DELTA ontology Alba Fernández Izquierdo This ontology represents the terms to allow interoperability in DELTA project. It models concepts related to enery market, smart grids and demand-response platforms, and it will reuse standard ontologies whenever possible. 0.0.4 activates belongs to estimates has aggregated property has cluster has currency has duration has incentive has price has profile has reward is allocated in manage owns send bids uses capacity sold has beginning has end has timestamp state of charge type Legal entities that aggregate the load or generation of various demand and/or generation/production units and aim at optimizing energy supply and consumption. Aggregator Bid that is estimated by the aggregator Bid Entity that consumes energy Consumer Customer Entity that interacts in the platform Device that is located in a specific place Device A property related to measurements that are characterized by a value measured in energy units Energy Energy market Flexibility is a property that indicates the ability to increase or reduce the production of power plants or the consumption of demand processes Flexibility Bid related to energy flexibility Flexibility bid A property related to measurements that are characterized by a value measured in generation units. It represents the energy produced. Generation Incentive (usually monetary) associated to energy values Incentive A property related to measurements that are characterized by a value measured in energy units. It represents the load needed for a device to init Load A property related to measurements that are characterized by a value measured in power units Power Bid related to price Price bid Price bid for ancillary services Price bid AS Bid price for the next day Price bid day ahead Price bid for the day Price bid intra-day A specification associated to a DVN or a device to collect information about properties Profile Profit Property Entity that consumes or produces energy Prosumer Reward associated to the customers that is given after using the engagement tools Reward Interval of time that indicates the active time of a bid or profile Time interval An aggregated, virtual cluster of prosumers which will be perceived and acted upon as a single, large prosumer entity by the Aggregator. Prosumers entailed into each Virtual Node will have common characteristics, defined by their corresponding Aggregator. Virtual node A tangible object designed to accomplish a particular task in households, common public buildings or offices. In order to accomplish this task, the device performs one or more functions. For example, a washing machine is designed to wash (task) and to accomplish this task it performs a start and stop function. Devices can be structured in categories (subclasses) that reflect the different domain in which a device is used, e.g., smart appliances domain (subclass FunctionRelated) vs. building domain (subclass BuildingRelated) vs. smart grid domain (subclass EnergyRelated). New categories can be defined,if needed, to reflect other differences, for example different points of view, such as the point of view of the device's user vs. the point of view of the device's manufacturer. We propose a list of devices that are relevant for the purpose of SAREF, but this list can be extended. Device