1LIMSI-CNRS, Orsay, France; Université Paris 13, Sorbonne Paris Cité, France. 2Université Bordeaux, ISPED, Centre INSERM U897, ERIAS, France. 3STL UMR8163 CNRS, Université Lille 3, France. With the recent and intensive research in the biomedical area, the knowledge accumulated is disseminated through various knowledge bases. Links between these knowledge bases are needed in order to use them jointly.