Simulation usage definitions

What each figure on the hub-wide usage pages counts.

This chapter lives in the users book, which is written for everyone on a hub rather than for tool authors. Read it there:

• Simulation usage definitions — simulation usage definitions.

The copy that used to sit here was an import of the same page from a parallel source tree. It was left behind when the two trees were merged and is gone now, so that there is one reviewed version rather than two that disagree.