Just as assemblies can be comprised of sub-assemblies and sub-sub assemblies, and components can be comprise of sub-components and sub-sub components that can have relations between on another, I would like sketches to be comprised of sub-sketches and sub-sub sketches, and I would like to be able to define relations (alignments, positions, dimensions) between objects in each layer, and the layers themselves. Layers be a 2-dimensional spatial representation (literally a layer) or a collection of sketch objects.
I am thinking of somethign like the equivalent of hierarchical Layers in Illustrator.
For a few example, I'd like to place all the dimensions for a sketch in a dimensions layer, and all the constraints in a constraints layer, and be able to turn them on and off (visually and functionally).
-jamie