Core Ontology for Petroleum Installations · INF-UFRGS-Ontologies · CNPq INF-UFRGS-ENERGIA inf.ufrgs.br/ontologies/copi dee69df
ISA 5.1 symbol for differential pressure switch
exported equivalent
differential pressure switch
IRI: http://www.inf.ufrgs.br/ontologies/copi#Differentialpressureswitch
Generated on 2026-04-16
Natural Language Definition
EN
A differential pressure switch is a pressure switch that bears a differential pressure switching function to switch or provide on/off signals when the measured differential pressure between two inputs reaches a pre-set value.
PT-BR
Um interruptor de pressão diferencial é um interruptor de pressão que possui uma função de comutação de pressão diferencial para comutar ou fornecer sinais liga/desliga quando a pressão diferencial medida entre duas entradas atinge um valor pré-estabelecido.
Formal Axioms
Semi-formal (Aristotelian)
Every differential pressure switch is a pressure switch that has the function to switch based on differential pressure measurements between two pressure inputs.
First-Order Logic Theory
Loading…
▸ Stored override ∀x(DifferentialPressureSwitch(x) ↔ PressureSwitch(x) ∧ ∃f(DifferentialPressureSwitchingFunction(f) ∧ bearerOf(x,f)))
OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> . @prefix : <https://www.inf.ufrgs.br/ontologies/copi/> . @prefix owl: <http://www.w3.org/2002/07/owl#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . @prefix bfo: <http://purl.obolibrary.org/obo/> . @prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> . @prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> . @prefix skos: <http://www.w3.org/2004/02/skos/core#> . @prefix qudt: <http://qudt.org/schema/qudt/> . @prefix dcterms: <http://purl.org/dc/terms/> . @prefix foaf: <http://xmlns.com/foaf/0.1/> . @prefix apv: <http://inf.ufrgs.br/ontologies/apv#> . ### COPI — Core Ontology for Petroleum Installations ### Class module: DifferentialPressureSwitch <https://www.inf.ufrgs.br/ontologies/copi> rdf:type owl:Ontology ; dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ; dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ; dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ; skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ; skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ; skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ; skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ; owl:versionInfo "1.1.0" ; owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ; owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ; dcterms:creator "Nicolau Oyhenard dos Santos"@en ; dcterms:contributor "Cauã Antunes" ; dcterms:contributor "Haroldo Rojas" ; dcterms:contributor "Rafael Petry" ; dcterms:contributor "Régis Romeu" ; dcterms:contributor "Mara Abel" ; dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ; dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ; dcterms:license <https://creativecommons.org/licenses/by/4.0/> ; dcterms:created "2026-04-08"^^xsd:date ; dcterms:modified "2026-10-08"^^xsd:date ; apv:GlobalMinLanguageCoverage "en pt-br" ; apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ; apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" . iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ; apv:MinAnnotationLength 20 . ### Identity-giving function :COPI_0000471 rdf:type owl:Class ; # DifferentialPressureSwitchingFunction rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :COPI_0000472 # DifferentialPressureSwitchingProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :COPI_0000472 # DifferentialPressureSwitchingProcess ] ; rdfs:label "differential pressure switching function"@en ; rdfs:label "função de chaveamento por pressão diferencial"@pt-br . ### Process type :COPI_0000472 rdf:type owl:Class ; # DifferentialPressureSwitchingProcess rdfs:subClassOf iof-core:MeasurementProcess ; rdfs:label "differential pressure switching process"@en ; rdfs:label "processo de chaveamento por pressão diferencial"@pt-br . iof-core:MeasurementProcess rdf:type owl:Class . :COPI_0000472 # DifferentialPressureSwitchingProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :COPI_0000037 # PortionOfFluid ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom iof-core:InformationContentEntity ] . ### Equipment