abstract engineering = open Merge, Mid_level_ontology in {




--  A PureTwopole that accumulates across variable.
fun AcrossVariableAccumulator : Class ;
fun AcrossVariableAccumulator_Class : SubClass AcrossVariableAccumulator PureTwopole ;

-- A Source that models a generator of across variable.
fun AcrossVariableSource : Class ;
fun AcrossVariableSource_Class : SubClass AcrossVariableSource Source ;

-- algebraic equation or set of equations
fun AlgebraicAttribute : Ind EquationAttribute ;


-- An Equation that is not
-- a DifferentialEquation
fun AlgebraicEquation : Class ;
fun AlgebraicEquation_Class : SubClass AlgebraicEquation Equation ;

-- Set of both differential and algebraic equations
fun AlgebroDifferentialAttribute : Ind InternalAttribute ;


-- Electronic equipment that increases strength of
-- signals passing through it, it can be modeled using a controlled
-- source, or an operational amplifier.
fun Amplifier : Class ;
fun Amplifier_Class : SubClass Amplifier ElectricalCircuit ;

-- PhysicalDimension of angular velocity, [s^_1].
fun AngularVelocity : Ind PhysicalDimension ;


-- set of application domains (medicine, physics, etc)
fun ApplicationDomain : Class ;
fun ApplicationDomain_Class : SubClass ApplicationDomain InternalAttribute ;

-- article
fun ArticleCategory : Ind DocumentCategory ;


-- astronomy
fun AstronomyDomain : Class ;
fun AstronomyDomain_Class : SubClass AstronomyDomain PhysicsDomain ;

-- For given class and for given attribute, return
-- a subclass of the class of object having the attribute
fun AttrFn : Class -> El Attribute -> Class ;


-- autonomous
fun Autonomous : Class ;
fun Autonomous_Class : SubClass Autonomous InternalAttribute ;

-- With no backlash.
fun Backlashless : Class ;
fun Backlashless_Class : SubClass Backlashless InternalAttribute ;

-- the part of a transistor that separates the emitter 
-- from the collector
fun Base : Class ;
fun Base_Class : SubClass Base Terminal ;

fun Battery_DCPowerSource : SubClass Battery DCPowerSource ;

-- Bessel's equation
fun BesselsEquation : Class ;
fun BesselsEquation_Class : SubClass BesselsEquation (both NonlinearEquation OrdinaryDifferentialEquation) ;


-- Bipolar transistor
fun BjtTransistor : Class ;
fun BjtTransistor_Class : SubClass BjtTransistor Transistor ;

-- A SinglePhaseRectifier of
-- that exploits both polarities of the input power source.
fun BridgeSinglePhaseRectifier : Class ;
fun BridgeSinglePhaseRectifier_Class : SubClass BridgeSinglePhaseRectifier SinglePhaseRectifier ;

-- With no brushes (of electrical motors)
fun Brushless : Class ;
fun Brushless_Class : SubClass Brushless InternalAttribute ;

-- An ElectricalComponent characterized by its
-- capacitance.
fun Capacitor : Class ;
fun Capacitor_Class : SubClass Capacitor ElectricalComponent ;

-- An AcrossVariableAccumulator from electrical energy domain.
fun CapacitorElement : Class ;
fun CapacitorElement_Class : SubClass CapacitorElement ElectricDevice ;

-- 4_wheeled motor vehicle, usually propelled by
-- an internal combustion engine
fun Car : Class ;
fun Car_Class : SubClass Car Vehicle ;

-- circuit theory
fun CircuitTheoryDomain : Class ;
fun CircuitTheoryDomain_Class : SubClass CircuitTheoryDomain (both ElectricalEngineeringDomain PhysicsDomain) ;


-- the electrode in a transistor through which a 
-- primary flow of carriers leaves the inter_electrode region
fun Collector : Class ;
fun Collector_Class : SubClass Collector Terminal ;

-- The ability of material to stretch or bend.
fun Compliance : Ind PhysicalAttribute ;


-- A collection of bytes stored as an 
-- individual entity. All data on disk is stored as a file with an 
-- assigned file name that is unique within the folder (directory) 
-- it resides in. ComputerFile file systems contain only files and folders
fun ComputerFile : Class ;
fun ComputerFile_Class : SubClass ComputerFile ContentBearingObject ;

fun ComputerProgram_ITAgent : SubClass ComputerProgram ITAgent ;

-- the ability of a material to lead current
fun Conductivity : Ind PhysicalAttribute ;


-- A Substance that readily conducts
-- electricity.
fun ConductorSubstance : Class ;
fun ConductorSubstance_Class : SubClass ConductorSubstance Substance ;

-- A class of control design method
fun ControlDesignMethod : Class ;
fun ControlDesignMethod_Class : SubClass ControlDesignMethod Method ;

-- control
fun ControlDomain : Class ;
fun ControlDomain_Class : SubClass ControlDomain EngineeringDomain ;

-- a mechanism that controls the operation of some
-- device
fun Controller : Class ;
fun Controller_Class : SubClass Controller UnknownDomainDevice ;

