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# XML Schema complexContent Element * * Complete XML Schema Reference Manual](#) * * * ## Definition and Usage The complexContent element defines extensions or restrictions on a complex type (containing mixed content or elements only). ### Element Information * **Parent Element:** complexType ### Syntax ```xml (annotation?,(restriction|extension)) (The `?` symbol indicates that the element can appear zero or one time within the complexContent element.) | Attribute | Description | | --- | --- | | id | Optional. Specifies the unique ID of this element. | | mixed | Optional. Specifies whether character data is allowed between the child elements of this complexType element. The default value is false. | | any attributes | Optional. Specifies any other attributes with non-schema namespaces. | ### Example 1 In the following example, there is a complex type named "fullpersoninfo," which is derived from another complex type called "personinfo" by extending it with three additional elements: ```xml