"extended by" vs. "extends"
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ccallendar,
chiselgroup
if you use high-level arcs to show the dependencies between packages it seems like you've got circular dependencies because the "extended by"-arcs show the wrong direction in means of dependency. subclass depends on baseclass, so the arc should be named "extends" with reverse direction.
best regard
tobias (derkey at gmx dot net)
creole/shrimp rocks.