Contemporary ballet is a form of dance influenced by both classical ballet and modern dance. It takes its technique and use of pointe work from classical ballet, although it permits a greater range of movement that may not adhere to the strict body lines set forth by schools of ballet technique. Many of its concepts come from the ideas and innovations of 20th century modern dance, including floor work and turn-in of the legs
sumber : http://www.washingtonballet.org/news-media/ballet-101/