User's database in networks and method of constructing the same

A method of constructing a database for network users, comprising the following steps:

• (a) checking from a main storage layer whether the main storage layer has a basic code identical to the first bit of the user's address data;
• if not, placing said basic code in the corresponding field of a plurality of fields of said main storage layer;
• placing a main connection line and a sub-storage layer connected thereto;
• and if present, following said main connection line of the field to the sub-storage layer connected thereto;
• (b) checking whether said sub-storage layer stores the next basic code of the user's address data;
• if not, placing said basic code in the corresponding field of the plurality of fields of the sub-storage layer;
• at the corresponding field, producing a sub-connection line and a sub-storage layer connected thereto;
• if present, then following said sub-connection line to which the fields is connected, to said sub-storage layer;
• (c) repeating step (b) until all basic codes of the user's address data are stored in the database;
• (d) according to the field of the last basic code of the user's address data, producing a user's address connection line connected to the user's address field and storing said user's address data in the user's address field;
• by means of the above procedure, a complete database for network users being established;
• and in retrieval of the user's address data, starting from said main storage layer along said main connection lines and sub-connection lines to the last sub-storage layer, a user's address being retrieved via the connection line.