exported
equivalent
differential pressure gauge
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Differentialpressuregauge
Generated on 2026-04-16
Natural Language Definition
EN
A differential pressure gauge is a pressure gauge that measures and indicates the difference between two pressure inputs using a differential pressure measuring element.
PT-BR
Um manômetro de pressão diferencial é um manômetro que mede e indica a diferença entre duas entradas de pressão usando um elemento de medição de pressão diferencial.
Formal Axioms
Semi-formal (Aristotelian)
Every differential pressure gauge is a pressure gauge that bears a DifferentialPressureMeasurementFunction and has component parts including a DifferentialPressureMeasuringElement and PressurePortPair.
First-Order Logic Theory
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▸ Stored override
∀x (DifferentialPressureGauge(x) ↔ PressureGauge(x) ∧ ∃f(DifferentialPressureMeasurementFunction(f) ∧ bearerOf(x,f)) ∧ ∃e(DifferentialPressureMeasuringElement(e) ∧ hasComponentPartAtAllTimes(x,e)) ∧ ∃p(PressurePortPair(p) ∧ hasComponentPartAtAllTimes(x,p)))
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: DifferentialPressureGauge
<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_0000179 rdf:type owl:Class ; # DifferentialPressureMeasurementFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000470 # DifferentialPressureMeasurementProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000470 # DifferentialPressureMeasurementProcess
] ;
rdfs:label "differential pressure measurement function"@en ;
rdfs:label "função de medição de pressão diferencial"@pt-br .
### Process type
:COPI_0000470 rdf:type owl:Class ; # DifferentialPressureMeasurementProcess
rdfs:subClassOf iof-core:MeasurementProcess ;
rdfs:label "differential pressure measurement process"@en ;
rdfs:label "processo de medição de pressão diferencial"@pt-br .
iof-core:MeasurementProcess rdf:type owl:Class .
:COPI_0000470 # DifferentialPressureMeasurementProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000048 # PressureMeasurementResult
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000048 # PressureMeasurementResult
] .
### Equipment universal: DifferentialPressureGauge
:COPI_0000109 rdf:type owl:Class ; # DifferentialPressureGauge
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000143 # PressureGauge
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000179 # DifferentialPressureMeasurementFunction
]
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasComponentPartAtAllTimes ;
owl:someValuesFrom :COPI_0000251 # DifferentialPressureMeasuringElement
]
)
] ;
rdfs:label "differential pressure gauge"@en ;
rdfs:label "manômetro de pressão diferencial"@pt-br ;
iof-av:naturalLanguageDefinition "A differential pressure gauge is a pressure gauge that measures and indicates the difference between two pressure inputs using a differential pressure measuring element."@en ;
skos:definition "A differential pressure gauge is a pressure gauge that measures and indicates the difference between two pressure inputs using a differential pressure measuring element."@en ;
iof-av:naturalLanguageDefinition "Um manômetro de pressão diferencial é um manômetro que mede e indica a diferença entre duas entradas de pressão usando um elemento de medição de pressão diferencial."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every differential pressure gauge is a pressure gauge that bears a DifferentialPressureMeasurementFunction and has component parts including a DifferentialPressureMeasuringElement and PressurePortPair."@en ;
iof-av:firstOrderLogicAxiom "∀x (DifferentialPressureGauge(x) ↔ PressureGauge(x) ∧ ∃f(DifferentialPressureMeasurementFunction(f) ∧ bearerOf(x,f)) ∧ ∃e(DifferentialPressureMeasuringElement(e) ∧ hasComponentPartAtAllTimes(x,e)) ∧ ∃p(PressurePortPair(p) ∧ hasComponentPartAtAllTimes(x,p)))"@en ;
skos:definition "[ISO 15926-4] A <DIFFERENTIAL PRESSURE GAUGE> is a <PRESSURE GAUGE> and a <DIFFERENTIAL PRESSURE MEASURING INSTRUMENT> using a <DIFFERENTIAL PRESSURE MEASURING ELEMENT>"@en ;
skos:definition "[CFIHOS] A gauge that is intended for measuring and indicating pressure differences."@en .
:COPI_0000251 rdf:type owl:Class ; # DifferentialPressureMeasuringElement
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:label "elemento medidor de pressão diferencial"@pt-br ;
rdfs:label "differential pressure measuring element"@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
DifferentialPressureMeasurementFunction
⊑ DesignedFunction
Realized in
DifferentialPressureMeasurementProcess
⊑ MeasurementProcess
The identity-giving function is measuring the difference between two pressure inputs and displaying this value. This is distinct from absolute pressure measurement as it requires two pressure inputs and computes their difference.
2
Genus Determination
PressureGauge
From parent candidates, 'pressure gauge' is the most specific appropriate superclass and is already enriched in our ontology. The differential pressure gauge inherits the basic pressure measurement capability but specializes it to differential measurement.
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| DifferentialPressureMeasuringElement | MaterialArtifact | hasComponentPartAtAllTimes |
Beyond the basic gauge components inherited from the genus, differential pressure gauges specifically require a differential measuring element and dual pressure ports
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PressureMeasurementResult
— two distinct pressure values from different locations
Outputs (O)
PressureMeasurementResult
— visual display of pressure difference
Transformation (T)
differential pressure computation and indication
Takes two pressure inputs, computes their difference, and displays the result. The signature differs from absolute pressure gauges by requiring two pressure inputs instead of one.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Cross-Standard Observations
ISO15926 provides more technical detail about the differential measuring element while CFIHOS focuses on the functional purpose. Both consistently identify this as a specialized pressure measurement instrument.
Source Definitions
2 sources
ISO 15926-4
DIFFERENTIAL PRESSURE GAUGE ↗
Definition text withheld (copyrighted standard) — follow the source link above.
CFIHOS
differential pressure gauge
Definition text withheld (copyrighted standard) — follow the source link above.
Metadata
| Ontology | COPI |
| Research group | INF-UFRGS-Ontologies |
| Funding | CNPq INF-UFRGS-ENERGIA |
| Project | OntoKG / Petrobras |
| ID | #218 |
| Cluster | differential pressure gauge |
| Status | exported |
| Axiom mode | equivalent |
| Created | 2026-04-16 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
5_2_3/044_pressure_gage.png
