exported
necessary
output shaft
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Outputshaft
Generated on 2026-05-04
Natural Language Definition
EN
A Shaft that participates in mechanical energy output processes, serving as the exit point for mechanical energy transmission from a prime mover to external energy consuming equipment.
PT-BR
Um Eixo que participa em processos de saída de energia mecânica, servindo como ponto de saída para transmissão de energia mecânica de um motor primário para equipamentos consumidores de energia externos.
Formal Axioms
Semi-formal (Aristotelian)
Every output shaft is a shaft that participates in at least one mechanical energy output process and bears a power transmission function.
First-Order Logic Theory
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▸ Stored override
∀x (OutputShaft(x) → Shaft(x) ∧ ∃p (MechanicalEnergyOutputProcess(p) ∧ participatesIn(x,p)) ∧ ∃f (PowerTransmissionFunction(f) ∧ bearerOf(x,f)))
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: OutputShaft
<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 "2026-10-09"^^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_0000192 rdf:type owl:Class ; # PowerTransmissionFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000604 # PowerTransmissionProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000604 # PowerTransmissionProcess
] ;
rdfs:label "power transmission function"@en ;
rdfs:label "função de transmissão de potência"@pt-br ;
iof-av:naturalLanguageDefinition "A DesignedFunction that is realized in a PowerTransmissionProcess and that consists in the capacity to transmit mechanical energy from a prime mover through rotational motion or to generate energy when acting as a driven element."@en ;
skos:definition "A DesignedFunction that is realized in a PowerTransmissionProcess and that consists in the capacity to transmit mechanical energy from a prime mover through rotational motion or to generate energy when acting as a driven element."@en ;
iof-av:naturalLanguageDefinition "Uma DesignedFunction que é realizada em um PowerTransmissionProcess e que consiste na capacidade de transmitir energia mecânica de um acionador por movimento rotativo, ou de gerar energia quando atua como elemento acionado."@pt-br .
### Process type
:COPI_0000604 rdf:type owl:Class ; # PowerTransmissionProcess
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "power transmission process"@en ;
rdfs:label "processo de transmissão de potência"@pt-br ;
iof-av:naturalLanguageDefinition "A PlannedProcess in which mechanical energy is transmitted through rotational motion from one component to another via a rotating shaft, enabling the transfer of torque and angular velocity to mounted components."@en ;
skos:definition "A PlannedProcess in which mechanical energy is transmitted through rotational motion from one component to another via a rotating shaft, enabling the transfer of torque and angular velocity to mounted components."@en ;
iof-av:naturalLanguageDefinition "Um PlannedProcess em que energia mecânica é transmitida por movimento rotativo de um componente a outro por meio de um eixo, permitindo a transferência de torque e velocidade angular aos componentes montados."@pt-br .
### Equipment universal: OutputShaft
:COPI_0000317 rdf:type owl:Class ; # OutputShaft
rdfs:subClassOf :COPI_0000346 ; # Shaft
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000192 # PowerTransmissionFunction
] ;
rdfs:label "output shaft"@en ;
rdfs:label "eixo de saída"@pt-br ;
iof-av:naturalLanguageDefinition "A Shaft that participates in mechanical energy output processes, serving as the exit point for mechanical energy transmission from a prime mover to external energy consuming equipment."@en ;
skos:definition "A Shaft that participates in mechanical energy output processes, serving as the exit point for mechanical energy transmission from a prime mover to external energy consuming equipment."@en ;
iof-av:naturalLanguageDefinition "Um Eixo que participa em processos de saída de energia mecânica, servindo como ponto de saída para transmissão de energia mecânica de um motor primário para equipamentos consumidores de energia externos."@pt-br ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive type based on positional role within mechanical systems. Under OWA, sufficient conditions would be difficult to specify without risk of misclassifying intermediate shafts or complex multi-shaft arrangements that happen to have output characteristics."@en ;
rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000196 ; owl:someValuesFrom :COPI_0000059 ] ;
dcterms:source <https://standards.iso.org/iso/15926/-4/reference-data-item/OUTPUT_SHAFT> .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
PowerTransmissionFunction
⊑ DesignedFunction
Realized in
PowerTransmissionProcess
⊑ PlannedProcess
While PowerTransmissionFunction already exists in the ontology (gearbox uses it), output shafts share this same fundamental function - they transmit mechanical power. The differentia for output shaft is not functional but positional/directional (being the exit point rather than having a unique transmission mechanism).
2
Genus Determination
Shaft
The ISO 15926 definition explicitly states 'An <OUTPUT SHAFT> is a <SHAFT>' making Shaft the direct genus. No parent_candidates were provided, but Shaft is the obvious superclass. A shaft is a single mechanical component (not an assembly of removable parts), making it a MaterialArtifact rather than an Assembly.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
No component terms were provided in the Known Component Terms list, and the ISO definition does not specify internal parts. Shafts can have various features (keyways, splines, bearings seats) but these vary by application and are not universal to all output shafts.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
—
Outputs (O)
—
Transformation (T)
mechanical energy transmitted from internal system components to external driven equipment
Output shafts receive mechanical power from internal components (engines, motors, gearboxes) and transmit it to external loads. The transformation is pure transmission without modification of the energy form.
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.
Constructive type based on positional role within mechanical systems. Under OWA, sufficient conditions would be difficult to specify without risk of misclassifying intermediate shafts or complex multi-shaft arrangements that happen to have output characteristics.
Cross-Standard Observations
Only one source (ISO 15926) provides a definition. No cross-standard comparison possible.
