From Extensible Markup Language (XML) 1.1 ( 2004-02-04) Notations identify by name the format of unparsed entities, the format of elements which bear a notation attribute, or the application to which a processing instruction is addressed.

From Extensible Markup Language (XML) 1.0 ( 2000-10-06) Notations identify by name the format of unparsed entities, the format of elements which bear a notation attribute, or the application to which a processing instruction is addressed.

An XML declaration that associates a processing application (such as Paint Shop Pro) with a type of binary entity(such as a JPEG file.)

Within AETL, notations consist of definitions, tables, quotations, and correlations.