool that enables users to create WWW documents directly. The tool*s features are very similar to a general text processor. Currently, the tool supports main features of HTML 3.0, e.g. tables, forms and maths. Most authoring tools are building in a monolithic fasion. This is, they deal with those predefined format only. When a new feature in the formats added, the tools must be upgraded to recognize the new situation. According to previous experience, we propose a new extensible authoring model that allows an authoring tool to deal with a new feature dynamically.