Snippets (text quotes and extracts from authoritative sources)

A Snippet is a short quote or extract (typically a phrase, a sentence, or at most a few sentences) from an authoritative source document such as a specification, technical manual, or design manual. Throughout this site, content is often related to supporting Snippets and each Snippet page links back to the content pages that reference it! The Snippet and Note concepts are very closely related and they support each other.

The Snippet concept is also at the heart of the Parsing Analysis recipe for UML® and SysML®

Kind Snippet quote/extract Source UML keywords SysML keywords Keywords
INFO The xi and scope properties have the PhSVariable stereotype applied, specifying that their values might vary during simulation. SysPhS-1.1 value property SysPhS, signal processing, amplifier, high-pass filter, low-pass filter
INFO The word telescope now refers to a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors. Wikipedia telescope, optical telescope, astronomy
INFO The wavelength of infrared light ranges from 0.75 to 300 micrometers. Infrared falls in between visible radiation, which ranges from 380 to 750 nanometers, and submillimeter waves. Wikipedia infrared, infrared astronomy, mirror, lens
INFO The water heater is fed from a water distiller in this particular usage, so the modeler knows the output will always be distilled water, rather than other kinds of water. OMG Systems Modeling Language (SysML) 1.6 InformationFlow ItemFlow
INFO The volumetric heat capacity of a material is the heat capacity of a sample of the substance divided by the volume of the sample. Wikipedia volumetric heat capacity, thermodynamics, joule, kelvin, water, celsius
INFO The volumetric heat capacity can also be expressed as the specific heat capacity (heat capacity per unit of mass, in J/K/kg) times the density of the substance (in kg/L, or g/mL). Wikipedia volumetric heat capacity, thermodynamics, joule, kelvin, water, celsius
INFO The view and the model elements related to the view are passed to the constructor when it is invoked. The method describes how the exposed elements are navigated to extract the desired information. OMG Systems Modeling Language (SysML) 1.6 Dependency, «Create» Expose, View, Viewpoint::/method
EXAMPLE, INFO The Verify relationship is shown on Figure 16-7 using callout notation anchored to the diagram frame, which indicates that the BurnishTest test case verifies the Burnish requirement. OMG Systems Modeling Language (SysML) 1.6 callout, StateMachine HSUV sample problem, SysML specification figure, Requirement, TestCase, Verify requirements engineering, test engineering
EXAMPLE, INFO The vehicle system specification contains many text based requirements. A few requirements are highlighted in Figure D.11, including the requirement for the vehicle to pass emissions standards, which is expanded for illustration purposes. OMG Systems Modeling Language (SysML) 1.6 Requirement, HSUV sample problem
INFO The values on such object tokens may be used to affect the control of ExecutableNodes that are the targets of such ControlFlows, though the specific meaning of such values is not defined in this specification Semantics of a Foundational Subset for Executable UML Models 1.4 ObjectNode, ObjectNode::isControlType, ControlFlow, token, object token
INFO The values of a connector property are instances of the association block created due to the connector referred to by the connector property. OMG Systems Modeling Language (SysML) 1.6 Connector, AssociationClass ConnectorProperty, AssociationBlock, ParticipantProperty
CONSTRAINT The value to be added is given on the value InputPin, which is required. This InputPin has the same type as the StructuralFeature and a multiplicity of 1..1 (that is, a single value is added). Unified Modeling Language 2.5.1 StructuralFeature, AddStructuralFeatureValueAction, StructuralFeatureAction, InputPin, multiplicity
INFO The value of c can ... be found by using the relation c = fλ. Wikipedia light, wavelength, frequency, radio frequency
INFO The use of namespace containment to specify requirements hierarchies precludes reusing requirements in different contexts since a given model element can only exist in one namespace. OMG Systems Modeling Language (SysML) 1.6 AbstractRequirement, Requirement, composite (compound) requirement
EXAMPLE, INFO The use case diagram for “Drive Vehicle” in Figure D.5 depicts the drive vehicle usage of the vehicle system. The subject (HybridSUV) and the actors (Driver, Registered Owner, Maintainer, Insurance Company, DMV) interact to realize the use case. OMG Systems Modeling Language (SysML) 1.6 UseCase, UseCase::subject, Actor, UseCase Diagram HSUV sample problem
