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A dashed vertical line below a participant.
Also known as: Object lifeline, Vertical dashed line UML
The UML sequence diagram notation representing a participant's existence over time, drawn as a dashed vertical line.
Represents a participant's existence over time in a UML sequence diagram.
Contexts: Technical drawing, Software
Runs time down the page, so a sequence diagram is read vertically where a class diagram has no reading direction at all.
Contexts: Technical drawing, Software
A dashed vertical line descending from a labelled box, time running down the page.