Are Categories really a subdivision of node Types, i.e. Nodes of a certain Type that have certain Properties in common?
I have several node Types that are related and similar. They all have a Property in common. Is there any way to "group" them into a Category?
Specifically, I have implemented a Time Tree as documented elsewhere, with Year, Month and Day nodes. It could be convenient to define a Category that includes all three of these. They all have a Property named "string" which could be used to identify them.