-- PhysicalDimension of electrical current, [A].
fun Current : Ind PhysicalDimension ;


-- A direct_current PowerSource.
fun DCPowerSource : Class ;
fun DCPowerSource_Class : SubClass DCPowerSource PowerSource ;

-- A Dissipator from translatory energy domain.
fun DamperElement : Class ;
fun DamperElement_Class : SubClass DamperElement (both Dissipator TranslatoryTwopole) ;


-- A direct_current electrical motor.
fun DcMotor : Class ;
fun DcMotor_Class : SubClass DcMotor ElectricalMotor ;

-- differential equation or set of equations
fun DifferentialAttribute : Ind EquationAttribute ;


-- An Equation containing differentials
-- of a function
fun DifferentialEquation : Class ;
fun DifferentialEquation_Class : SubClass DifferentialEquation Equation ;

-- Dimensionless PhysicalDimension.
fun Dimensionless : Ind PhysicalDimension ;


-- A semiconductor device that consists of a p_n
-- junction, it is used e.g. in rectifiers or demodulators.
fun Diode : Class ;
fun Diode_Class : SubClass Diode SemiconductorComponent ;

-- Valve that controls the direction
-- of flow of a fluid
fun DirectionalControlValve : Class ;
fun DirectionalControlValve_Class : SubClass DirectionalControlValve Valve ;

-- A method of converting continuous problem
-- to a discrete one, loaded by some discretization error.
fun Discretization : Class ;
fun Discretization_Class : SubClass Discretization MathematicalMethod ;

-- A PureTwopole that models a dissipation of energy.
fun Dissipator : Class ;
fun Dissipator_Class : SubClass Dissipator PureTwopole ;

-- document category
fun DocumentCategory : Class ;
fun DocumentCategory_Class : SubClass DocumentCategory WebDocumentAttribute ;

-- A SinglePhaseRectifier of
-- that exploits both polarities of the input power source.
fun DoublerSinglePhaseRectifier : Class ;
fun DoublerSinglePhaseRectifier_Class : SubClass DoublerSinglePhaseRectifier SinglePhaseRectifier ;

-- Asserts that the constitutive relation of
-- a multipole does depend on time.
fun DynamicMultipole : Ind MultipoleAttribute ;


-- Electrical energetic interaction
fun Electrical : Ind PhysicalDomain ;


-- A complex ElectricDevice consisting
-- of several mutually interconnected electrical components.
fun ElectricalCircuit : Class ;
fun ElectricalCircuit_Class : SubClass ElectricalCircuit ElectricDevice ;

-- A discrete ElectricDevice for
-- general usage, such as resistors, capacitors, diodes, transistors etc.
fun ElectricalComponent : Class ;
fun ElectricalComponent_Class : SubClass ElectricalComponent ElectricDevice ;

-- An ElectricalComponent designed to
-- transmit electricity
fun ElectricalConductor : Class ;
fun ElectricalConductor_Class : SubClass ElectricalConductor ElectricalComponent ;

-- electrical drives (motors)
fun ElectricalDrivesDomain : Class ;
fun ElectricalDrivesDomain_Class : SubClass ElectricalDrivesDomain ElectroMechanicalDevicesDomain ;

-- domain involving electrical engineering
fun ElectricalEngineeringDomain : Class ;
fun ElectricalEngineeringDomain_Class : SubClass ElectricalEngineeringDomain EngineeringDomain ;

-- A Method used in electrical
-- engineering for designing and constructing electrical devices.
fun ElectricalEngineeringMethod : Class ;
fun ElectricalEngineeringMethod_Class : SubClass ElectricalEngineeringMethod Method ;

-- An electrical motor.
fun ElectricalMotor : Class ;
fun ElectricalMotor_Class : SubClass ElectricalMotor (both ElectricDevice Motor) ;


-- A MultipoleModel containing only
-- electrical multipoles.
fun ElectricalMultipoleModel : Class ;
fun ElectricalMultipoleModel_Class : SubClass ElectricalMultipoleModel MultipoleModel ;

-- A Process in which electrical
-- interactions take place
fun ElectricalProcess : Class ;
fun ElectricalProcess_Class : SubClass ElectricalProcess NaturalProcess ;

-- a resonance of electrical energy.
fun ElectricalResonance : Class ;
fun ElectricalResonance_Class : SubClass ElectricalResonance (both ElectricalProcess Resonance) ;


-- A PureTwopole from electrical energy domain.
fun ElectricalTwopole : Class ;
fun ElectricalTwopole_Class : SubClass ElectricalTwopole PureTwopole ;

-- electrical drives (motors)
fun ElectroMechanicalDevicesDomain : Class ;
fun ElectroMechanicalDevicesDomain_Class : SubClass ElectroMechanicalDevicesDomain (both ElectricalEngineeringDomain MechanicalEngineeringDomain) ;


-- electronic circuits _ electrical circuits 
-- containing complex semiconductor components
fun ElectronicsDomain : Class ;
fun ElectronicsDomain_Class : SubClass ElectronicsDomain ElectricalEngineeringDomain ;

