Bring Your Own Calendar: A CalDAV-Based Virtual Calendar System

Today, the sharing of schedule information across individuals or organizations has been made simpler by the Internet and personal devices such as smartphones. However, it is not as easy in bring-your-own-device environments due to problems related to privacy and cultural gaps among organizations and individuals. Current calendar systems do not have any easy, fine-grained calendar sharing scheme to support such environments. In this paper, we propose a new calendar system that employs a fine-grained calendar sharing scheme called Virtual Calendar, which is based on our CalDAV proxy engine. Our calendar system satisfies such fine-grained demands as ``I want to share my calendar with my wife for only those articles that start after 5 pm or on weekends.''