This Is Not Geometry; It's Just Variables
The rules around "height," "length," and "width" (hlw) that you just created for your table Design have nothing to do with geometry. And they have nothing to do with the same-named rules in Designs and Models that have a geometric element such as Block mixed in. Your new hlw will serve only as variables that later will drive the geometry of the children of MyTable. Children, which in this case you can think of as subassemblies, are covered in Unit 4.
They are Not Inherited
For the most part, we recommend making Designs in kBridge as generic designs. Generic designs provide the maximum amount of control when brought into Models as Children.
In this case, however, we have directed you to make a more specific design within MyTable. Rather than being inherited from a Mixin (covered later in this Guide), you built hlw directly into the top-level Design. Doing so makes subsequent operations more clear.
