Building MPEG-DASH is an industrywide effort; while the MPEG group defines the core features of MPEG-DASH and its reference profiles, other standardization bodies are supplementing the core specification with additional recommendations and extended profiles in order to allow deployments in a specific context. For example, the DASH Industry Forum (IF), which consists of more than 80 companies from the ecosystem, proposes Interoperability Points (IOPs) covering over-the-top use cases; 3GPP and ETSI cover the use of MPEG-DASH in the mobile LTE Broadcast context; and DVB, EBU, and HbbTV cover the use of DASH in the digital and interactive TV contexts.