PL SQL Data Types Oracle PLSQL Tutorial

The MSLABEL datatype is used with Trusted Oracle.
Trusted Oracle is designed for high security environments.
The Syntax for the MSLABEL Datatype

variable_name MSLABEL;
In a Trusted Oracle system, this datatype is used to store binary operating system labels.
Standard Oracle allows the datatype to be declared, but only null values can be assigned to it.