-- the electrode in a transistor where electrons originate
fun Emitter : Class ;
fun Emitter_Class : SubClass Emitter Terminal ;

-- engineering (mechanical, electrical)
fun EngineeringDomain : Class ;
fun EngineeringDomain_Class : SubClass EngineeringDomain ScienceDomain ;

-- a process of designing, manufacturing and
-- operating of an engineering system involving all stages of the life cycle.
fun EngineersProcess : Class ;
fun EngineersProcess_Class : SubClass EngineersProcess EngineersSubprocess ;

-- a class of subprocesses that are needed to
-- design and operate an engineering system
fun EngineersSubprocess : Class ;
fun EngineersSubprocess_Class : SubClass EngineersSubprocess IntentionalProcess ;

-- a mathematical statement that two expressions are
-- equal.
fun Equation : Class ;
fun Equation_Class : SubClass Equation Proposition ;

-- an attribute that applies to an equation
-- or to a set of equations
fun EquationAttribute : Class ;
fun EquationAttribute_Class : SubClass EquationAttribute InternalAttribute ;

-- Field_effect transistor.
fun FetTransistor : Class ;
fun FetTransistor_Class : SubClass FetTransistor Transistor ;

-- file system
fun FileSystem : Class ;
fun FileSystem_Class : SubClass FileSystem Group ;

-- A DifferentialEquation
-- where variables are differentiated only once.
fun FirstOrderDifferentialEquation : Class ;
fun FirstOrderDifferentialEquation_Class : SubClass FirstOrderDifferentialEquation DifferentialEquation ;

-- A FluidPowerDevice designed to transform
-- fluid_power energy into mechanical translatory energy.
fun FluidCylinder : Class ;
fun FluidCylinder_Class : SubClass FluidCylinder (both FluidPowerDevice MechanicalDevice) ;


-- Fluid power energetic interaction
fun FluidPower : Ind PhysicalDomain ;


-- An EngineeringComponent in function of
-- which play role fluid_power energetical interactions.
fun FluidPowerDevice : Class ;
fun FluidPowerDevice_Class : SubClass FluidPowerDevice EngineeringComponent ;

-- fluid power (hydraulic) systems
fun FluidPowerDomain : Class ;
fun FluidPowerDomain_Class : SubClass FluidPowerDomain MechanicalEngineeringDomain ;

-- PhysicalDimension of force, [N].
fun Force : Ind PhysicalDimension ;


-- Computing a Fourier series for given
-- periodic function
fun FourierAnalysis : Class ;
fun FourierAnalysis_Class : SubClass FourierAnalysis MathematicalMethod ;

-- Reconstruction of a periodic function
-- from its Fourier series representation.
fun FourierSynthesis : Class ;
fun FourierSynthesis_Class : SubClass FourierSynthesis MathematicalMethod ;

-- A Multipole with exactly four poles.
fun Fourpole : Class ;
fun Fourpole_Class : SubClass Fourpole Multipole ;

-- Alters the frequency spectrum of signals
-- passing through it
fun FrequencyFilter : Class ;
fun FrequencyFilter_Class : SubClass FrequencyFilter ElectricalCircuit ;

-- A MechanicalProcess in which mechanical
-- energy is converted into a heat
fun Friction : Class ;
fun Friction_Class : SubClass Friction MechanicalProcess ;

-- a toothed wheel that engages another toothed
-- mechanism in order to change the speed or direction of transmitted motion.
fun Gear : Class ;
fun Gear_Class : SubClass Gear MechanicalDevice ;

-- a pair of gears that are used to change speed or
-- direction of an angular motion, ideal gear train can be modeled using
-- a transformer.
fun GearTrain : Class ;
fun GearTrain_Class : SubClass GearTrain MechanicalDevice ;

-- A device composed of several gear_trains used
-- to change speed and torque of transmitted motion.
fun Gearbox : Class ;
fun Gearbox_Class : SubClass Gearbox MechanicalDevice ;

-- A Transducer for which the ratio of
-- across variable on one side and through variable on the
-- other side is equal to the ratio of the remaining two variables.
fun Gyrator : Class ;
fun Gyrator_Class : SubClass Gyrator Transducer ;

-- A SinglePhaseRectifier of
-- that exploits only one polarity of the input power source.
fun HalfWaveSinglePhaseRectifier : Class ;
fun HalfWaveSinglePhaseRectifier_Class : SubClass HalfWaveSinglePhaseRectifier SinglePhaseRectifier ;

-- A DifferentialEquation
-- where variables are differentiated more than once.
fun HigherOrderDifferentialEquation : Class ;
fun HigherOrderDifferentialEquation_Class : SubClass HigherOrderDifferentialEquation DifferentialEquation ;

fun Human_ITAgent : SubClass Human ITAgent ;

-- agent capable of performing ITProcess
fun ITAgent : Class ;
fun ITAgent_Class : SubClass ITAgent Agent ;

-- A process performed on a computer by a human
-- operator.
fun ITProcess : Class ;
fun ITProcess_Class : SubClass ITProcess IntentionalProcess ;

