This paper presents a set of 22 adaptation patterns, inde- pendent of any application domain and independent of any adaptation engine. They have been translated to LAG and GLAM adaptation lan- guages in order to plug them on existing adaptation engines. Currently, they are used in the EAP framework, which allows defining complex adaptation strategies in Adaptive Hypermedia. We also propose a typol- ogy for the elementary adaptation patterns in order to facilitate their use and their understanding.