Tell me how it??™s used, and I??™ll tell
you what it means
.
???
18.1.3 Problems of Interoperability: Control and Ownership
In any relationship between at least two systems one must be able (at the very least) to sever relations
with the other. One may thus be said to dominate or have control over another. This relationship can
be expressed using deontic logic (see section A.3 in Appendix A
).
With very large systems composed of
other systems these relations can become very complex. The circumstances under which system
A
may
control system
B
may also vary. Thus a system for managing police radio communications may normally
be under the control of the police. In the event of a terrorist attack, control may be ceded to some other
organization consisting of government, military, and emergency services. Conditions for such a cession
may involve a complex protocol which must be followed to ensure that the cession of control is complete
and does not create more problems than it solves. Thus in the event of a terrorist attack ambulances
carrying road accident victims should not be diverted from their current task until the victims have
reached an accident and emergency center. However, should the attack involve poison gas, you don??™t
want ambulances driving through gas clouds.
The control of some system may also be locality-related. A terrorist attack in Memphis should not
necessarily affect the emergency services operation in Seattle.
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