{
    "$schema": "http://json-schema.org/schema#",
    "$schemaVersion": "0.0.1",
    "modelTags": "SAREF Valve",
    "$id": "https://smart-data-models.github.com/dataModel.SAREF4BLDG/Valve/schema.json",
    "derivedFrom": "https://saref.etsi.org/saref4bldg/v1.1.2/#s4bldg:Valve",
    "title": "Smart data models - Valve schema",
    "type": "object",
    "license": "https://opensource.org/licenses/BSD-3-Clause",
    "description": "A valve is used in a building services piping distribution system to control or modulate the flow of the fluid.",
    "allOf": [
        {
            "$ref": "https://smart-data-models.github.io/data-models/common-schema.json#/definitions/GSMA-Commons"
        },
        {
            "$ref": "https://smart-data-models.github.io/data-models/common-schema.json#/definitions/Location-Commons"
        },
        {
            "properties": {
                "type": {
                    "type": "string",
                    "description": "Property. It must be equal to `Valve`",
                    "enum": [
                        "Valve"
                    ]
                },
                "closeOffRating": {
                    "$ref": "https://raw.githubusercontent.com/smart-data-models/dataModel.S4BLDG/master/S4BLDG-schema.json#/definitions/Measurement",
                    "description": "Property. Close off rating. Usually measured in Pascals (Pa, N/m2)"
                },
                "flowCoefficient": {
                    "$ref": "https://raw.githubusercontent.com/smart-data-models/dataModel.S4BLDG/master/S4BLDG-schema.json#/definitions/Measurement",
                    "description": "Property. Flow coefficient (the quantity of fluid that passes through a fully open valve at unit pressure drop), typically expressed as the Kv or Cv value for the valve"
                },
                "size": {
                    "$ref": "https://raw.githubusercontent.com/smart-data-models/dataModel.S4BLDG/master/S4BLDG-schema.json#/definitions/Measurement",
                    "description": "Property. The size of the connection to the valve (or to each connection for faucets, mixing valves, etc.). Usually measured in millimeters (mm)"
                },
                "testPressure": {
                    "$ref": "https://raw.githubusercontent.com/smart-data-models/dataModel.S4BLDG/master/S4BLDG-schema.json#/definitions/Measurement",
                    "description": "Property. The maximum pressure to which the valve has been subjected under test. Usually measured in Pascals (Pa, N/m2)"
                },
                "valveMechanism": {
                    "type": "string",
                    "description": "Property. The mechanism by which the valve function is achieved where: BALL: Valve that has a ported ball that can be turned relative to the body seat ports. BUTTERFLY: Valve in which a streamlined disc pivots about a diametric axis. CONFIGUREDGATE: Screwdown valve in which the closing gate is shaped in a configured manner to have a more precise control of pressure and flow change across the valve. GLAND: Valve with a tapered seating, in which a rotatable plug is retained by means of a gland and gland packing. GLOBE: Screwdown valve that has a spherical body. LUBRICATEDPLUG: Plug valve in which a lubricant is injected under pressure between the plug face and the body. NEEDLE: Valve for regulating the flow in or from a pipe, in which a slender cone moves along the axis of flow to close against a fixed conical seat. PARALLELSLIDE: Screwdown valve that has a machined plate that slides in formed grooves to form a seal. PLUG: Valve that has a ported plug that can be turned relative to the body seat ports. WEDGEGATE: Screwdown valve that has a wedge shaped plate fitting into tapered guides to form a seal"
                },
                "valveOperation": {
                    "type": "string",
                    "description": "Property. The method of valve operation where: DROPWEIGHT: A valve that is closed by the action of a weighted lever being released, the weight normally being prevented from dropping by being held by a wire, the closure normally being made by the action of heat on a fusible link in the wire FLOAT: A valve that is opened and closed by the action of a float that rises and falls with water level. The float may be a ball attached to a lever or other mechanism HYDRAULIC: A valve that is opened and closed by hydraulic actuation LEVER: A valve that is opened and closed by the action of a lever rotating the gate within the valve. LOCKSHIELD: A valve that requires the use of a special lockshield key for opening and closing, the operating mechanism being protected by a shroud during normal operation. MOTORIZED: A valve that is opened and closed by the action of an electric motor on an actuator PNEUMATIC: A valve that is opened and closed by pneumatic actuation SOLENOID: A valve that is normally held open by a magnetic field in a coil acting on the gate but that is closed immediately if the electrical current generating the magnetic field is removed. SPRING: A valve that is normally held in position by the pressure of a spring on a plate but that may be caused to open if the pressure of the fluid is sufficient to overcome the spring pressure. THERMOSTATIC: A valve in which the ports are opened or closed to maintain a required predetermined temperature. WHEEL: A valve that is opened and closed by the action of a wheel moving the gate within the valve"
                },
                "valvePattern": {
                    "type": "string",
                    "description": "Property. The configuration of the ports of a valve according to either the linear route taken by a fluid flowing through the valve or by the number of ports where: SINGLEPORT: Valve that has a single entry port from the system that it serves, the exit port being to the surrounding environment. ANGLED_2_PORT: Valve in which the direction of flow is changed through 90 degrees. STRAIGHT_2_PORT: Valve in which the flow is straight through. STRAIGHT_3_PORT: Valve with three separate ports. CROSSOVER_4_PORT: Valve with 4 separate ports"
                },
                "workingPressure": {
                    "$ref": "https://raw.githubusercontent.com/smart-data-models/dataModel.S4BLDG/master/S4BLDG-schema.json#/definitions/Measurement",
                    "description": "Property. The normally expected maximum working pressure of the valve. Usually measured in Pascals (Pa, N/m2)"
                },
                "isContainedInBuildingSpace": {
                    "$ref": "https://smart-data-models.github.io/data-models/common-schema.json#/definitions/EntityIdentifierType",
                    "description": "Relationship. An entity used to define the physical spaces of the building. A building space contains devices or building objects. (BuildingSpace)"
                },
                "isContainedInPhysicalObject": {
                    "$ref": "https://smart-data-models.github.io/data-models/common-schema.json#/definitions/EntityIdentifierType",
                    "description": "Relationship. Any Object that has a proper space region.  (Definition extracted from DUL ontology) (PhysicalObject)"
                },
                "isSubSystemOf": {
                    "type": "array",
                    "description": "Relationship. A reference to a system(s) that this Physical Object is part of",
                    "items": {
                        "$ref": "https://smart-data-models.github.io/data-models/common-schema.json#/definitions/EntityIdentifierType",
                        "description": "Relationship. The class of systems, i.e., systems virtually isolated from the environment, whose behaviour and interactions with the environment are modeled. Systems can be connected to other systems. Connected systems interact in some ways. Systems can also have subsystems. Properties of subsystems somehow contribute to the properties of the supersystem. (System)"
                    }
                },
                "hasManufacturer": {
                    "type": "string",
                    "description": "Property. A relationship identifying the manufacturer of an entity (e.g., device). The value is expected to be a string or a string with language tag"
                },
                "hasModel": {
                    "type": "string",
                    "description": "Property. A relationship identifying the model of an entity (e.g., device). The value is expected to be a string or a string with language tag"
                }
            }
        }
    ],
    "required": [
        "id",
        "type"
    ]
}