Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every Stator is a MaterialArtifact that bears a StationaryMachineComponentFunction and is part of some RotatingMachine
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Necessary condition]∀x (Stator(x) → MaterialArtifact(x) ∧ ∃f (StationaryMachineComponentFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function
[Function axiom: StationaryMachineComponentFunction]∀f (StationaryMachineComponentFunction(f) → ∀p (realizedIn(f,p) → StationaryMachineComponentProcess(p)) ∧ ∃p (StationaryMachineComponentProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised
[Structural differentia (necessary only)]∀x (Stator(x) → ∃bearerOf.StationaryMachineComponentFunction ⊓ ∃partOf.RotatingMachine) — Step 3: structural property — necessary condition, not sufficient (OWA prevents ≡)
[Necessary part: StatorWinding]∀x (Stator(x) → ∃p (StatorWinding(p) ∧ hasComponentPartAtSomeTime(x,p))) — Step 4: mereological commitment — every instance must have this part
[Process participation signature]∀x ∀f ((Stator(x) ∧ StationaryMachineComponentFunction(f) ∧ bearerOf(x,f)) →
processType(f,Containment)) — 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: Stator
<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
:StationaryMachineComponentFunction rdf:type owl:Class ;
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :StationaryMachineComponentProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :StationaryMachineComponentProcess
] ;
rdfs:label "stationary machine component function"@en ;
rdfs:label "função de componente estacionário de máquina"@pt-br ;
iof-av:naturalLanguageDefinition "A DesignedFunction that is realized in a StationaryMachineComponentProcess and that consists in providing a stationary structural foundation and housing for active elements (such as windings, vanes, or seals) within rotating machinery, maintaining positional stability relative to moving components."@en ;
skos:definition "A DesignedFunction that is realized in a StationaryMachineComponentProcess and that consists in providing a stationary structural foundation and housing for active elements (such as windings, vanes, or seals) within rotating machinery, maintaining positional stability relative to moving components."@en .
### Process type
:StationaryMachineComponentProcess rdf:type owl:Class ;
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "stationary machine component process"@en ;
rdfs:label "processo de componente estacionário de máquina"@pt-br ;
iof-av:naturalLanguageDefinition "A PlannedProcess in which a stator maintains its fixed position relative to rotating components within machinery, providing structural support and housing for electromagnetic windings, guide vanes, or other functional elements that require stable positioning."@en ;
skos:definition "A PlannedProcess in which a stator maintains its fixed position relative to rotating components within machinery, providing structural support and housing for electromagnetic windings, guide vanes, or other functional elements that require stable positioning."@en .
### Equipment universal: Stator
:Stator rdf:type owl:Class ;
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :StationaryMachineComponentFunction
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasComponentPartAtSomeTime ;
owl:someValuesFrom :StatorWinding
] ;
rdfs:label "stator"@en ;
rdfs:label "MaterialArtifact que possui uma StationaryMachineComponentFunction e"@pt-br ;
iof-av:naturalLanguageDefinition "A MaterialArtifact that bears a StationaryMachineComponentFunction and that is the stationary structural component within rotating machinery, providing housing and positional stability for active elements such as windings, vanes, or seals."@en ;
skos:definition "A MaterialArtifact that bears a StationaryMachineComponentFunction and that is the stationary structural component within rotating machinery, providing housing and positional stability for active elements such as windings, vanes, or seals."@en ;
iof-av:naturalLanguageDefinition "Um MaterialArtifact que possui uma StationaryMachineComponentFunction e que é o componente estrutural estacionário dentro de máquinas rotativas, fornecendo alojamento e estabilidade posicional para elementos ativos como bobinas, palhetas ou vedações."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every Stator is a MaterialArtifact that bears a StationaryMachineComponentFunction and is part of some RotatingMachine"@en ;
iof-av:firstOrderLogicAxiom "∀x(Stator(x) → MaterialArtifact(x) ∧ ∃f(StationaryMachineComponentFunction(f) ∧ bearerOf(x,f)) ∧ ∃m(RotatingMachine(m) ∧ partOf(x,m)))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive classification based on structural positioning within rotating machinery. Under OWA, any artifact described as stationary within a rotating machine context could be classified as a stator, but this may include specialized hybrid components, mounting structures, or custom configurations that should not be automatically asserted into the standard stator maintenance category. The structural differentia (stationary positioning) is necessary but making it sufficient requires domain expert validation."@en ;
:StatorWinding rdf:type owl:Class ;
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:label "enrolamento de estator"@pt-br ;
rdfs:label "stator winding"@en .