exported
necessary
rotor
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Rotor
Generated on 2026-05-04
Natural Language Definition
EN
An Assembly that participates in rotational motion and has a rotor shaft as an essential component, designed to transfer mechanical energy through rotational motion within a machine assembly.
PT-BR
Um Assembly que participa em movimento rotacional e tem um eixo do rotor como componente essencial, projetado para transferir energia mecânica através de movimento rotacional dentro de um conjunto de máquina.
Formal Axioms
Semi-formal (Aristotelian)
Every Rotor is an Assembly that participates in some RotationalMotionProcess and has some rotor shaft as component part at all times.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(Rotor(x) → Assembly(x) ∧ ∃p(RotationalMotionProcess(p) ∧ participatesIn(x,p)) ∧ ∃s(RotorShaft(s) ∧ hasComponentPartAtAllTimes(x,s)))
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: Rotor
<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_0000625 rdf:type owl:Class ; # RotationalEnergyTransferFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000626 # RotationalEnergyTransferProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000626 # RotationalEnergyTransferProcess
] ;
rdfs:label "rotational energy transfer function"@en ;
rdfs:label "função de transferência de energia rotacional"@pt-br ;
iof-av:naturalLanguageDefinition "A DesignedFunction that is realized in a RotationalEnergyTransferProcess and that consists in the capacity to transfer mechanical energy through rotational motion within a machine assembly."@en ;
skos:definition "A DesignedFunction that is realized in a RotationalEnergyTransferProcess and that consists in the capacity to transfer mechanical energy through rotational motion within a machine assembly."@en .
### Process type
:COPI_0000626 rdf:type owl:Class ; # RotationalEnergyTransferProcess
rdfs:subClassOf :COPI_0000003 ; # MomentumTransfer
rdfs:label "rotational energy transfer process"@en ;
rdfs:label "processo de transferência de energia rotacional"@pt-br ;
iof-av:naturalLanguageDefinition "A PlannedProcess in which a rotor transfers mechanical energy through its rotational motion, enabling the operation of rotating machinery such as motors, compressors, pumps, and turbines."@en ;
skos:definition "A PlannedProcess in which a rotor transfers mechanical energy through its rotational motion, enabling the operation of rotating machinery such as motors, compressors, pumps, and turbines."@en .
:COPI_0000003 rdf:type owl:Class . # MomentumTransfer
### Equipment universal: Rotor
:COPI_0000342 rdf:type owl:Class ; # Rotor
rdfs:subClassOf iof-core:Assembly ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000625 # RotationalEnergyTransferFunction
] ;
rdfs:label "rotor"@en ;
rdfs:label "rotor"@pt-br ;
iof-av:naturalLanguageDefinition "An Assembly that participates in rotational motion and has a rotor shaft as an essential component, designed to transfer mechanical energy through rotational motion within a machine assembly."@en ;
skos:definition "An Assembly that participates in rotational motion and has a rotor shaft as an essential component, designed to transfer mechanical energy through rotational motion within a machine assembly."@en ;
iof-av:naturalLanguageDefinition "Um Assembly que participa em movimento rotacional e tem um eixo do rotor como componente essencial, projetado para transferir energia mecânica através de movimento rotacional dentro de um conjunto de máquina."@pt-br ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "As a constructive type defined by physical configuration (rotating portion with shaft), providing sufficient conditions under OWA could lead to overclassification. Complex assemblies containing rotating elements might be incorrectly classified as rotors rather than their proper categories (motors, compressors, etc.)."@en ;
rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000196 ; owl:someValuesFrom :COPI_0000059 ] ;
skos:definition "[ISO 15926-4] A <ROTOR> is a <MACHINE COMPONENT> that is the rotating portion of a machine"@en ;
skos:definition "[OnePetro] The rotating shaft in a PDM motor."@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
RotationalEnergyTransferFunction
⊑ DesignedFunction
Realized in
RotationalEnergyTransferProcess
⊑ MomentumTransfer
While rotors appear in diverse applications (motors, compressors, pumps), their universal identity-giving function is the transfer of mechanical energy through rotation. This distinguishes rotors from stationary machine components and enables the various specialized functions of different rotor types.
2
Genus Determination
Assembly
bfo:Object (BFO_0000030)
Causally unified material artefact composed of physically connected,
separable MaterialComponent parts. Satisfies
Assembly ⊑ MaterialArtifact ⊑ bfo:Object.
A rotor is a machine component with physically connected parts (shaft, blades, windings, etc.) that functions as a causally unified whole. It is more specific than MaterialArtifact because rotors typically have removable subcomponents and require assembly. No domain-specific parent like 'MachineComponent' exists in the already-enriched classes, so Assembly is the most appropriate genus.
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| None | MaterialArtifact | hasComponentPartAtAllTimes |
The rotor shaft is the only universal component that all rotors must possess. Other components like blades, windings, or cages are specific to particular rotor types (turbine rotors, electrical rotors, cage rotors) and should be modeled at the subtype level.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
—
Outputs (O)
—
Transformation (T)
rotational mechanical energy transferred through rotating motion to enable machine operation
A rotor fundamentally transfers mechanical energy through rotation. It receives rotational energy from a driver (motor, engine) and transmits it to the machine's working elements (impeller, compressor stages, generator windings). This signature distinguishes rotors from non-rotating components and static assemblies.
5
Axiom Mode Decision
Necessary conditions only
— modelled as a primitive universal
(⊑, SubClassOf). Identity is grounded in designed
function and cannot be reduced to a property checklist.
As a constructive type defined by physical configuration (rotating portion with shaft), providing sufficient conditions under OWA could lead to overclassification. Complex assemblies containing rotating elements might be incorrectly classified as rotors rather than their proper categories (motors, compressors, etc.).
Cross-Standard Observations
Significant scope difference between sources: ISO 15926-4 treats rotor as a broad machine component class with many subtypes, while OnePetro focuses narrowly on drilling motor applications. The ISO standard provides much richer taxonomical structure.
