Design Patterns -- Abstract Factory

The intent of Abstract Factory is to provide for the creation of a family of related, or dependent, objects. see pic:

Additional note is below:( reference from http://www.dofactory.com) : 

• AbstractFactory  (ContinentFactory)
  • declares an interface for operations that create abstract products
• ConcreteFactory   (AfricaFactory, AmericaFactory)
  • implements the operations to create concrete product objects
• AbstractProduct   (Herbivore, Carnivore)
  • declares an interface for a type of product object
• Product  (Wildebeest, Lion, Bison, Wolf)
  • defines a product object to be created by the corresponding concrete factory
  • implements the AbstractProduct interface
• Client  (AnimalWorld)
  • uses interfaces declared by AbstractFactory and AbstractProduct classes

 using the term: 产品族（Product Family）,the former pic is like:

 

 

In this pattern, speaking loosely, a package is usually a "family" of classes, and an abstract factory produces a "family" of objects.