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exported equivalent COPI_0000129
Level Indicator
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000129
Generated onGerado em 2026-05-02
Natural Language DefinitionDefinição em Linguagem Natural
EN
A level indicator is an indicator that measures and locally displays the level of liquid or bulk solid material in a vessel or tank.
PT-BR
Um indicador de nível é um indicador que mede e exibe localmente o nível de material líquido ou sólido a granel em um vaso ou tanque.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every level indicator is an indicator that has the function to measure and locally indicate level.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Definition]∀x (LevelIndicator(x) ↔ Indicator(x) ∧ ∃f (LevelIndicationFunction(f) ∧ bearerOf(x,f)) ∧ ∃hasFunction.LevelMeasurementFunction) — Steps 1–3: genus + identity-giving function [Function axiom: LevelIndicationFunction]∀f (LevelIndicationFunction(f) → ∀p (realizedIn(f,p) → LevelIndicationProcess(p)) ∧ ∃p (LevelIndicationProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Process participation signature]∀x ∀f ((LevelIndicator(x) ∧ LevelIndicationFunction(f) ∧ bearerOf(x,f)) → ∃m1 (FluidPortion(m1) ∧ participatesIn(m1,f)) ∧ ∃m2 (SolidPortion(m2) ∧ participatesIn(m2,f)) ∧ ∃e (VisualSignal(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: LevelIndicator <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 :LevelIndicationFunction rdf:type owl:Class ; rdfs:subClassOf :IndicationFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :LevelIndicationProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :LevelIndicationProcess ] ; rdfs:label "level indication function"@en ; rdfs:label "função de indicação de nível"@pt-br . :IndicationFunction rdf:type owl:Class . ### Process type :LevelIndicationProcess rdf:type owl:Class ; rdfs:subClassOf iof-core:PlannedProcess ; rdfs:label "level indication process"@en ; rdfs:label "processo de indicação de nível"@pt-br . :LevelIndicationProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :FluidPortion ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :SolidPortion ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :VisualSignal ] . ### Equipment universal: LevelIndicator :LevelIndicator rdf:type owl:Class ; owl:equivalentClass [ rdf:type owl:Class ; owl:intersectionOf ( :Indicator [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :LevelIndicationFunction ] ) ] ; rdfs:label "level indicator"@en ; rdfs:label "indicador de nível"@pt-br ; iof-av:naturalLanguageDefinition "A level indicator is an indicator that measures and locally displays the level of liquid or bulk solid material in a vessel or tank."@en ; skos:definition "A level indicator is an indicator that measures and locally displays the level of liquid or bulk solid material in a vessel or tank."@en ; iof-av:naturalLanguageDefinition "Um indicador de nível é um indicador que mede e exibe localmente o nível de material líquido ou sólido a granel em um vaso ou tanque."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every level indicator is an indicator that has the function to measure and locally indicate level."@en ; iof-av:firstOrderLogicAxiom "∀x (LevelIndicator(x) ↔ (Indicator(x) ∧ ∃f (LevelIndicationFunction(f) ∧ hasFunction(x,f))))"@en ; # Disjointness: LevelIndicator and LevelTransmitter [] rdf:type owl:AllDisjointClasses ; owl:members ( :LevelIndicator :LevelTransmitter ) . # Disjointness: LevelIndicator and TemperatureIndicator [] rdf:type owl:AllDisjointClasses ; owl:members ( :LevelIndicator :TemperatureIndicator ) . # Disjointness: LevelIndicator and PressureGauge [] rdf:type owl:AllDisjointClasses ; owl:members ( :LevelIndicator :PressureGauge ) .
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
LevelIndicationFunction ⊑ IndicationFunction
Realized in
LevelIndicationProcess ⊑ PlannedProcess
The identity-giving function is to measure and locally display fluid or solid level - this distinguishes it from level transmitters (which provide remote signals) and other measurement instruments. This function already exists in the enriched ontology.
2 Genus DeterminationDeterminação do Gênero
indicatorbfo:Object (BFO_0000030)
Level indicator is a subtype of the general indicator class, which provides local display functionality. The enriched ontology already defines 'indicator' with IndicationFunction, making it the most specific appropriate superclass. No domain-specific parent candidates were provided, so this follows the natural hierarchy.
3 Differentia SpecificaDiferença Específica
∃hasFunction.LevelMeasurementFunction

Specifically measures and indicates level of liquid or bulk solid material in vessels or tanks.

The differentia is the specific measurement function - level measurement - combined with the inherited local indication capability from the genus. This distinguishes it from other indicators that measure different process variables.
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

These two parts are universally necessary - the sensing element performs the measurement and the local display presents the information locally, which are the two essential functions of any level indicator
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
{'type': 'FluidPortion', 'count': 1, 'constraints': 'contained in vessel or tank'}, {'type': 'SolidPortion', 'count': 1, 'constraints': 'bulk solid material in vessel or tank'}
OutputsSaídas
{'type': 'VisualSignal', 'count': 1, 'constraints': 'local level display information'}
TransformationTransformação
measurement transduction from physical level to visual indication
Level indicators measure either liquid or bulk solid level in containment and convert this to local visual indication for operator reading
Disjoint WithDisjunto com
level transmitter temperature indicator pressure gauge
C2: temperature indicator, pressure gauge. C?: level transmitter [kind_ambiguous]. C?: level switch [kind_ambiguous]. Level transmitter provides remote signals (incompatible with local-only indication), level switch provides switching rather than continuous indication, temperature/pressure indicators measure different variables
MetadataMetadados
COPI IDCOPI IDCOPI_0000129
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000129
StatusStatusexported
Axiom modeModoequivalent
CreatedCriado2026-05-02
UpdatedAtualizado2026-06-25
LLM modelModelo LLMclaude-sonnet-4-20250514
VersionVersão2026-07-13
Quick factsDados rápidos
GenusGêneroindicator
Root classClasse raizAssembly
Axiom modeModoequivalent
FunctionFunçãoLevelIndicationFunction
ProcessProcessoLevelIndicationProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 1 source
ISA5_1 level 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.