Cellular component disjoint classes
The GO CC hierarchy contains many classes that should probably be declared disjoint. For example, nothing is both an intracellular region and an extracellular space. Similarly nothing is both a cell and a cytoplasm (of course cell and cytoplasm spatially overlap. disjoint_from is about set-disjointness, not spatial disjointness). Addng disjoint_from links prevents TPVs (for evidence see below_
But we don't want to add disjoint_from links willy-nilly. We should be methodical to reduce the amount of work that needs don
Working area
We use the scratch/ directory in cvs