Inversion Of Control (= Hollywood Principle)

Simply it means,

"Don't call us, we'll call you."

In case of the library, you would call its API but, A framework would call your implementation. In addition, a framework would control to create and destroy an object instead of you.

Template method which is one of the GOF patterns is very related to this.

• Helpful sites:

http://martinfowler.com/bliki/InversionOfControl.html

http://vandbt.tistory.com/43