Yoga Asana Postures can be classified in 2 main levels. The two main categories are Meditative and Cultural. Cultural also has sub classification viz. Relaxative. The Relaxative postures are fatigue releasing postures.

ASANA - POSTURES
     
MEDITATIVE
CULTURAL
Padmasana
Physical
Relaxative
Siddhasana
Sirsasana
Shavasana
Svastikasana
Sarvangasana
Makarasana
Samasana, etc
Bhujangasana
Halasana
SuptaVajarasana , etc