-- A Fourpole modeling an
-- OperationalAmplifier with ideal properties.
fun IdealOperationalAmplifier : Class ;
fun IdealOperationalAmplifier_Class : SubClass IdealOperationalAmplifier Fourpole ;

-- A PureTwopole that models an ideal switch.
fun IdealSwitch : Class ;
fun IdealSwitch_Class : SubClass IdealSwitch PureTwopole ;

-- A PureTwopole that is linear.
fun IdealTwopole : Class ;
fun IdealTwopole_Class : SubClass IdealTwopole PureTwopole ;

-- Asserts that a constitutive relation
-- of a multipole does not refer to other variables than terminal or
-- inner.
fun IndependentMultipole : Ind MultipoleAttribute ;


-- A property of an electric circuit by which an
-- electromotive force is induced in it by a variation of current.
fun Inductance : Class ; --  subattribute PhysicalAttribute


-- An electrical motor powered by a
-- three_phase power suply.
fun InductionMotor : Class ;
fun InductionMotor_Class : SubClass InductionMotor ElectricalMotor ;

-- An ElectricalComponent that introduces inductance
-- into a circuit.
fun Inductor : Class ;
fun Inductor_Class : SubClass Inductor ElectricalComponent ;

-- A ThroughVariableAccumulator from electrical energy domain.
fun InductorElement : Class ;
fun InductorElement_Class : SubClass InductorElement ElectricDevice ;

-- An AcrossVariableAccumulator from translatory energy domain.
fun Inertor : Class ;
fun Inertor_Class : SubClass Inertor (both AcrossVariableAccumulator TranslatoryTwopole) ;


-- The process of deploying an application
-- on a computer.
fun Installation : Class ;
fun Installation_Class : SubClass Installation ITProcess ;

-- a Substance such as glass or
-- porcelain with negligible electrical conductivity.
fun InsulatorSubstance : Class ;
fun InsulatorSubstance_Class : SubClass InsulatorSubstance Substance ;

-- An Amplifier that changes the polarity 
-- of the input signal.
fun InvertingAmplifier : Class ;
fun InvertingAmplifier_Class : SubClass InvertingAmplifier Amplifier ;

-- Junction field_effect transistor.
fun JfetTransistor : Class ;
fun JfetTransistor_Class : SubClass JfetTransistor FetTransistor ;

-- light emitted at a p_n junction is proportional 
-- to the bias current, color depends on the material used
fun LED : Class ;
fun LED_Class : SubClass LED Diode ;

-- PhysicalDimension of length, [m].
fun Length : Ind PhysicalDimension ;


-- adjective
fun LexAdjective : Ind LexiconCategory ;


-- adverb
fun LexAdverb : Ind LexiconCategory ;


-- noun
fun LexNoun : Ind LexiconCategory ;


-- verb
fun LexVerb : Ind LexiconCategory ;


-- WordNet category: noun, verb, adjective or adverb
fun LexiconCategory : Class ;
fun LexiconCategory_Class : SubClass LexiconCategory InternalAttribute ;

-- library model
fun LibraryModelCategory : Ind DocumentCategory ;


-- A polynomial Equation of the first degree.
fun LinearEquation : Class ;
fun LinearEquation_Class : SubClass LinearEquation Equation ;

-- Asserts that the constitutive relation of
-- a multipole is linear.
fun LinearMultipole : Ind MultipoleAttribute ;


-- A Method that involves using
-- mathematical aparatus.
fun MathematicalMethod : Class ;
fun MathematicalMethod_Class : SubClass MathematicalMethod Method ;

-- A model that uses the mathematical
-- aparatus
fun MathematicalModel : Class ;
fun MathematicalModel_Class : SubClass MathematicalModel Model ;

-- A model of a Pendulum consisting
-- of a mass hanged on a stiff string.
fun MathematicalPendulum : Class ;
fun MathematicalPendulum_Class : SubClass MathematicalPendulum MathematicalModel ;

-- mathematics
fun MathematicsDomain : Class ;
fun MathematicsDomain_Class : SubClass MathematicsDomain NaturalSciencesDomain ;

-- An EngineeringComponent in function of
-- which play role mechanical energetical interactions.
fun MechanicalDevice : Class ;
fun MechanicalDevice_Class : SubClass MechanicalDevice EngineeringComponent ;

-- domain involving mechanical engineering
fun MechanicalEngineeringDomain : Class ;
fun MechanicalEngineeringDomain_Class : SubClass MechanicalEngineeringDomain EngineeringDomain ;

-- A Process in which mechanical
-- interactions take place
fun MechanicalProcess : Class ;
fun MechanicalProcess_Class : SubClass MechanicalProcess NaturalProcess ;

-- a resonance of mechanical energy.
fun MechanicalResonance : Class ;
fun MechanicalResonance_Class : SubClass MechanicalResonance (both MechanicalProcess Resonance) ;


-- basic (theoretic) mechanics
fun MechanicsDomain : Class ;
fun MechanicsDomain_Class : SubClass MechanicsDomain PhysicsDomain ;

