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    An XML Schema, also known as XML Schema Definition (XSD), is a language used to define the structure and constraints of an XML document. It serves as a blueprint for XML documents, specifying the elements, attributes, and data types that can appear in the document, as well as the order and number of child elements.

    Key Features of XML Schemas

    Structure Definition

    XML Schemas define the structure of an XML document by specifying the elements and attributes that can appear, their data types, and the order and number of child elements. For example, the following XML Schema defines a simple structure for a "note" element:

    <?xml version="1.0"?>
    <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="note">
    <xs:complexType>
    <xs:sequence>
    <xs:element name="to" type="xs:string"/>
    <xs:element name="from" type="xs:string"/>
    <xs:element name="heading" type="xs:string"/>
    <xs:element name="body" type="xs:string"/>
    </xs:sequence>
    </xs:complexType>
    </xs:element>
    </xs:schema>

    Data Types

    One of the strengths of XML Schemas is their support for data types. XML Schemas provide a wide range of built-in data types, such as string, integer, date, and boolean, as well as the ability to define custom data types. This makes it easier to validate the correctness of data and convert data between different types.

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  1. 包含 xml Schema 的结果。
    是否只需要 XmlSchemas 的结果?
  3. 包含 xml Schema 的结果。
    是否只需要 XmlSchemas 的结果?
  4. 某些结果已被删除