INFO The use case diagram describes the usage of a system (subject) by its actors (environment) to achieve a goal, that is realized by the subject providing a set of services to selected actors. OMG Systems Modeling Language (SysML) 1.7beta1 Actor, UseCase::subject, UseCase
INFO, NOTATION The usage of a constraint block is distinguished from other parts by a box having rounded corners rather than the square corners of an ordinary part. OMG Systems Modeling Language (SysML) 1.6 «keyword» ConstraintBlock, «constraint», constraint property
INFO The usage of a constraint binds the parameters of the constraint, such as F, m, and a, to specific properties of a block, such as a mass, that provide values for the parameters. OMG Systems Modeling Language (SysML) 1.6 Constraint ConstraintBlock, SysML Parametric Diagram, constraint parameter, MD:ConstraintParameter, Block, block property, value property mathematics, equation
INFO The upper multiplicity determines the maximum number of values that can be consumed from an InputPin by a single execution of its Action. Unified Modeling Language 2.5.1 Activity, Activity Diagram, Action, Pin, InputPin, Action::/input, MultiplicityElement::/upper, execution
INFO The United States National Institute of Standards and Technology now recommends the use of the uppercase letter L, a practice that is also widely followed in Canada and Australia. Wikipedia litre, units, scientific unit system, volume, SI unit, SI alternative unit, ISO-80000, Canada, Australia, United States
RULE The type, ordering, and multiplicity of the argument and result pins of a CallAction shall be the same as the corresponding Parameters. Unified Modeling Language 2.5.1 CallAction, CallBehaviorAction, CallOperationAction, StartObjectBehaviorAction, Parameter, Behavior, Operation, Pin
INFO The type of participant properties is shown for clarity, but is always the same as the association end type and can be elided. They are shown with dashed rectangles because they are reference properties. OMG Systems Modeling Language (SysML) 1.6 Port AssociationBlock, ParticipantProperty
INFO The two up quarks and one down quark of a proton are held together by the strong force, mediated by gluons. Wikipedia
CONSTRAINT The Transitions outgoing from a fork Pseudostate cannot have a guard or a trigger. Unified Modeling Language 2.5.1 Pseudostate, Transition, Transition::guard, Transition::trigger, PseudostateKind::fork
INFO The transition from the initial pseudostate to StandBy has a relative TimeEvent with an expression indicating that the transition fires 5 seconds after the initial pseudostate is entered. SysPhS-1.1 StateMachine, Pseudostate, PseudostateKind::initial, PseudostateKind, State, Transition, TimeEvent, TimeEvent::isRelative SysPhS, SysML, Systems Modeling Language
INFO The transition from StandBy to On has a ChangeEvent with an expression indicating that the transition is triggered when u.sigsp [ERROR] is equal to 1 (this is a signal as in signal flow simulation, not as in SysML). SysPhS-1.1 StateMachine, State, Transition, ChangeEvent, ChangeEvent::changeExpression SysPhS, SysML, Systems Modeling Language
INFO The transition from On to StandBy has a ChangeEvent with an expression indicating that the transition is triggered when u.sigsp [ERROR] is equal to 0. SysPhS-1.1 StateMachine, State, Transition, ChangeEvent, ChangeEvent::changeExpression SysPhS, SysML, Systems Modeling Language
INFO The Trace stereotype specializes UML4SysML Trace and DirectedRelationshipPropertyPath to enable traces to identify their sources and targets by a multi-level path of accessible properties from context blocks for the sources and targets. OMG Systems Modeling Language (SysML) 1.6 DirectedRelationship::/source, DirectedRelationship::/target, Trace DirectedRelationshipPropertyPath, Trace, AbstractRequirement::/tracedTo
EXAMPLE, INFO The top portion of Figure 9-11 shows specializations of the block WaterClient into Bath, Sink, and Shower. These are used as part types in the internal structure of the block House 2 shown in the lower portion of the figure OMG Systems Modeling Language (SysML) 1.6
INFO The time at which an Action executes and what inputs are accepted by each execution are determined by the kind of Action it is, characteristics of its InputPins, and the Behavior in which it is used. Unified Modeling Language 2.5.1 Activity, Activity Diagram, Action, execution, Action::/input, InputPin, Behavior
