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# XML Schema include Element * * Complete XML Schema Reference](#) * * * ## Definition and Usage The include element is used to add multiple schemas with the same target namespace to a document. ### Element Information * **Parent element:** schema ### Syntax (annotation?) (The ? symbol declares that in the include element, this element can appear zero or one time.) | Attribute | Description | | --- | --- | | id | Optional. Specifies a unique ID for the element. | | schemaLocation | Required. Specifies the URI of the schema to be included within the target namespace of the containing schema. | | any attributes | Optional. Specifies any other attributes with non-schema namespaces. | ### Example 1 Through the included schema, the included files must all reference the same target namespace. If the schema target namespaces do not match, the include will not be valid: .. .. .. * * * [![Image 4: XML Schema Reference](