Aspects

• Aspects are the basic units for implementing aspect-oriented crosscutting concerns.
• Aspects can include data members and methods.
• Aspects can have access specifications
• Aspects can declare themselves to be abstract
• Aspects can extend classes and abstract aspects, as well as implement interfaces.
• Aspects can be embedded inside classed and interfaces as nested aspects.
• Aspects cannot be directly instantiated.
• Aspects cannot inherit from concrete aspects.
• Aspects can be marked as privileged. This gives them access to the private members of the classes they are crosscutting.