-- a way of doing something, esp. a systematic one;
-- implies an orderly logical arrangement (usually in steps).
fun Method : Class ;
fun Method_Class : SubClass Method Procedure ;

-- An abstract object that models certain aspect of a
-- physical object, is subject to abstraction and idealization.
fun Model : Class ;
fun Model_Class : SubClass Model Abstract ;

-- A creative process of creating a model.
fun Modeling : Class ;
fun Modeling_Class : SubClass Modeling IntentionalProcess ;

-- Metal_oxyde semiconductor field_effect
-- transistor.
fun MosfetTransistor : Class ;
fun MosfetTransistor_Class : SubClass MosfetTransistor FetTransistor ;

-- An actuator intended to deliver mechanical power
fun Motor : Class ;
fun Motor_Class : SubClass Motor MechanicalDevice ;

-- Basic element of a multipole diagram, a
-- multipole is a model of a component of a dynamic system, it can model a
-- real separable component, such as a motor of a vehicle, or just an
-- attribute of the system, such as inertia or friction, multipole interacts
-- with other multipoles through its poles. Multipole Each multipole must have at least one section.
fun Multipole : Class ;
fun Multipole_Class : SubClass Multipole Model ;

-- a set of tags that can be associated
-- with multipoles
fun MultipoleAttribute : Class ;
fun MultipoleAttribute_Class : SubClass MultipoleAttribute InternalAttribute ;

-- Graphical representation of a
-- MultipoleModel.
fun MultipoleDiagram : Class ;
fun MultipoleDiagram_Class : SubClass MultipoleDiagram ContentBearingObject ;

-- Model of a physical system consisting of
-- mutually interconnected multipoles.
fun MultipoleModel : Class ;
fun MultipoleModel_Class : SubClass MultipoleModel Model ;

-- modeling of a dynamic system by means of
-- its representation by a multipole diagram.
fun MultipoleModeling : Class ;
fun MultipoleModeling_Class : SubClass MultipoleModeling Modeling ;

-- A part of multipole pole that models
-- a single energetical interaction. If a pole belongs to a multipole, it also belongs to
-- one of its sections.
fun MultipolePole : Class ;
fun MultipolePole_Class : SubClass MultipolePole Model ;

-- MultipoleSection that contains exactly two
-- poles. MultipolePort Ports do not have three distinct poles.
fun MultipolePort : Class ;
fun MultipolePort_Class : SubClass MultipolePort MultipoleSection ;

-- One of the postulates of the multipole
-- modeling theory.
fun MultipolePostulate : Class ;


-- a multipole variable that have physical
-- dimension and meaning.
fun MultipoleQuantity : Class ;
fun MultipoleQuantity_Class : SubClass MultipoleQuantity Quantity ;

-- A set of poles that is subject to
-- the postulate of continuity. A multipole may consist of one or
-- more sections. Sections of a single multipole do not overlap
-- and cover all its poles. MultipoleSection Each section must have at least two distinct poles.
fun MultipoleSection : Class ;
fun MultipoleSection_Class : SubClass MultipoleSection Model ;

-- a variable that describes energetical
-- interactions between multipoles.
fun MultipoleVariable : Class ;
fun MultipoleVariable_Class : SubClass MultipoleVariable Number ;

-- Property whereby an electromotive force is
-- induced in a circuit by variation of current in a neighboring circuit.
fun MutualInductance : Class ;
fun MutualInductance_Class : SubClass MutualInductance Inductance ;

-- natural sciences (mathematics, physics)
fun NaturalSciencesDomain : Class ;
fun NaturalSciencesDomain_Class : SubClass NaturalSciencesDomain ScienceDomain ;

-- A body remains at rest or in motion with
-- a constant velocity unless acted upon by an external force
fun NewtonsFirstLaw : Class ;
fun NewtonsFirstLaw_Class : SubClass NewtonsFirstLaw NewtonsLaw ;

-- One of three basic laws of classical mechanics.
fun NewtonsLaw : Class ;
fun NewtonsLaw_Class : SubClass NewtonsLaw ScientificLaw ;

-- The rate of change of momentum is
-- proportional to the imposed force and goes in the direction of
-- the force
fun NewtonsSecondLaw : Class ;
fun NewtonsSecondLaw_Class : SubClass NewtonsSecondLaw NewtonsLaw ;

-- Action and reaction are equal and opposite.
fun NewtonsThirdLaw : Class ;
fun NewtonsThirdLaw_Class : SubClass NewtonsThirdLaw NewtonsLaw ;

-- An Amplifier that does not change the polarity 
-- of the input signal.
fun NoninvertingAmplifier : Class ;
fun NoninvertingAmplifier_Class : SubClass NoninvertingAmplifier Amplifier ;

-- The description of the entity (e.g. a Model)
-- involves nonlinear functions.
fun Nonlinear : Class ;
fun Nonlinear_Class : SubClass Nonlinear InternalAttribute ;

-- An ElectricalMultipoleModel containing
-- nonlinear multipoles.
fun NonlinearCircuit : Class ;
fun NonlinearCircuit_Class : SubClass NonlinearCircuit ElectricalMultipoleModel ;

