The purpose of an XML Schema is to define the legal building blocks of an XML document: the elements and attributes that can appear in a document the number of (and order of) child elements

什么是 XML Schema？ XML Schema 的作用是定义 XML 文档的合法构建模块，类似 DTD。 XML Schema: 定义可出现在文档中的元素; 定义可出现在文档中的属性; 定义哪个元素是子元素; 定义子元素的次序; 定义子元素的数目; 定义元素是否为空，或者是否可包含文本

XML Schema 支持命名空间; 为什么使用 XML Schema？ 有了 XML Schema，您的 XML 文件就可以携带对其自身格式的描述。 通过 XML Schema，独立的群体可以就交换数据的标准达成一致。 通过 XML Schema，您可以验证数据。 XML Schema 支持数据类型. XML Schema 的最大优势之 …

XML Schema 描述了 XML文档的结构。 在此教程中，你将学习如何在应用程序中读取和创建 XML Schema 语言，XML Schema 为何比 DTD 更加强大，以及如何在您的应用程序中使用 XML Schema。

XML Schema is commonly known as XML Schema Definition (XSD). It is used to describe and validate the structure and the content of XML data. XML schema defines the elements, attributes and data types. Schema element supports Namespaces. It is similar to a database schema that describes the data in a database. Syntax

An XML Schema describes the structure of an XML document, just like a DTD. An XML document with correct syntax is called "Well Formed". An XML document validated against an XML Schema is both "Well Formed" and "Valid".

XML Schema. 下面这个例子是一个名为 "note.xsd" 的 XML Schema 文件，它定义了上面那个 XML 文档（ "note.xml" ）的元素：

This chapter will demonstrate how to write an XML Schema. You will also learn that a schema can be written in different ways.

The XML schema defines the shape, or structure, of an XML document, along with rules for data content and semantics such as what fields an element can contain, which sub elements it can contain and how many items can be present.

2 天之前 · Transforming XML with XSLT. The separation of content and presentation is a key design feature of XML. The structure of an XML document is designed to reflect and clarify important relationships among the individual aspects of the content itself, unhindered by a need to provide any indication about how this data should eventually be presented.