Core Ontology for Petroleum Installations · INF-UFRGS-Ontologies · CNPq INF-UFRGS-ENERGIA inf.ufrgs.br/ontologies/copi dee69df
ISA 5.1 symbol for gauge
proposed equivalent
gauge
IRI: http://www.inf.ufrgs.br/ontologies/copi#Gauge
Generated on 2026-06-25
Natural Language Definition
EN
A gauge is a local measuring instrument that indicates a physical quantity — typically pressure, temperature, or level — by direct transduction from the measured medium, operating without auxiliary power supply.
PT-BR
Um indicador local é um instrumento de medição que indica uma grandeza física — tipicamente pressão, temperatura ou nível — por transdução direta do meio medido, operando sem fonte de alimentação auxiliar.
Formal Axioms
First-Order Logic Theory
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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: Gauge <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 "2026-10-07"^^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 :GaugeMeasurementFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :GaugeMeasurementProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :GaugeMeasurementProcess ] ; rdfs:label "gauge measurement function"@en ; rdfs:label "função de medição por indicador local"@pt-br . ### Process type :GaugeMeasurementProcess rdf:type owl:Class ; rdfs:subClassOf iof-core:PlannedProcess ; rdfs:label "gauge measurement process"@en ; rdfs:label "processo de medição por indicador local"@pt-br . :GaugeMeasurementProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :PhysicalQuantityValue ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :LocalIndication ] . ### Equipment universal: Gauge :Gauge rdf:type owl:Class ; 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 :GaugeMeasurementFunction ] ) ] ; rdfs:label "gauge"@en ; rdfs:label "indicador local"@pt-br ; iof-av:naturalLanguageDefinition "A gauge is a local measuring instrument that indicates a physical quantity — typically pressure, temperature, or level — by direct transduction from the measured medium, operating without auxiliary power supply."@en ; skos:definition "A gauge is a local measuring instrument that indicates a physical quantity — typically pressure, temperature, or level — by direct transduction from the measured medium, operating without auxiliary power supply."@en ; iof-av:naturalLanguageDefinition "Um indicador local é um instrumento de medição que indica uma grandeza física — tipicamente pressão, temperatura ou nível — por transdução direta do meio medido, operando sem fonte de alimentação auxiliar."@pt-br ; skos:definition "[ISO 15926-4] A <GAUGE> is a <FunctionalObject> that is capable of <MEASURING> and <INDICATING> without auxiliary energy supply"@en ; skos:definition "[CFIHOS] A detecting instrument that is used for measuring or testing."@en ; skos:definition "[OnePetro] In a drilling context, a gauge is the diameter of the bit of the hole drilled by the bit when there are no washouts. In the context of screens, a gauge is a rating where each gauge point equals 0.001”. A 12 gauge screen has 0.012” openings (about 300 microns)."@en .
Axiomatization Decision Log
1 Identity-Giving Function
Function class
GaugeMeasurementFunction ⊑ DesignedFunction
Realized in
GaugeMeasurementProcess ⊑ PlannedProcess
2 Genus Determination
Instrument
3 Necessary Parts
Part class Parent Relation
SensingElement MaterialArtifact hasComponentPartAtAllTimes
IndicatingElement MaterialArtifact hasComponentPartAtAllTimes
4 Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PhysicalQuantityValue — pressure, temperature, level, or flow quantity directly from process medium without signal conversion
Outputs (O)
LocalIndication — visual reading on local indicator, no transmitted signal
Transformation (T)
direct transduction of physical quantity into mechanical or visual indication without auxiliary electrical power
The gauge converts the measured physical quantity into a local readable indication using only the energy inherent in the measured quantity, distinguishing it from transmitters and indicators that require auxiliary power.
5 Axiom Mode Decision

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

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