INFO The test section has an Action owning the decider OutputPin with type Boolean identified by the LoopNode. When the test section has completed execution, if the value on the decider OutputPin is true, then the bodyPart is executed. Otherwise ... Unified Modeling Language 2.5.1 Activity, Activity Diagram, LoopNode, LoopNode::test, LoopNode::bodyPart, LoopNode:decider
EXAMPLE, INFO The term “context diagram,” in Figure D.4, refers to a user-defined usage of an internal block diagram, which depicts some of the top level entities in the overall enterprise and their relationships. OMG Systems Modeling Language (SysML) 1.6 context diagram, SysML Internal Block Diagram
INFO The target flow property type shall be the same as, or a generalization of, a classifier of the item flow or the source flow property type, whichever is more specialized. OMG Systems Modeling Language (SysML) 1.6 InformationFlow ItemFlow
INFO The tank constraints specify that the pressure in the tank, pressure depends on the height of the fluid level in the tank, fluidHeight, as well as properties of the fluid, fluidDensity. SysPhS-1.1 Constraint constraint parameter, ConstraintBlock SysPhS, pressure, hydraulics, fluid flow
EXAMPLE, INFO The table shown in Figure D.40 is provided as a specific example of how the «allocate» dependency may be depicted in tabular form, consistent with the automotive example above. OMG Systems Modeling Language (SysML) 1.6 HSUV sample problem, «allocate», Allocate
INFO The system is unstable: the two particles annihilate each other to predominantly produce two or three gamma-rays, depending on the relative spin states. Wikipedia
INFO The sum of the fluid flow rates going through the two pipe openings is zero (the fluid is assumed to be incompressible). SysPhS-1.1 Constraint constraint parameter, ConstraintBlock SysPhS, pressure, hydraulics, fluid flow
INFO The sum of the current going through the two pins adds up to zero (one is the negative of the other), because the components do not create, destroy, or store charge. SysPhS-1.1 Constraint constraint parameter, ConstraintBlock, Block SysPhS
CONSTRAINT The substrings are given as either a list of LiteralString operands or as a list of StringExpression subExpressions (but it is not allowed to mix the two). Unified Modeling Language 2.5.1 Expression, StringExpression, String, value, LiteralString, StringExpression::subExpression, Expression::operand
SEMANTIC The String value of a StringExpression is obtained by concatenating, in order, the String values of either the operands or the subExpressions, depending on which is given. Unified Modeling Language 2.5.1 Expression, StringExpression, String, value, LiteralString, StringExpression::subExpression, Expression::operand
EXAMPLE, INFO The StraightLineVehicleDynamics constraint block from Figure D.32 has been expanded in Figure D.33. ConstraintNotes are used, which identify each constraint using curly brackets {}. In addition, Rationale has been used to explain the meaning ... OMG Systems Modeling Language (SysML) 1.6 HSUV sample problem, Rationale, ConstraintBlock, constraint property, constraint parameter
EXAMPLE, INFO The stereotypes on the object nodes between actions in the figure apply to parameters of the behaviors or operations called by the actions (see the notation for object nodes described in 11.3.1.4, ObjectNode, Variables, and Parameters). OMG Systems Modeling Language (SysML) 1.6 Activity, Behavior, ObjectNode, Parameter, Operation, Variable functional allocation
INFO The stereotypes of proxy and full ports might be elided in these cases to simplify diagrams. OMG Systems Modeling Language (SysML) 1.6 Port FullPort, "standard" Port, ProxyPort
INFO The stereotype does not override UML token offering semantics; it just indicates what happens to the token when it is accepted. When the stereotype is not applied, the semantics are as in UML, specifically, tokens arriving at an object node ... OMG Systems Modeling Language (SysML) 1.6 ObjectNode, ActivityNode::outgoing, InputPin, Action::/input «noBuffer», NoBuffer
INFO The stereotype does not override UML token offering semantics, just indicates what happens to the token when it is accepted. When the stereotype is not applied, the semantics is as in UML, specifically, tokens arriving at object nodes do not replace ... OMG Systems Modeling Language (SysML) 1.6 ObjectNode, MultiplicityElement::/upper, InputPin, Action::/input, token Overwrite, «overwrite»
INFO The stereotype applies to all parameters corresponding to the pins notated by the object node. OMG Systems Modeling Language (SysML) 1.6 Stereotype, Parameter, Pin, ObjectNode, elided Pin notation secondary stereotype, SysML, Systems Modeling Language, MagicDraw SysML, Cameo Systems Modeler
