XML schema

XML framework

XML Pattern （ Also known as XML Mode definition or XSD） Used to describe XML Document structure . It is DTD substitute .

Why Architecture Matters ？

DTD Not as powerful as the mode , Because its scalability and flexibility are not enough . therefore , It may not be suitable for some situations . under these circumstances , Patterns are important . Use XML The main purpose of a pattern is to define XML Elements and attributes of documents .

XML Architecture and DTD What's the difference? ？

The following comparison shows XSD（XML Pattern ） And DTD The difference .

The following code snippet shows XML Examples of patterns ：

<xs:schema xmlns:xs = "http://www.w3.org/2001/XMLSchema">

    <xs:element name = "employee">

        <xs:complexType>

            <xs:sequence>

                <xs:element name = "firstname" type = "xs:string" />

                <xs:element name = "lastname" type = "xs:string" />

                <xs:element name = "phone" type = "xs:int" />

            </xs:sequence>

        </xs:complexType>

    </xs:element>

</xs:schema>