What is abstract attribute in a Django model?

What's the purpose to define a Django model with abstr开发者_如何学JAVAact = True ?

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abstract=True means this model is an abstract model class. It does not have a database table and is merely a shared parent model class so that the child models don't need to rewrite all the fields. Each child models will have their own table.

abstract=False means a normal model, django will create a table for it.