1 INTRODUCTION  
2 DEFINITION, NATURE, ASSOCIATED CHALLENGES, KEY PLAYERS  
2.1 Definition  
2.2 Nature/Characteristics  
2.3 Information Exchange Process  
2.4 Key Players  
2.5 Challenges  
2.6 Requirements/Goals  
3 OVERVIEW OF METHODS  
4 CONTENT-BASED IDENTIFICATION  
5 FEEDBACK-BASED IDENTIFICATION  
6 INTERVENTION-BASED SOLUTIONS  
7 EXISTING DATASETS  
8 CONCLUSION AND FUTURE WORK