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An advanced app-store concept, called ThingStore, is introduced in this paper. It provides a "market place" environment to facilitate collaboration on Internet-of-Things (IoT) applications development, and a platform to host their deployment. ThingStore services three categories of users: (1) Thing Provider - "Things" (such as online cameras and sensors) can be made more intelligent through event detection software routines called smart services. A thing provider may deploy "things" and advertise their smart services at ThingStore market place. (2) Software Developer - Software developers can develop apps that query relevant smart services using EQL (Event Query Language) much like the way traditional database applications are conveniently developed atop a standard database management system today. (3) End User - An end user may subscribe to a particular app for event notification and management. In …