A Parent is a Model that contains Children. Children are created by Child Rules in Designs. For a Child Rule to behave properly, it must include the BaseAssembly Design as a Mixin.
There are 3 basic Designs that can be used as Mixins for the Designs you develop, depending on the requirements of your designs.
oBaseModel can't have children or geometry—it is the lightest of the 3
oBaseNode can have children but no geometry
oBaseAssembly can have children and geometry.
So far, you have seen Designs and the instances of a single Design (and these instances are Models) in the model tree. Now we are going to learn how to add Children to a Design. This is our way of representing assemblies (Parents) and sub-assemblies (Children).
Children
A Child is a Model that has a parent and is shown in the Design or Model Trees under the parent. A parent can provide Parameters to each of its children. Children generally exist in a Child Group.