INFO The state machine has one initial pseudostate, and two states StandBy and On. SysPhS-1.1 StateMachine, Pseudostate, PseudostateKind::initial, PseudostateKind, State SysPhS, SysML, Systems Modeling Language
INFO The start of the book begins with an eight-year-old orphan girl named Sophie lying in bed ... Wikipedia Webel Parsing Analysis
INFO The Standard Model is the theoretical framework describing all the currently known elementary particles. This model contains six flavors of quarks (q), named up (u), down (d), strange (s), charm (c), bottom (b), and top (t). Wikipedia
INFO, NOTATION The standalone Pin in the notation maps to an OutputPin and an InputPin and one ObjectFlow edge between them in the underlying model. This form should be avoided if the Pins are not of the same type. Unified Modeling Language 2.5.1 ObjectNode, ActivityEdge, ObjectFlow
INFO The stakeholder and viewpoint share the same concern via comments that are shown textually as values of the concern property. The comments could be shown graphically with annotation relationships to stakeholders and viewpoints, if needed. OMG Systems Modeling Language (SysML) 1.6 View, Viewpoint, Stakeholder, Stakeholder::/concern, Viewpoint::concernList
INFO The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is defined as 299792458 metres per second (approximately 300000 km/s, or 186000 mi/s) Wikipedia light
INFO The specialization on the lower right restricts the number of cylinders to between six and eight, rules out any roll bar, and limits lug bolts per wheel to between 6 and 7, by giving the end path upper and lower values. OMG Systems Modeling Language (SysML) 1.6 Generalization, Property::redefinedProperty BoundReference, BindingConnector, nested Property
INFO The specialization on the lower left restricts the number of cylinders to four, requires a light roll bar, and a total of 24 lug bolts over all the wheels. OMG Systems Modeling Language (SysML) 1.6 Generalization, Property::redefinedProperty BoundReference, BindingConnector, nested Property
EXAMPLE, INFO The spatial relationship of the entities on the diagram sometimes conveys understanding as well, although this is not specifically captured in the semantics. OMG Systems Modeling Language (SysML) 1.6 context diagram, SysML Internal Block Diagram
INFO The source constraint specifies a sine wave signal with the parameter amp as its amplitude. The sink constraint displays (scopes) the output signal from the signal processor. SysPhS-1.1 Constraint ConstraintBlock, constraint parameter SysPhS, signal processing
INFO The source constraint defines the voltage across it as a sine wave with the parameter amp as its amplitude. SysPhS-1.1 Constraint constraint parameter, ConstraintBlock, Block SysPhS
INFO The source constraint defines the circuit’s electrical source. The ground constraint specifies that the voltage at the ground pin is zero. SysPhS-1.1 Constraint constraint parameter, ConstraintBlock, Block SysPhS
CAVEAT The sole mechanism for asynchronous invocation in fUML is via send signal action. This can be used to achieve the effect of broadcasting and sending objects. Semantics of a Foundational Subset for Executable UML Models 1.4 BroadcastSignalAction, SendObjectAction, SendSignalAction fUML
INFO, NOTATION The situation in which the OutputPin of one Action is connected to the InputPin of the same name in another Action via an ObjectFlow may be shown by the optional notations of Figure 16.6. Unified Modeling Language 2.5.1 ObjectNode, ActivityEdge, ObjectFlow
INFO The setupPart of a LoopNode is executed first. When the setupPart has completed execution, the iterative execution of the loop begins. Unified Modeling Language 2.5.1 Activity, Activity Diagram, LoopNode, LoopNode::setupPart
INFO The set of Interfaces realized by a BehavioredClassifier are its provided Interfaces, which represent the services and obligations that instances of that BehavioredClassifier offer to their clients. Unified Modeling Language 2.5.1 BehavioredClassifier, Interface, BehavioredClassifier::interfaceRealization, InterfaceRealization, provided Interface
NOTATION The send and receive events may both be on the same lifeline. OMG Systems Modeling Language (SysML) 1.6 Message, MessageEnd
INFO The semantics of ElementGroup is modeler-defined. In particular, the body text is not restricted. It can describe the grouped elements as well as elements or values related to the grouped elements. OMG Systems Modeling Language (SysML) 1.6 Comment ElementGroup
