Point
=====

A point has a location, velocity, and acceleration relative to the inertial reference frame. Points are  used to define interfaces between multiple parts in the mechanism, to position bodies (masses and inertias), or as locations of applied forces.

**Keyword Arguments**

:param str name: Key to be used when referencing this point.

:param str ref_point_key: Key of the point from which the created points position will be measured.

:param str vector_key: Key of the vector used to define the position of the created point relative to the reference point.

:return str: Message about the created point