The Generic Implant Template Information Object Definition (IOD) specifies the description of a 2D- and/or 3D-template representing a rigid and passive implant. The specific properties of flexible implants, such as silicone implants, and active implants such as cardiac pacemakers are not reflected. The IOD contains mechanisms for implant assembly, i.e., the rigid connection of two or more implants and implant registration, i.e., the placement of an implant in relation to anatomical landmarks.