Point definition
 @POINT_DEFINITION {
 @POINT_NAME {PointName} {
 @COORDINATES {x_{1}, x_{2}, x_{3}}
 @IS_DEFINED_IN_FRAME {FrameName}
 @COMMENTS {CommentText}
 }
 }
Notes
Figure 1. Definition of a point.

A point is a basic geometric object that defines a fixed position in space. The position vector of the point is defined by its Cartesian coordinates, (x_{1}, x_{2}, x_{3}), resolved in the inertial frame, I = (i_{1}, i_{2}, i_{3}), as depicted in fig. 1.

It is possible to define a point with respect to a fixed frame.

If this keyword @IS_DEFINED_IN_FRAME is absent, the point is defined with respect to the inertial frame, I = (i_{1}, i_{2}, i_{3}).

If the optional keyword @IS_DEFINED_IN_FRAME is present, the point is with respect to fixed frame FrameName.

It is possible to attach comments to the definition of the object; these comments have no effect on its definition.