1. A method comprising: receiving a query to inject a first information space into a second information space; determining whether the first information space and the second information space exist; determining whether the first information space is on a list of information spaces projected from the second information space, if the first and the second information spaces exist; applying a filtering function on information content of the first information space and any other information spaces projected from the first information space, if the first information space is on the list of information spaces projected from the second information space; and adding the filtered information content to the information content of the second information space.