A document instance contains a declaration statement and any additional comments necessary to provide information about a document's content and structure.

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A document instance typically contains the actual content and structure of the document itself, such as elements and attributes in XML or HTML documents. A declaration statement (like the XML declaration) specifies the version and encoding of the document but is not about comments providing information on content and structure. Comments can be added for clarification, but they are not a necessary component for defining a document's content and structure.

A Document Instance Contains a Declaration Statement and Any Additional