Information space
Information space is the set of concepts and relations among them held by an information system; it describes the range of possible values or meanings an entity can have under the given rules and circumstances.
Another definition (idealistic) is that the information space are the total results of the semantic activity of the humanity, "the world of names and titles", conjugated to the ontological world. Being a primary concept, the information space cannot be precisely defined and is set as a dialectical opposition to the material, physical, object space.