You are not likely to have any sort of idea what a kinematic measure is. Don't worry - you're not supposed to know about it. The concept was invented by AnyBody™ Technology as a way of describing dimensions in a kinematic model that you might want to get information about or control with drivers. A joint angle or a distance between two points are examples of kinematic measures. The position of the center of gravity of the entire model or a subset of its segments are other examples.
If you define a kinematic measure in your model, then you can study its development. But more importantly you can control it. You can add a driver to a kinematic measure, and that way control the movement of the mechanism. Such a driver can be added even when the measure is a less tangible quantity like the collective center of gravity that is not attached to a particular segment.
Joints can be understood as kinematic measures equipped with drivers. For instance, a spherical joint is a distance between two points on two different segments that is driven to be zero. This means that, using kinematic measures, you can define types of joints that are not available as predefined objects in AnyScript™.
Do you remember the simple arm example of the "Getting Started: AnyScript™ Programming" tutorial? That was a 2-D model of an arm where we produced the movement by driving the angles of the shoulder and elbow joints direc