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exported equivalent COPI_0000127
Indicator
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000127
Generated onGerado em 2026-04-15
Natural Language DefinitionDefinição em Linguagem Natural
EN
An indicator is an instrument that displays or shows the value or status of a measured variable or condition to make it perceptible to operators.
PT-BR
Um indicador é um instrumento que exibe ou mostra o valor ou status de uma variável medida ou condição para torná-la perceptível aos operadores.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every indicator is an instrument that bears an indication function to display process information in human-perceptible form.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Definition]∀x (Indicator(x) ↔ Instrument(x) ∧ ∃f (IndicationFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function [Function axiom: IndicationFunction]∀f (IndicationFunction(f) → ∀p (realizedIn(f,p) → IndicationProcess(p)) ∧ ∃p (IndicationProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Process participation signature]∀x ∀f ((Indicator(x) ∧ IndicationFunction(f) ∧ bearerOf(x,f)) → ∃m (InformationBearingEntity(m) ∧ participatesIn(m,f)) ∧ ∃e (VisualInformation(e) ∧ participatesIn(e,f)) ∧ processType(f,MeasurementTransduction)) — Step 5: typed participants in the realising process
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: Indicator <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 "1.1.0-104-g4d16eff" ; 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 "2026-07-13"^^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 :IndicationFunction rdf:type owl:Class ; rdfs:subClassOf :InstrumentationFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :IndicationProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :IndicationProcess ] ; rdfs:label "indication function"@en ; rdfs:label "função de indicação"@pt-br . :InstrumentationFunction rdf:type owl:Class . ### Process type :IndicationProcess rdf:type owl:Class ; rdfs:subClassOf iof-core:PlannedProcess ; rdfs:label "indication process"@en ; rdfs:label "processo de indicação"@pt-br . :IndicationProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :InformationBearingEntity ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :VisualInformation ] . ### Equipment universal: Indicator :Indicator rdf:type owl:Class ; owl:equivalentClass [ rdf:type owl:Class ; owl:intersectionOf ( :Instrument [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :IndicationFunction ] ) ] ; rdfs:label "indicator"@en ; rdfs:label "indicador"@pt-br ; iof-av:naturalLanguageDefinition "An indicator is an instrument that displays or shows the value or status of a measured variable or condition to make it perceptible to operators."@en ; skos:definition "An indicator is an instrument that displays or shows the value or status of a measured variable or condition to make it perceptible to operators."@en ; iof-av:naturalLanguageDefinition "Um indicador é um instrumento que exibe ou mostra o valor ou status de uma variável medida ou condição para torná-la perceptível aos operadores."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every indicator is an instrument that bears an indication function to display process information in human-perceptible form."@en ; iof-av:firstOrderLogicAxiom "∀x(Indicator(x) ↔ (Instrument(x) ∧ ∃f(IndicationFunction(f) ∧ bearerOf(x,f))))"@en ; # Disjointness: Indicator and Transmitter [] rdf:type owl:AllDisjointClasses ; owl:members ( :Indicator :Transmitter ) . # Disjointness: Indicator and Controller [] rdf:type owl:AllDisjointClasses ; owl:members ( :Indicator :Controller ) . # Disjointness: Indicator and Actuator [] rdf:type owl:AllDisjointClasses ; owl:members ( :Indicator :Actuator ) .
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
IndicationFunction ⊑ InstrumentationFunction
Realized in
IndicationProcess ⊑ PlannedProcess
The identity-giving function is the capability to make information visible or perceptible to operators - converting process variables, conditions, or states into human-readable form. This unifies all indicator types from mechanical gauges to digital displays to chemical color changes.
2 Genus DeterminationDeterminação do Gênero
Instrumentbfo:Object (BFO_0000030)
From the parent_candidates, both INSTRUMENTATION FUNCTION and Instrumentation And Control Equipment suggest an instrumentation context. The enriched classes show many indicators as subtypes of 'Instrument' (flow indicator, limit switch, transmitter all use Instrument as genus). Instrument is the most specific appropriate superclass that captures the measurement/indication domain, though it is not yet enriched in our system.
3 Differentia SpecificaDiferença Específica
∃bearerOf.IndicationFunction

An indicator is distinguished from other instruments by its designed function to display or show information rather than measure, transmit, or control.

The minimal differentia is the IndicationFunction - the capability to make process information visible/perceptible to operators. This distinguishes indicators from transmitters (which send signals), controllers (which manipulate), and sensors (which detect but may not display).
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

The only universal necessary part is some form of Display component that makes the indicated information perceptible to operators. Other parts (sensing elements, signal conditioning, housings) vary significantly across subtypes and implementation methods.
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
{'type': 'InformationBearingEntity', 'count': 1, 'constraints': 'measurand or process variable'}
OutputsSaídas
{'type': 'VisualInformation', 'count': 1, 'constraints': 'human-perceptible display'}
TransformationTransformação
information conversion from measurement signal to human-readable display
Indicators transform process information (electrical signals, physical properties, chemical states) into human-perceptible visual displays. The signature is broad to accommodate diverse implementations from mechanical gauges to digital displays to chemical color changes.
Disjoint WithDisjunto com
Transmitter Controller Actuator
C2: Transmitter, Controller. C4: Actuator. Indicators display information locally while transmitters send signals remotely; controllers manipulate process variables while indicators only display; actuators perform physical actions while indicators only show information. These represent incompatible process participation signatures.
MetadataMetadados
COPI IDCOPI IDCOPI_0000127
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000127
StatusStatusexported
Axiom modeModoequivalent
CreatedCriado2026-04-15
UpdatedAtualizado2026-06-25
LLM modelModelo LLMclaude-sonnet-4-20250514
VersionVersão2026-07-13
Quick factsDados rápidos
GenusGêneroInstrument
Root classClasse raizAssembly
Axiom modeModoequivalent
FunctionFunçãoIndicationFunction
ProcessProcessoIndicationProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 4 sources
ISO 15926-4 INDICATOR
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
SLB Glossary indicator
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
ONEPETRO_GLOSSARY Indicator
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
POSC Caesar Indicator
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.