Computer systems define data in their own terms to meet specific internal needs of the organization
　
Data exchange with external systems requires a common agreement on the meaning of the data

International exchange of data will require international standards to define the data
　

　
Vessel security monitoring requires access to shipboard information. Much of this information resides in various unconnected shipboard systems. The standard addresses how these systems may be integrated into a fleet management system which can then be monitored from shore offices.
　

　

Security is dependent on the worldwide exchange of information concerning cargo, ships and personnel. This will only be possible if all the various databases housing the information have some way to link their data to other data with the same meaning, even if it is called by some other name. This standard defines the use of Data Dictionaries to serve as a common link between multiple databases.