�1���� Scope
�2����
References
�3����
Abbreviations
�4����
General provisions
������� 4.1���� General
������� 4.2���� Basic requirements
������� 4.3���� Standardized options
�5����
Network requirements
�6����
Procedures for the transmission of documents
�7����
Coding scheme
�8����
Operation
�9����
Terminal identification
10���� User terminals
11���� Directories