1. An
identifier within or attached to a
set of
data elements.
2. One or more characters that (a) are within or attached to a set of data elements and (b) represent
information about the set, including its identification.
3. In
communications, information within a
message that is used to identify specific
system parameters, such as the particular
circuit with which the message is associated.
Note: Messages that do not relate to
call control should not contain a label.
4. In programming languages, an identifier that names a statement.
5. An identifier that indicates the sensitivity of the attached information.
6. For classified information, an identifier that indicates (a) the
security level of the attached information or (b) the specific category in which the attached information belongs.