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Are Sequence diagrams organized acc to time

 
jay roy
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In this link
http://dn.codegear.com/article/31863

its mentioned that Sequence diagrams are organized according to time
which i dont understand at all. Where is the time information in the diagram. Its not there.

kinda puzzled..

can anybody share the answer with me.

thanks
J
 
Randy Yarger
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Sequence diagrams are all about time. The vertical axis of the diagram is time, starting with the top. So as you travel down the diagram you are moving forward in time and can tell what order the messages follow.
 
jay roy
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ok , but the actual time is not mentioned anywhere right.
 
Randy Yarger
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Correct, there is no quantitative time on the diagram (obviously, you'd have no idea exactly how long an interaction would take place while you're designing the architecture).

Just as your original question states the diagram is "organized by time". That is, you place the messages the order that they're called, from first to last.
 
jay roy
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thanks randy
 
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