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# XML Schema appinfo Element * * Complete XML Schema Reference](#) * * * ## Definition and Usage The appInfo element specifies information to be used by applications within an annotation element. This element must be located within an annotation. ### Element Information * **Parent element:** annotation ### Syntax Any well-formed XML content | Attribute | Description | | --- | --- | | source | Optional. A URI reference specifying the source of the application information. | ### Example 1 TUTORIAL Note This Schema defines a TUTORIAL note! . . . * * Complete XML Schema Reference](#)