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Null DEFINITIONS ::=
BEGIN
-- F.2.9 Null
-- Use a null type to indicate the effective absence of a component
-- of a sequence.
-- EXAMPLE
PatientIdentifier ::= SEQUENCE {
name VisibleString,
roomNumber CHOICE {
room INTEGER,
outPatient NULL -- if an out-patient --
}
}
lastPatient PatientIdentifier ::= {
name "Jane Doe",
roomNumber outPatient : NULL
}
END
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