function-specific referencing tables provide a means for attaching function-specific data to a map-data base produced by any participating supplier. such a table is collaboratively produced to support a specific function or class of functions involving location-based service, active-safety or advanced driver assistance. it will generally consist of a list of map elements of a specific type (e.g., links, intersections, point-of-interest locations, etc.) along with identifying attributes (e.g., street names, longitude/latitude coordinates, etc.). additionally, each entry in the table is assigned a unique identifier. the set of entries in a table are generally selected, through consensus of all interested parties. as a practical matter the result will represent a small subset of the elements of the given type that are available in the map databases and will consist of those that are more important to the application area. after a table is formulated, it is the task of each participating supplier to determine and cross-reference the elements in their map-database that correspond to the table entries.