Introduction to cXML(commerce eXtensible Markup Language)

本文介绍了cXML(commerce eXtensible Markup Language)及其与XML(eXtensible Markup Language)的关系。XML是一种元标记语言，用于创建语言语法，并作为应用程序间传递数据的标准，尤其是在互联网上。cXML文档基于XML文档类型定义(DTD)构建，DTD定义了cXML文档的内容模型，如元素的有效顺序和嵌套，以及属性的数据类型。

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cXML (commerce eXtensible Markup Language).

XML (eXtensible Markup Language) is a meta-markup language used to create
syntaxes for languages. It is also a standard for passing data between applications,
particularly those that communicate across the Internet.
XML documents contain data in the form of tag/value pairs, for example:
<DeliverTo>Joe Smith</DeliverTo>
XML has a structure similar to HTML (HyperText Markup Language), which is an
implementation of SGML, XML’s parent meta language. Applications can extract
and use data from XML documents more easily than from HTML documents,
however, because XML data is tagged according to its purpose. XML contains only
data, while HTML contains both data and presentation information.
cXML Capabilities Chapter 1 Introduction to cXML
18 cXML User’s Guide 1.2.024
Each cXML document is constructed based on XML Document Type Definitions
(DTDs). Acting as templates, DTDs define the content model of a cXML document,
for example, the valid order and nesting of elements, and the data types of attributes.
The DTDs for cXML are files available on the www.cXML.org website.