11. The apparatus of claim 10 , wherein said broker is configured: to search for a data element in the operational memory of the repository such that a data element is considered to match with the search term when a difference or a distance between the data element in the operational memory of the repository and the search term is smaller than a predetermined limit, and to control sending of the subsequent message to the second broker according to a result of said searching.
12. The apparatus of claim 11 , wherein said broker is configured to change a merit value when a matching data element is found.