INFO The semantics of a Transition depend on its relationship to its source Vertex. Three different possibilities are defined, depending on the value of the Transition’s kind attribute ... Unified Modeling Language 2.5.1 State, StateMachine, Transition, Transition::source, Vertex, TransitionKind, Transition::kind, TransitionKind::external, TransitionKind::internal, TransitionKind::local
SEMANTIC The semantics are undefined for adding a value that violates the upper multiplicity of the StructuralFeature, and for adding a new value to a StructuralFeature with isReadonly=true after initialization of the object that would have the value. Unified Modeling Language 2.5.1 StructuralFeature, AddStructuralFeatureValueAction, StructuralFeatureAction, AddStructuralFeatureValueAction::insertAt, StructuralFeature::isReadonly, MultiplicityElement::/upper, MultiplicityElement::upperValue
SEMANTIC The semantics are undefined for a value of 0 or an integer greater than the number of existing values Unified Modeling Language 2.5.1 StructuralFeature, AddStructuralFeatureValueAction, StructuralFeatureAction, AddStructuralFeatureValueAction::insertAt
INFO The selection and transformation Behaviors on outgoing ObjectFlows can be used to get information out of a DataStoreNode as if a query were being performed. Unified Modeling Language 2.5.1 Activity, DataStoreNode, ObjectFlow::selection, Behavior, ObjectFlow::transformation
INFO The second constraint is that the across variable should be the lowest order derivative to appear in any of our constitutive or empirical equations in the domain. Modelica By Example Modelica, acausal connection
INFO The second class of variables we will discuss are “through” variables (also called flow variables). Flow variables normally represent the flow of some conserved quantity like mass, momentum, energy, charge, etc. Modelica By Example Modelica, acausal connection
INFO the second are the muonic leptons, comprising the muon ( μ− ) and the muon neutrino ( ν μ); Wikipedia
INFO The Sample Problem in Annex D provides definitions of the containing EconomyContext block for which this parametric diagram is shown. OMG Systems Modeling Language (SysML) 1.6 SysML Parametric Diagram, BindingConnector
NOTATION The same modeled UseCase may be visually depicted as separate ellipses within multiple subject rectangles. Unified Modeling Language 2.5.1 UseCase, UseCase Diagram, UseCase::subject
INFO The Ritchey–Chrétien telescope ... is a specialized Cassegrain reflector which has two hyperbolic mirrors (instead of a parabolic primary). Wikipedia reflecting telescope, reflector, optical telescope, telescope, secondary mirror, primary mirror, hyperbolic mirror, Ritchey–Chrétien telescope
INFO The resulting attraction between different quarks causes the formation of composite particles known as hadrons Wikipedia
EXAMPLE, INFO The result of Calculate Traction is filtered by a decision node for a threshold value and Calculate Modulation Frequency determines the output of the activity. OMG Systems Modeling Language (SysML) 1.6 DecisionNode, Activity, ActivityParameterNode SysML specification figure
INFO The rest of the connectors linked to a port are external. OMG Systems Modeling Language (SysML) 1.6 Port, ConnectorEnd::partwithPort, internal Connector NestedConnectorEnd
INFO The rest masses of quarks contribute only about 1% of a proton's mass. Wikipedia
INFO The requirements modeling constructs are intended to provide a bridge between traditional requirements management tools and the other SysML models. OMG Systems Modeling Language (SysML) 1.6 Requirement, AbstractRequirement::text, Satisfy, Verify, DeriveReqt, Copy, SysML Requirements Diagram requirements engineering
INFO The requirements diagram described in this clause can depict the requirements in graphical, tabular, or tree structure format. A requirement can also appear on other diagrams to show its relationship to other modeling elements. OMG Systems Modeling Language (SysML) 1.6 Requirement, AbstractRequirement::text, Satisfy, Verify, DeriveReqt, Copy, SysML Requirements Diagram requirements engineering
INFO The requirement diagram is a new SysML diagram type. A requirement diagram provides a modeling construct for text- based requirements, and the relationship between requirements and other model elements that satisfy or verify them. OMG Systems Modeling Language (SysML) 1.6 Diagram SysML Requirement Diagram, Requirement, Satisfy, Verify, TestCase, DeriveReqt, Copy, AbstractRequirement::text Systems Modeling Language, SysML, requirements engineering
INFO The remainder of a proton's mass is due to quantum chromodynamics binding energy, which includes the kinetic energy of the quarks and the energy of the gluon fields that bind the quarks together. Wikipedia
