Every space has a specific structure, which means that its content is arranged in a certain manner. This arrangement may be traced back to some underlying program, or it may be regarded itself as kind of program, a rule, a pattern observable all-around in that space, in all that is happening there.

The structure is all that matters; the program is just a possible description of this phenomenon. A description laying particularly stress on activity. As well as establishing a relationship to knowledge.

“Structure” is often preferable because it does not implicate anything like some foreign creator or so. It says nothing about its origin. But if using this term we should nevertheless keep in mind the other implications of “program”, activity and knowledge. They are essential.