Time in a sequence diagram is all a about ordering, not duration. The vertical axis represents time proceedings (or progressing) down the page.However, the elements on the horizontal axis may appear in any order Conventionally, the objects involved in the operation are listed from left to right according to when they take part in the message sequence.The horizontal axis shows the elements that are involved in the interaction.Sequence Diagrams show elements as they interact over time and they are organized according to object (horizontally) and time (vertically): Object Dimension Either model generic interactions (showing all possible paths through the interaction) or specific instances of a interaction (showing just one path through the interaction).Model the interaction between objects within a collaboration that realizes an operation.Model the interaction between object instances within a collaboration that realizes a use case.Model high-level interaction between active objects in a system.Add a lost or found occurrence next to the lifeline, and draw a message from the occurrence to the lifeline.To create a found message, do as follows: Add a lost or found occurrence next to the lifeline, and draw a message from the lifeline to the occurrence.A found message is denoted with a black circle at the starting end of the message. To create a lost message, do as follows: Enterprise Studio Online automatically turns the message into a > message.Ī lost message is denoted with a black circle at the arrow end of the message. Draw a destruction occurrence at the bottom of the lifeline, and then draw a message to the destruction occurrence.To create a delete message, do as follows: The lifeline will be positioned to start at the message.Ī delete message is sent to terminate another lifeline. Enterprise Studio Online automatically turns the message into a > message. Draw a message to the target lifeline element.To create a create message, do as follows: It is drawn to the start of the lifeline.
Creating a create messageĪ create message is used to represent the creation of a lifeline. It automatically turns into a reply message. Instead of setting a return message as a reply message after drawing it, hold down Alt when drawing the return message.
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