include or extends (UML java) -

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can tell me if have use include dependency or extends one?

use_case : select , load file

use_case b : show waveform

whenever user selects , loads audio file, waveform displayed.

i think use_case , use_case b should connected extends .... right? thank you

i'd include not extend.

reason: purpose user's point of view display waveform. selecting , loading file means towards end, not end in itself. it's difficult see select , load file ever having use on it's own: doesn't represent valuable end-user functionality. ever exist uc if common step in more 1 'real' ucs.

hth.


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