EXAMPLE, INFO The relationship between the views (OperationalView and PerformanceView) and the rest of the user model are explicitly expressed using the «import» relationship. OMG Systems Modeling Language (SysML) 1.6 Package, ElementImport HSUV sample problem, View
SEMANTIC The Regions of the submachine StateMachine are the Regions of the composite State. Unified Modeling Language 2.5.1 State, StateMachine, submachine, Region, composite State
INFO The reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. Wikipedia telescope, optical telescope, astronomy
INFO The Refine stereotype specializes UML4SysML Refine and DirectedRelationshipPropertyPath to enable refinements to identify their sources and targets by a multi-level path of accessible properties from context blocks for the sources and targets. OMG Systems Modeling Language (SysML) 1.6 Refine, DirectedRelationship::/source, DirectedRelationship::/target Refine, DirectedRelationshipPropertyPath
INFO The receptions compartment contains ownedReceptions ... Unified Modeling Language 2.5.1 Class, symbol, compartment, Reception, receptions compartment, Signal
INFO The reason for this constraint is that the through variable will be used to formulate generalized conservation equations in our system. As such, it is essential that the through variables be conserved quantities. Modelica By Example Modelica, acausal connection
INFO The rake notations on the control operator and Monitor Traction indicate they are further defined by activities, as shown in Figure 11-11 and Figure 11-12. An alternative notation for this activity decomposition is shown in Figure 11-13. OMG Systems Modeling Language (SysML) 1.6 rake icon, Activity SysML specification figure, ControlOperator, ControlValueKind, ControlValueKind::disable, ControlValueKind::enable
INFO The radiator on the left requires distilled water, and its connection to the water heater is compatible because the item flow narrows the items to distilled water. OMG Systems Modeling Language (SysML) 1.6 InformationFlow ItemFlow
INFO The quarks that determine the quantum numbers of hadrons are called valence quarks; apart from these, any hadron may contain an indefinite number of virtual "sea" quarks, antiquarks, and gluons, which do not influence its quantum numbers. Wikipedia
INFO The PropertySpecificType stereotype can be applied to classifiers that type exactly one property and that are owned by the owner of that property. Classifiers with this stereotype applied shall be generalized by at most one other classifier. OMG Systems Modeling Language (SysML) 1.6 Classifier, Stereotype, Property PropertySpecificType
INFO The properties disappear once an item leaves a warehouse or a resource is no longer used in a factory, because they are declassified as WarehouseItems and FactoryResources at that time, respectively. OMG Systems Modeling Language (SysML) 1.6 Classifier, Stereotype, Property PropertySpecificType
INFO The properties appear when an item arrives in a warehouse or a resource is used in a factory, because they are classified as WarehouseItems and FactoryResources at that time, respectively OMG Systems Modeling Language (SysML) 1.6 Classifier, Stereotype, Property PropertySpecificType
EXAMPLE, INFO The Power requirement is satisfied by the PowerSubsystem, and a Max Acceleration test case verifies the Acceleration requirement. OMG Systems Modeling Language (SysML) 1.6 UseCase HSUV sample problem, Requirement, TestCase, Verify, Block, «subsystem»
INFO The positron is symbolized by e+ because it has the same properties as the electron but with a positive rather than negative charge. Wikipedia
EXAMPLE, INFO The ports on the FuelTankAssembly and InternalCombustionEngine (as shown in Figure D.19) are defined in Figure D.23. OMG Systems Modeling Language (SysML) 1.6 Port HSUV sample problem
INFO The port types have an additional flow property that is not in the nested ports. These are for the flow of the engine, as opposed to its parts. OMG Systems Modeling Language (SysML) 1.6 Connector, InformationFlow::conveyed ItemFlow, AssociationBlock
INFO The pipe constraints specify that the pressure pressureDiff across it is equal to the difference of fluid pressures opening1Pressure and opening2Pressure at each end of the pipe. SysPhS-1.1 Constraint constraint parameter, ConstraintBlock SysPhS, pressure, hydraulics, fluid flow
INFO The Pauli exclusion principle is the quantum mechanical principle which states that two or more identical fermions (particles with half-integer spin) cannot occupy the same quantum state within a quantum system simultaneously. Wikipedia