Tuple

An identifiable set of data values treated as a unit, an occurrence of a schema in a database, or collection of atomic data items describing a specific object, event, or tuple (e. g. , row of a table).
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The address of a record (or other data grouping) contained in another record so that a program may access the former record when it has retrieved the latter record. The address can be absolute, relative, or symbolic, and hence the pointer is referred to as absolute, relative, or symbolic.
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A table of subjects and objects that indicates the actions or functions that each subject can perform on each object. Each column of the matrix is an ACL. Each row of the matrix is a capability list.
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Each row of an access control matrix is a capability list. A capability list is tied to the subject; it lists valid actions that can be taken on each object.
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The practice of tagging each record with some moment in time, usually when the record was created or when the record was passed from one environment to another.
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