18. An interface system according to claim 15 , wherein the one or more data dictionaries comprises two or more data dictionaries, wherein the data processor is configured to maintain lookup chains between the two or more data dictionaries such that a given data string in a first data dictionary is mapped to at least one data string in one or more other data dictionaries of the two or more data dictionaries for selection by the user.
18. An interface system according to claim 15 , wherein the one or more data dictionaries comprises two or more data dictionaries, wherein the data processor is configured to maintain lookup chains between the two or more data dictionaries such that a given data string in a first data dictionary is mapped to at least one data string in one or more other data dictionaries of the two or more data dictionaries for selection by the user. 20. An interface system according to claim 18 , wherein the mapping is performed dynamically.