Adhoc group N12617 AHG on User Descriptions looks into user description in order to broaden the participation and focus of this challenge. Especially for social networks, this will be a relevant activity. An ontology and schemas need to be standardized. Relevant information for user description is attributes, activities, interests, status, history, etc. Draft use cases like Scalable User Description, User-Customized Contents and User’s Emotions are available in N12618 Draft Use Cases for MPEG User Description.