A vernacular is not a real language but is "an abstract set of norms."

A resource is an abstract set of information.

The play's indoor premiere was in Moscow, on an abstract set whose details have faded into history.

Helps to force you back from the abstract set to the reality.

The director relies on a minimal, almost abstract set, in keeping with the ancient Greek style.

Like many Bayreuth productions, this one has abstract sets.

The small volume of space, just an abstract set of coordinates, became the new killing ground.

These filming conditions allowed only a single abstract set, and eclectic costumes.

The control action is assumed to be chosen within some abstract set that contains the control options.

Let be the abstract set of all possible control actions.