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a completely self-contained definition of a FITS table column, image, or keyword
an identifiable piece of data which can have unique access attributes
a unique entry in a metadata registry
See ATTRIBUTE. Also known as field and column.
An attribute of an entity.
The most atomic, pure, and simple fact that either describes or identifies an Entity. Also known as an Attribute. May be deployed as a Column in a Table in a physical structure.
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