Similarit\'e en intension vs en extension : \`a la crois\'ee de
  l'informatique et du th\'e\^atre
  Traditional staging is based on a formal approach of similarity leaning on
dramaturgical ontologies and instanciation variations. Inspired by interactive
data mining, that suggests different approaches, we give an overview of
computer science and theater researches using computers as partners of the
actor to escape the a priori specification of roles.
