SCTE 43 2015, "Digital Video Systems Characteristics Standard for Cable Television," contains the constraints and extensions for the use of MPEG-2 video coding in cable TV systems.
SCTE 224 2015, "Event Scheduling and Notification Interface," defines the Event Scheduling and Notification Interface (ESNI), which is a web interface facilitating the transmission of event and policy information. ESNI provides a functional method for providers to communicate upcoming schedule or signal-based events and corresponding policy to distributors. This interface allows existing content distribution controls traditionally performed via manual control in IRDs by providers to be replaced with a programmatic interface (this standard). ESNI policy enables control of content distributed to audiences based on attributes of that audience including (but not limited to) geographic location and device type.
Both standards are available at http://www.scte.org/SCTE/Standards/Download/SCTE/Standards/Download_SCTE_Standards.aspx.