universal: DifferentialPressureSwitch :COPI_0000252 rdf:type owl:Class ; # DifferentialPressureSwitch owl:equivalentClass [ rdf:type owl:Class ; owl:intersectionOf ( :COPI_0000091 # Instrument [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :COPI_0000471 # DifferentialPressureSwitchingFunction ] ) ] ; rdfs:label "differential pressure switch"@en ; rdfs:label "interruptor de pressão diferencial"@pt-br ; iof-av:naturalLanguageDefinition "A differential pressure switch is a pressure switch that bears a differential pressure switching function to switch or provide on/off signals when the measured differential pressure between two inputs reaches a pre-set value."@en ; skos:definition "A differential pressure switch is a pressure switch that bears a differential pressure switching function to switch or provide on/off signals when the measured differential pressure between two inputs reaches a pre-set value."@en ; iof-av:naturalLanguageDefinition "Um interruptor de pressão diferencial é um interruptor de pressão que possui uma função de comutação de pressão diferencial para comutar ou fornecer sinais liga/desliga quando a pressão diferencial medida entre duas entradas atinge um valor pré-estabelecido."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every differential pressure switch is a pressure switch that has the function to switch based on differential pressure measurements between two pressure inputs."@en ; iof-av:firstOrderLogicAxiom "∀x(DifferentialPressureSwitch(x) ↔ PressureSwitch(x) ∧ ∃f(DifferentialPressureSwitchingFunction(f) ∧ bearerOf(x,f)))"@en ; skos:definition "[ISO 15926-4] A <DIFFERENTIAL PRESSURE SWITCH> is a <PRESSURE SWITCH> and a <DIFFERENTIAL PRESSURE MEASURING INSTRUMENT>"@en ; skos:definition "[CFIHOS] A pilot switch intended to switch or give an on/off signal when the measured differential pressure has reached a pre-set value."@en . # Disjointness: DifferentialPressureSwitch and FlowSwitch [] rdf:type owl:AllDisjointClasses ; owl:members ( :COPI_0000252 :COPI_0000279 ) . # DifferentialPressureSwitch, FlowSwitch # Disjointness: DifferentialPressureSwitch and LevelSwitch [] rdf:type owl:AllDisjointClasses ; owl:members ( :COPI_0000252 :COPI_0000309 ) . # DifferentialPressureSwitch, LevelSwitch
Axiomatization Decision Log
1 Identity-Giving Function
Function class
DifferentialPressureSwitchingFunction ⊑ DesignedFunction
Realized in
DifferentialPressureSwitchingProcess ⊑ MeasurementProcess
The identity-giving function is to switch or provide on/off signals when measured differential pressure reaches a pre-set value, combining differential pressure measurement with switching action
2 Genus Determination
Instrument
ISO 15926 explicitly states that a differential pressure switch is a pressure switch. From parent candidates, PRESSURE SWITCH is the most specific and appropriate superclass, though it is not yet enriched in our ontology
3 Necessary Parts

No necessary parts recorded (concept may be primitive at this level).

Essential components for differential pressure measurement and switching functionality
4 Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid — at different pressures for differential measurement
Outputs (O)
InformationContentEntity — on/off or digital switch state
Transformation (T)
pressure difference measurement converted to electrical switching signal
Takes two pressure inputs, measures their difference, and outputs electrical switching signal when preset threshold is reached
5 Axiom Mode Decision

Necessary + Sufficient — modelled as a defined class (≡, EquivalentClass). Automatic classification is appropriate for this concept.

Disjointness Axioms
FlowSwitch LevelSwitch
C?: FlowSwitch [kind_ambiguous]. C?: LevelSwitch [kind_ambiguous]. Different measurement parameters (pressure vs temperature/flow/level) make these switch types incompatible
Cross-Standard Observations
ISO 15926 provides a clear hierarchical relationship (subtype of pressure switch and differential pressure measuring instrument), while CFIHOS focuses on the functional behavior (pilot switch with preset trigger value). Both definitions are consistent and complementary.

Suggest a change

Opens a pre-filled GitHub issue on the COPI repo — nothing is sent until you submit it there.