UML Diagrams Zicomi Systems publishes some UML example diagrams online from the world famous UML dictionary. more...
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 more...
Zicomi Systems' Director speaks about the UML at Objects by Design - an informative interview more...
Partner Programme Zicom Systems is delighted to announce a new world wide partner programme, become a partner today. more...
OMG Member Zicom Systems is made a member of the OMG!
Lifeline (Value)
A lifeline (Value) is a visual synonym of a lifeline. It adds no additional semantics; it is simply an alternative presentation of the lifeline element adapted for use on a timing diagram. In this form of the lifeline the instance is represented by two parallel lines that expand and contract, converging at a point, before diverging again. The point of convergence marks an event occurrence where an event changes the lifeline in some way giving the element its characteristic concertina (or sausage) appearance. Time is represented on the horizontal axis. Two contiguous and parallel lines represent the state of the instance at any point in time. There is no standard form of this element as it has different presentations in the three different types of interaction diagrams and has two different presentations on the timing diagram.
