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I need to communicate the concept that there are 3 endpoints each of which take a certain input and produce a certain output.

I don't need to represent any issues of timing or any state.

Obviously I can come up with something to represent this but just curious, is there a UML-y or some other chart format specifically for this type of chart?

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Maybe a sequence diagram can do the trick ? – marco-fiset May 31 '12 at 20:18
@marco-fiset - not really, a sequence diagram is explicitly about timing which I'm not looking to model – George Mauer May 31 '12 at 21:48

2 Answers

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Sounds like a Data Flow Diagram to me.

diagram

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@Dynamic: THANKS! – John R. Strohm Jun 2 '12 at 15:37
No problem! Answers always look better with pictures :-) – Dynamic Jun 2 '12 at 19:58
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In the very old days, IBM used a charting method called HIPO (Hierarchy plus Input-Process-Output). You may be interested to take a look at it at: HIPO.

UML offers nothing but "Activity Diagram".

Good old flow charting may be the best though!

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