And it certainly is the operating principle of her films.

The group's operating principle is to perform only works written within the last 10 years.

Despite this, the basic operating principles of a microscope are quite simple.

That has always been an operating principle of most advertisers who plug products on television.

This is pretty much the essential operating principle of installation art.

This at any rate seemed to be Frank's operating principle.

The operating principle here is to attract him to the area.

On the other front, they are devising the broad operating principles for the Internet.

I had hoped to find a more definite operating principle.

The new operating principles are so vague that even an article about a failing football team could get cut.