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Secure XML: The New Syntax for Signatures and Encryption by Kitty Niles, Donald E. Eastlake

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4.6. Notation Declarations

Notation declarations provide labels for content in a document. The XML Recommendation [XML] requires that the DTD contain all notation declarations for a document. You use notations to identify file types or for a variety of other tasks. Notations can identify the following items by name:

  • The format of unparsed entities

  • The format of elements that bear a notation attribute

  • The application to which a processing instruction is addressed

Notation declarations provide a name for the notation, which you can then use in entity and attribute-list declarations and specifications. Notation declarations can also provide a name for an external identifier for the notation that allows an XML processor or its client application to ...

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