-- An Equation that is not
-- a LinearEquation.
fun NonlinearEquation : Class ;
fun NonlinearEquation_Class : SubClass NonlinearEquation Equation ;

-- A BjtTransistor with N_P_N junctions.
fun NpnTransistor : Class ;
fun NpnTransistor_Class : SubClass NpnTransistor BjtTransistor ;

-- A complex semiconductor device with
-- behaviour similar to the IdealOperationalAmplifier.
fun OperationalAmplifier : Class ;
fun OperationalAmplifier_Class : SubClass OperationalAmplifier ElectricalCircuit ;

-- A DifferentialEquation
-- that is not a PartialDifferentialEquation.
fun OrdinaryDifferentialEquation : Class ;
fun OrdinaryDifferentialEquation_Class : SubClass OrdinaryDifferentialEquation DifferentialEquation ;

-- Resonance taking place in a series RLC
-- circuit, i.e. in a circuit where its elements are connected in_series.
fun ParallelResonance : Class ;
fun ParallelResonance_Class : SubClass ParallelResonance ElectricalResonance ;

-- A DifferentialEquation
-- involving a functions of more than one variable.
fun PartialDifferentialEquation : Class ;
fun PartialDifferentialEquation_Class : SubClass PartialDifferentialEquation DifferentialEquation ;

-- A MechanicalDevice of an object mounted so that
-- it swings freely under the influence of gravity.
fun Pendulum : Class ;
fun Pendulum_Class : SubClass Pendulum MechanicalDevice ;

-- A DC motor in which the auxiliary
-- magnetic field is provided by a permanent magnet.
fun PermanentMagnetDcMotor : Class ;
fun PermanentMagnetDcMotor_Class : SubClass PermanentMagnetDcMotor DcMotor ;

-- A physical dimension such as
-- length, mass, force etc.
fun PhysicalDimension : Class ;
fun PhysicalDimension_Class : SubClass PhysicalDimension Quantity ;

-- An attribute of a multipole pole describing
-- the kind of physical interaction the pole models.
fun PhysicalDomain : Class ;
fun PhysicalDomain_Class : SubClass PhysicalDomain InternalAttribute ;

-- physics
fun PhysicsDomain : Class ;
fun PhysicsDomain_Class : SubClass PhysicsDomain NaturalSciencesDomain ;

-- A BjtTransistor with P_N_P junctions.
fun PnpTransistor : Class ;
fun PnpTransistor_Class : SubClass PnpTransistor BjtTransistor ;

-- The sum of through variables of
-- poles of multipole section is equal to zero.
fun PostulateOfContinuity : Class ;
fun PostulateOfContinuity_Class : SubClass PostulateOfContinuity MultipolePostulate ;

-- PhysicalDimension of power, [W].
fun Power : Ind PhysicalDimension ;


-- power electronic circuits (power supplies etc.)
fun PowerElectronicsDomain : Class ;
fun PowerElectronicsDomain_Class : SubClass PowerElectronicsDomain ElectronicsDomain ;

fun PowerSource_Device : SubClass PowerSource Device ;

-- PhysicalDimension of pressure, [Pa],[N.m^_2].
fun Pressure : Ind PhysicalDimension ;


-- valve that controls the pressure in
-- a fluid
fun PressureControlValve : Class ;
fun PressureControlValve_Class : SubClass PressureControlValve Valve ;

-- A Twopole that models single physical
-- phenomenon, its constitutive relation has special structure.
fun PureTwopole : Class ;
fun PureTwopole_Class : SubClass PureTwopole Twopole ;

-- Pulse_width modulation technique
fun Pwm : Class ;
fun Pwm_Class : SubClass Pwm ElectricalEngineeringMethod ;

-- An ElectricalMultipoleModel containing
-- a ResistorElement and a CapacitorElement.
fun RCCircuit : Class ;
fun RCCircuit_Class : SubClass RCCircuit ElectricalMultipoleModel ;

-- An ElectricalMultipoleModel containing
-- a ResistorElement, an InductorElement and a CapacitorElement.
fun RLCCircuit : Class ;
fun RLCCircuit_Class : SubClass RLCCircuit ElectricalMultipoleModel ;

-- An ElectricalMultipoleModel containing
-- a ResistorElement and an InductorElement.
fun RLCircuit : Class ;
fun RLCircuit_Class : SubClass RLCircuit ElectricalMultipoleModel ;

-- electrical device that transforms alternating
-- into direct current.
fun Rectifier : Class ;
fun Rectifier_Class : SubClass Rectifier ElectricalCircuit ;

-- an electro_mechanical device used as a controlled switch
fun Relay : Class ;
fun Relay_Class : SubClass Relay (both ElectricalComponent MechanicalDevice) ;


-- relays
fun RelaysDomain : Class ;
fun RelaysDomain_Class : SubClass RelaysDomain ElectroMechanicalDevicesDomain ;

-- Most common type of a presure control valve;
-- it consists of a piston that is retained on its seat by a spring
fun ReliefValve : Class ;
fun ReliefValve_Class : SubClass ReliefValve PressureControlValve ;

