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UML Diagrams
Zicomi Systems publishes some UML example diagrams online from the world famous UML dictionary.
Version 2.5 Released
Zicomi Systems is delighted to announce that version 2.5 of Zicomi Mentor is released. With support for UML 2.0 and all thirteen UML diagrams
Zicomi Systems' Director
speaks about the UML at Objects by Design - an informative interview
Partner Programme
Zicom Systems is delighted to announce a new world wide partner programme, become a partner today.
OMG Member
Zicom Systems is made a member of the OMG!
Time Constraint
Time Constraint  
A time constraint is a type of interval constraint that specifies that one or more model elements must conform to a restriction specified by a time interval. A time constraint is not the time interval itself but a constraint, which associates the interval with one or more elements specifying how it restricts the elements, time semantics.


Like any constraint the time constraint is used when the formal semantics of an element are insufficient to express some restriction on the modeled elements. A time interval defines minimum and maximum values defining a range, and this range can be applied to one or more model elements by the use of a time constraint. If the constraint does not evaluate to TRUE in a running system the time interval is considered to be invalid.

Unified Modeling Language and UML are either registered

trademarks or trademarks of Object Management Group, Inc. in the

United States and/or other countries.