[XSD learning] composite elements

For XSD, there are two ways to define a composite element:

One, directly within the element declaration, this method can only use this element

<xs:elementname= "Employee">  <Xs:complextype>    <xs:sequence>      <xs:elementname= "FirstName"type= "Xs:string"/>      <xs:elementname= "LastName"type= "Xs:string"/>    </xs:sequence>  </Xs:complextype></xs:element>

Second, declared in a separate type, this method, the type can be shared across multiple elements

<xs:elementname= "Employee"type= "Personinfo"/><Xs:complextypename= "Personinfo">  <xs:sequence>    <xs:elementname= "FirstName"type= "Xs:string"/>    <xs:elementname= "LastName"type= "Xs:string"/>  </xs:sequence></Xs:complextype>

XSD has four types of composite elements, and below we learn the definition of each element

One, empty elements

<pid= "1345"/>

The above element, which does not contain child content, contains only one attribute, declared as follows:

 <  xs:element  name  = "Product"  >  <  xs:complextype  >  <  xs:attribute  name  = "pid"   type  =" Xs:positiveinteger "  />  </ xs:complextype  >  </ xs:element  >  

Ii. elements that contain other elements

< Employee >  < FirstName > John</firstname>  <LastName> Smith</lastname></employee>

The top content contains only two child elements, with no attributes, declared as follows:

<xs:elementname= "Person">  <Xs:complextype>    <xs:sequence>      <xs:elementname= "FirstName"type= "Xs:string"/>      <xs:elementname= "LastName"type= "Xs:string"/>    </xs:sequence>  </Xs:complextype></xs:element>

Three, only the elements of the text (this is not particularly clear)

<type= "Dessert">Ice cream</Food> 

This element is a separate blank text, it should be a simple type, it needs to be declared using simplecontent, but not specifically why it is used as a composite type, not knowing whether it is because of the attribute , it is declared as follows:

<xs:elementname= "Food">  <Xs:complextype>    <xs:simplecontent>      <xs:extensionBase= "Xs:string">        <Xs:attributename= "Dessert"type= "Xs:string" />      </xs:extension>    </xs:simplecontent>  </Xs:complextype></xs:element>

Iv. elements that contain elements and text

< Description >  <lang= "Norwegian">03.03.99</Date  > ... . </ Description >

In order for the character data to appear between the child elements of "description", the mixed property must be set to "true" in the,<xs:sequence> property needs to appear sequentially

<xs:elementname= "description">  <Xs:complextypeMixed= "true">    <xs:sequence>      <xs:elementname= "Norwegian"type= "Xs:string"/>    </xs:sequence>  </Xs:complextype></xs:element>

Note: Each of these elements can contain attributes

[XSD learning] composite elements