Eliminate the Work.abstract property and move the Document.content property to Work.content instead. Update affected views, and re-base some classes that were deriving from Document just to get Document.content to now be derived from Work instead. The Document class now has a "pass" body with no additional properties. It is debatable whether Work should become Document, since I am not sure that we plan to be able to generically display, say, a Quiz or a Question (which are Works) on the home page (which can only specifically display a Document, or now, the basic Work entity...). Patch by: Todd Larsen Review by: to-be-reviewed

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from django.dispatch import Signal

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class_prepared = Signal(providing_args=["class"])

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pre_init = Signal(providing_args=["instance", "args", "kwargs"])

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post_init = Signal(providing_args=["instance"])

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pre_save = Signal(providing_args=["instance", "raw"])

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post_save = Signal(providing_args=["instance", "raw", "created"])

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pre_delete = Signal(providing_args=["instance"])

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post_delete = Signal(providing_args=["instance"])

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post_syncdb = Signal(providing_args=["class", "app", "created_models", "verbosity", "interactive"])