1. A method for structuring a directory to provide a telecommunications service with numbering plan-independent access without search to a directory entry using a unique identifier comprising an alphanumeric sequence associated with the entry, comprising the steps of: defining a sub-tree in the directory, the sub-tree having a structure in which each character of the unique identifier comprises a separate node in the sub-tree; and each leaf node in the sub-tree stores information about an object that is useful for providing the telecommunications service or said leaf node is assigned an alias which points to information about the object stored somewhere else in a database which stores the entry or points to a different database.