-- A material's opposition to the flow of
-- electric current.
fun Resistivity : Ind PhysicalAttribute ;


-- An ElectricalComponent that resists the flow of
-- electrical current. A Dissipator from electrical energy domain.
fun ResistorElement : Class ;
fun ResistorElement_Class : SubClass ResistorElement (both ElectricDevice ElectricalComponent) ;


-- a vibration of large amplitude produced by
-- a relatively small vibration near the same frequency of vibration
-- as the natural frequency of the resonating system.
fun Resonance : Class ;
fun Resonance_Class : SubClass Resonance NaturalProcess ;

-- Root_locus control design method
fun RootLocus : Class ;
fun RootLocus_Class : SubClass RootLocus ControlDesignMethod ;

-- Mechanic rotary energetic interaction
fun Rotary : Ind PhysicalDomain ;


fun Rotor_ElectricDevice : SubClass Rotor ElectricDevice ;

fun Rotor_MechanicalDevice : SubClass Rotor MechanicalDevice ;

-- science (natural sciences, engineering, medicine...)
fun ScienceDomain : Class ;
fun ScienceDomain_Class : SubClass ScienceDomain ApplicationDomain ;

-- A generalization based on recurring facts or events 
-- (in science or mathematics etc)
fun ScientificLaw : Class ;
fun ScientificLaw_Class : SubClass ScientificLaw Proposition ;

-- An electrical device that exploits
-- properties of semiconductors.
fun SemiconductorComponent : Class ;
fun SemiconductorComponent_Class : SubClass SemiconductorComponent ElectricalComponent ;

-- A DC motor in which the auxiliary
-- magnetic field is provided an active circuit.
fun SeparatelyExcitedDcMotor : Class ;
fun SeparatelyExcitedDcMotor_Class : SubClass SeparatelyExcitedDcMotor DcMotor ;

-- Resonance taking place in a parallel RLC
-- circuit, i.e. in a circuit where its elements are connected in_parallel.
fun SeriesResonance : Class ;
fun SeriesResonance_Class : SubClass SeriesResonance ElectricalResonance ;

-- A Set of equations
fun SetOfEquations : Class ;
fun SetOfEquations_Class : SubClass SetOfEquations Set ;

-- A revolving rod that transmits power or motion.
fun Shaft : Class ;
fun Shaft_Class : SubClass Shaft MechanicalDevice ;

-- A PowerSource of single phase
-- alternating current.
fun SinglePhasePowerSource : Class ;
fun SinglePhasePowerSource_Class : SubClass SinglePhasePowerSource PowerSource ;

-- A Rectifier of single phase AC
-- voltage.
fun SinglePhaseRectifier : Class ;
fun SinglePhaseRectifier_Class : SubClass SinglePhaseRectifier Rectifier ;

-- solved example
fun SolvedExampleCategory : Ind DocumentCategory ;


-- A PureTwopole that models a generator of either across or through variable.
fun Source : Class ;
fun Source_Class : SubClass Source PureTwopole ;

-- a directional control valve that uses a spool
-- to control the direction of flow
fun SpoolValve : Class ;
fun SpoolValve_Class : SubClass SpoolValve DirectionalControlValve ;

-- a metal device that returns to its shape or
-- position when pushed or pulled or pressed
fun Spring : Class ;
fun Spring_Class : SubClass Spring MechanicalDevice ;

-- A ThroughVariableAccumulator from translatory energy domain.
fun SpringElement : Class ;
fun SpringElement_Class : SubClass SpringElement (both ThroughVariableAccumulator TranslatoryTwopole) ;


-- Stationary part of a motor or generator in or
-- around which the rotor revolves.
fun Stator : Class ;
fun Stator_Class : SubClass Stator (both ElectricDevice MechanicalDevice) ;


-- The physical property of being inflexible
-- and hard to stretch.
fun Stiffness : Ind PhysicalAttribute ;


-- a process of designing an engineering system
fun SystemDesign : Class ;
fun SystemDesign_Class : SubClass SystemDesign EngineersSubprocess ;

-- a process of specifying requirements
-- on a system
fun SystemSpecification : Class ;
fun SystemSpecification_Class : SubClass SystemSpecification EngineersSubprocess ;

-- A practical Method or art applied to some
-- particular task
fun Technique : Class ;
fun Technique_Class : SubClass Technique Method ;

-- a point on an electrical device (such as a 
-- battery) at which electric current enters or leaves
fun Terminal : Class ; --  meronym ElectricalComponent


-- A PowerSource of three phase
-- alternating current.
fun ThreePhasePowerSource : Class ;
fun ThreePhasePowerSource_Class : SubClass ThreePhasePowerSource PowerSource ;

-- A Rectifier of single phase AC
-- voltage.
fun ThreePhaseRectifier : Class ;
fun ThreePhaseRectifier_Class : SubClass ThreePhaseRectifier Rectifier ;

