Simple referencing of rules within a given model is done by simply typing "this." in front of it, meaning "the object we're editing." The syntax for referencing a Rule from the current part is simply:
this.<Rule Name>
For example, to reference the length of the table from the width Rule, you specify:
this.length
Examples of "This" in action:
Child and Index
In the Child Rule context, there is a special reference – Child. Child allows you to reach down to the Child under a Child group to get the value of a property in the Child. NOTE: All children have a special property called index, which indicates which Child it is. The index of the first Child is 0, the second Child index is 1, and so on.
