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Chương này được thiết kế để cung cấp một giới thiệu nhanh đến cấu trúc ngữ đánh dấu (SGML và XML). Nếu bạn đã quen thuộc với SGML hay XML, bạn chỉ cần phải đọc lướt chương này. Để làm việc với DocBook, bạn cần phải hiểu một vài khái niệm cơ bản chỉnh sửa cấu trúc nói chung, và DocBook, nói riêng. Đó là được bảo hiểm ở đây. Bạn cũng cần một số kinh nghiệm cụ thể với cách một DocBook tài liệu có cấu trúc. Đó là bao gồm trong chương kế tiếp | Chapter 1. Getting Startedwith SGML XML This chapter is intended to provide a quick introduction to structured markup SGML and XML . If you re already familiar with SGML or XML you only need to skim this chapter. To work with DocBook you need to understand a few basic concepts of structured editing in general and DocBook in particular. That s covered here. You also need some concrete experience with the way a DocBook document is structured. That s covered in the next chapter. 1.1. HTML and SGML vs. XML This chapter doesn t assume that you know what HTML is but if you do you have a starting point for understanding structured markup. HTML Hypertext Markup Language is a way of marking up text and graphics so that the most popular web browsers can interpret them. HTML consists of a set of markup tags with specific meanings. Moreover HTML is a very basic type of SGML markup that is easy to learn and easy for computer applications to generate. But the simplicity of HTML is both its virtue and its weakness. Because of HTML s limitations web users and programmers have had to extend and enhance it by a series of customizations and revisions that still fall short of accommodating current to say nothing of future needs. SGML on the other hand is an international standard that describes how markup languages are defined. SGML does not consist of particular tags or the rules for their usage. HTML is an example of a markup language defined in SGML. XML promises an intelligent improvement over HTML and compatibility with it is already being built into the most popular web browsers. XML is not a new markup language designed to compete with HTML and it s not designed to create conversion headaches for people with tons of HTML documents. XML is intended to alleviate compatibility problems with browser software it s a new easier version of the standard rules that govern the markup itself or in other words a new version of SGML. The rules of XML are designed to make it easier to write
