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  OMG Standards
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  Have You Heard?
UML Diagrams
Zicomi Systems publishes some UML example diagrams online from the world famous UML dictionary.
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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
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Zicomi Systems' Director
speaks about the UML at Objects by Design - an informative interview
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Partner Programme
Zicom Systems is delighted to announce a new world wide partner programme, become a partner today.
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OMG Member
Zicom Systems is made a member of the OMG!



  • hundreds of interactive example UML diagrams
  • comprehensive explanations of UML 2
  • can be used as a UML tutorial
  • hints, tips and usage guidelines
  • self-paced quizzes
  • Online UML Dictionary

The product is easy to use, intuitive and can be used by business and technical people providing a reference that is appropriate for beginners and experts alike...
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Zicom Mentor Screen
  Today's UML Element
State Invariant
State Invariant
A state invariant is an interaction fragment that places a constraint on the state of the lifeline on which it is located. The lifeline represents a set of instances and the constraint applies to these instan... more...
  Today's Testimonial
"As a developer of UML training courses I have found Zicom Mentor to be an invaluable reference tool. It provides me with clear, concise definitions of UML elements coupled with interactive examples of actual UML models. I never fail to recommend it to my course participants."
Phil Robinson
Principle Consultant
Lonsdale Systems
  Today's Thought Leader
Leonhard Euler (1707 - 1783)
Euler was a Swiss Mathematician and worked in many areas of pure mathematics. He is credited as being the father of graph theory when in 1736 he published a solution to the Koenigsberg bridges' problem, over the two branches of the Pregel River. The UML depends on graph theory - each UML diagram is essentially a graph.
Unified Modeling Language and UML are either registered

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

United States and/or other countries.