�1���� Definition
�2����
Description of the service
������� 2.1���� General description
������� 2.2���� Specific terminology
������� 2.3���� Applications
�3����
Procedures
�4����
Network aspects
�5����
Charging considerations
�6����
Terminals
�7����
Quality of Service
�8����
Interoperability
������� 8.1���� Interoperability with other telematic services
������� 8.2���� Interoperability between videotex systems