FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 Trigger message
4.1 General
4.1.1 Viewer interaction
4.1.2 Priority ratings
4.1.3 Character coding
4.1.4 Future compatibility
4.2 Life cycles
4.2.1 Trigger message and event message life cycle
4.2.2 Event message preparation life cycle
4.2.3 Application life cycle
4.3 Syntax of trigger message
4.3.1 General
4.3.2 Trigger text length
4.3.3 Syntax of trigger text
4.3.4 Trigger repetition
Annex A (informative) Recommendations
Annex B (informative) Code of practice
Bibliography