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Schema (XSD) 中的 XML Schema complexContent 元素


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Definition and Usage
定义和用法

The complexContent element defines extensions or restrictions on a complex type that contains mixed content or elements only.
complexContent元素的作用是:在包含混合内容和元素的复合类型(complex type)上定义扩展或限制。

Element Information
元素信息

  • Parent elements: complexType
    父类元素:omplexType[复合类型]

Syntax
语法

<complexContent
id=ID
mixed=true|false
any attributes
>
(annotation?,(restriction|extension))
</complexContent>

(The ? sign declares that the element can occur zero or one time inside the complexContent element)
“?”符号用于声明元素在complexContent元素中可以出现的次数(0次或1次)

属性 描述
id Optional. Specifies a unique ID for the element
可选参数。为元素指定一个独立的ID
mixed Optional. Specifies whether character data is allowed to appear between the child elements of this complexType element. Default is false
可选参数。指定是否允许字符数据在complexType类型元素的子元素中出现。默认值为false[假]。
any attributes Optional. Specifies any other attributes with non-schema namespace
可选参数。指定非schema命名空间的其它属性

Example 1
案例1

The following example has a complex type, "fullpersoninfo", that derives from another complex type, "personinfo", by extending the inherited type with three additional elements (address, city and country):
下面的案例中包含一个符合类型“fullpersoninfo”,它源于另外一个符合类型“personinfo”,通过扩展了另外三个元素(address、city、country)的继承类型:

<xs:element name="employee" type="fullpersoninfo"/>
<xs:complexType name="personinfo"> <xs:sequence> <xs:element name="firstname" type="xs:string"/> <xs:element name="lastname" type="xs:string"/> </xs:sequence>
</xs:complexType>
<xs:complexType name="fullpersoninfo"> <xs:complexContent> <xs:extension base="personinfo"> <xs:sequence> <xs:element name="address" type="xs:string"/> <xs:element name="city" type="xs:string"/> <xs:element name="country" type="xs:string"/> </xs:sequence> </xs:extension> </xs:complexContent>
</xs:complexType>

In the example above the "employee" element must contain, in sequence, the following elements: "firstname", "lastname", "address", "city", and "country".
在上述案例中,“employee”元素必须按顺序包含下列元素:"firstname"、"lastname"、"address"、"city"和"country"。

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