1. A method for providing geographic item information for a location, using universal location referencing objects, comprising the steps of: accessing a file-of-reference that comprises geographic item information, including a geographic item associated with a location; accessing a third-party file that comprises additional geographic item information that is optionally associated with the location; and in response to a request for information for a particular location, retrieving a universal location reference object for the particular location, wherein the universal location reference object includes (a) a universal location reference code that uniquely identifies the location, (b) identifying information for the location, and (c) links to the additional geographic item information in the third-party file; traversing the links, and associating the additional geographic item information in the third-party file with the geographic item information in the file-of-reference, and providing resultant information, including additional geographic item information about the particular location, as a response to the request.