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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!
General Ordering
General Ordering  
A general ordering is a named element that relates two event occurrences (message ends) specifying that the event occurrence at the tail end must occur before the event occurrence at the arrowhead end of the message.


A general ordering has the appearance of a message however it is not itself a message, but a device to specify sequence (ordering) in an interaction. An event occurrence is the point at which a message end targets a lifeline, and the general ordering is used to specify that the event occurrence at the tail end occurs before the event occurrence at the arrowhead end. A general ordering can be distinguished from a message by the arrow that is positioned centrally on the dotted line. Messages have different arrowheads but they are always positioned at the end of the line.

Unified Modeling Language and UML are either registered

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

United States and/or other countries.