-- A PureTwopole that accumulates through variable.
fun ThroughVariableAccumulator : Class ;
fun ThroughVariableAccumulator_Class : SubClass ThroughVariableAccumulator PureTwopole ;

-- A Source that models a generator of through variable.
fun ThroughVariableSource : Class ;
fun ThroughVariableSource_Class : SubClass ThroughVariableSource Source ;

-- a SemiconductorComponent that consists of three
-- p_n junctions, it is used e.g. in controlled rectifiers.
fun Thyristor : Class ;
fun Thyristor_Class : SubClass Thyristor SemiconductorComponent ;

-- PhysicalDimension of torque, [N/m].
fun Torque : Ind PhysicalDimension ;


-- A Transducer for which the ratio of
-- across variables and through variables respectively is equal.
fun Transformer : Class ;
fun Transformer_Class : SubClass Transformer Transducer ;

-- An ElectricalDevice by which alternating 
-- current of one voltage is changed to another voltage.
fun TransformerDevice : Class ;
fun TransformerDevice_Class : SubClass TransformerDevice ElectricDevice ;

-- A semiconductor device capable of amplification
-- or switching.
fun Transistor : Class ;
fun Transistor_Class : SubClass Transistor SemiconductorComponent ;

-- Mechanic translatory energetic interaction
fun Translatory : Ind PhysicalDomain ;


-- A PureTwopole from translatory energy domain.
fun TranslatoryTwopole : Class ;
fun TranslatoryTwopole_Class : SubClass TranslatoryTwopole PureTwopole ;

fun Truck_Car : SubClass Truck Car ;

-- tutorial
fun TutorialCategory : Ind DocumentCategory ;


-- A Multipole with exactly two poles. Twopole Twopole has exactly one port.
fun Twopole : Class ;
fun Twopole_Class : SubClass Twopole Multipole ;

-- A Multipole with exactly two sections.
fun Twoport : Class ;
fun Twoport_Class : SubClass Twoport Fourpole ;

-- The process of removing of an installed
-- application from a computer.
fun UnInstallation : Class ;
fun UnInstallation_Class : SubClass UnInstallation ITProcess ;

-- An EngineeringComponent for which
-- the principal physical domain is not specified.
fun UnknownDomainDevice : Class ;
fun UnknownDomainDevice_Class : SubClass UnknownDomainDevice EngineeringComponent ;

-- A hydraulic valve.
fun Valve : Class ;
fun Valve_Class : SubClass Valve (both FluidPowerDevice MechanicalDevice) ;


-- Bessel's equation
fun VanderpolsEquation : Class ;
fun VanderpolsEquation_Class : SubClass VanderpolsEquation (both NonlinearEquation OrdinaryDifferentialEquation) ;


-- PhysicalDimension of velocity, [m/s].
fun Velocity : Ind PhysicalDimension ;


-- PhysicalDimension of voltage, [V].
fun Voltage : Ind PhysicalDimension ;


-- valve that controls the flow rate of
-- a fluid
fun VolumeControlValve : Class ;
fun VolumeControlValve_Class : SubClass VolumeControlValve Valve ;

-- PhysicalDimension of volume flow, [m^_3].
fun VolumeFlow : Ind PhysicalDimension ;


-- knowledge base document _ a document in natural language 
-- representing one piece of knowledge in the knowledge base
fun WebDocument : Class ;
fun WebDocument_Class : SubClass WebDocument ContentBearingObject ;

-- knowledge base document attribute
fun WebDocumentAttribute : Class ;
fun WebDocumentAttribute_Class : SubClass WebDocumentAttribute InternalAttribute ;

-- 
fun ZenerDiode : Class ;
fun ZenerDiode_Class : SubClass ZenerDiode Diode ;

-- A meronymy relation similar to part, but
-- for abstract rather than physical things.
fun abstractPart : El Abstract -> El Abstract -> Formula;


-- multipole pole has across variable
fun hasAcrossVariable : El MultipolePole -> El MultipoleVariable -> Formula ;


-- multipole quantity has certain dimension
fun hasDimension : El MultipoleQuantity -> El PhysicalDimension -> Formula ;


-- multipole pole has through variable
fun hasThroughVariable : El MultipolePole -> El MultipoleVariable -> Formula ;


-- multipole quantity has certain variable
fun hasVariable : El MultipoleQuantity -> El MultipoleVariable -> Formula ;


-- associates a SUMO concept with a lexicon word
fun lexicon : El SetOrClass -> El LexiconCategory -> El SymbolicString -> Formula ;


-- A relation similar to WordNet meronymy relation.
-- If class A is a meronym of class B, it means that instances of A
-- typically are parts of instances of B.
fun meronym : Desc Object -> Desc Object -> Formula ;


-- A relation signaling that certain model is
-- convenient for modeling of certain class of devices.
fun models : El Model -> El EngineeringComponent -> Formula ;


-- Relation that holds for pairs of physical
-- dimensions that multiply up into a physical dimension of Power.
-- The first is considered for across variable, the second for through
-- variable.
fun physicalDomain : El PhysicalDimension -> El PhysicalDimension -> El PhysicalDomain -> Formula ;
}