1. A geographic database construction for representing navigable road segments located in a geographic region, comprising: data entities of a first type; and data entities of a second type, wherein each navigable road segment is represented by at least one separate data entity of said first type, wherein each data entity of said first type contains navigable attributes of the road segment represented thereby, and further wherein each name by which a road segment represented by a data entity of said first type is represented by a data entity of said second type, and wherein said data entities of said first type are located together in the geographic database separate from the data entities of said second type, and further wherein each data entity of said first type include a reference to that data entity of said second type that contains the name by which the road segment represented by the data entity of said first type is known.