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# XML Schema documentation Element * * Complete XML Schema Reference Manual](#) * * * ## Definition and Usage The documentation element inserts text comments into a schema. This element must be located inside an annotation element. ### Element Information * **Parent Element:** annotation ### Syntax Any well-formed XML content | Attribute | Description | | --- | --- | | source | Optional. Specifies the source of application information. | | xml:lang | Optional. Specifies the language used in the content. | ### Example 1 Note This Schema defines a note! . . . * * Complete XML Schema Reference Manual](#)