Mechanical or thermal interaction between two interfaces or between one interface and the
inertial system are defined using links. It is defined by a target and a source interface.
The interaction between displacement and velocities is characterized by the damping and stiffness matrices,
which can be defined in the link properties catalog.
For both location and orientation of a link, a master can be defined. If a master
interface is defined, the slave interface location or orientation is then changed
to the one of the master. This allows to ensure an exact matching of the location for
both interfaces of a link.