exported
necessary
input shaft
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Inputshaft
Generated on 2026-05-04
Natural Language Definition
EN
An input shaft is a shaft that serves as the entrance point for mechanical energy from an external energy source in a power transmission system.
PT-BR
Um eixo de entrada é um eixo que serve como ponto de entrada para energia mecânica de uma fonte de energia externa em um sistema de transmissão de potência.
Formal Axioms
Semi-formal (Aristotelian)
An InputShaft is a Shaft that participates in mechanical energy reception and is connected to an external energy source.
First-Order Logic Theory
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▸ Stored override
∀x(InputShaft(x) → Shaft(x) ∧ ∃p(MechanicalEnergyReceptionProcess(p) ∧ participatesIn(x,p)) ∧ ∃s(ExternalEnergySource(s) ∧ connectedTo(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: InputShaft
<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 "2026-10-07"^^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 transmitting mechanical energy from an external energy source through rotational motion to downstream mechanical components."@en ;
skos:definition "A DesignedFunction that is realized in a PowerTransmissionProcess and that consists in transmitting mechanical energy from an external energy source through rotational motion to downstream mechanical components."@en .
### 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 from an external energy source through a rotating shaft to downstream mechanical components, enabling power transfer within a mechanical system."@en ;
skos:definition "A PlannedProcess in which mechanical energy is transmitted from an external energy source through a rotating shaft to downstream mechanical components, enabling power transfer within a mechanical system."@en .
### Equipment universal: InputShaft
:COPI_0000306 rdf:type owl:Class ; # InputShaft
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 "input shaft"@en ;
rdfs:label "eixo de entrada"@pt-br ;
iof-av:naturalLanguageDefinition "An input shaft is a shaft that serves as the entrance point for mechanical energy from an external energy source in a power transmission system."@en ;
skos:definition "An input shaft is a shaft that serves as the entrance point for mechanical energy from an external energy source in a power transmission system."@en ;
iof-av:naturalLanguageDefinition "Um eixo de entrada é um eixo que serve como ponto de entrada para energia mecânica de uma fonte de energia externa em um sistema de transmissão de potência."@pt-br ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive type based on physical configuration as energy entrance point. Under OWA, defining sufficient conditions could lead to false positives where any shaft receiving external energy input would be classified as a standard input shaft, even specialized or hybrid configurations that should remain in different maintenance categories."@en ;
rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000196 ; owl:someValuesFrom :COPI_0000059 ] ;
skos:definition "[ISO 15926-4] An <INPUT SHAFT> is a <SHAFT> that is the entrance of mechanical energy and driven by an external energy source."@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
PowerTransmissionFunction
⊑ DesignedFunction
Realized in
PowerTransmissionProcess
⊑ PlannedProcess
The generic function of a shaft is power transmission - converting and transmitting mechanical energy through rotation. While this input shaft has the specific role of being the entrance point, it shares the fundamental power transmission function with all shafts.
2
Genus Determination
Shaft
The definition explicitly states this is a subtype of SHAFT. While Shaft is not yet enriched in our ontology, it is the most specific appropriate superclass. Shaft would ultimately fall under Assembly as it is a mechanical component that transmits power through connected parts.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
No component terms are available in the known component terms list, and the source definition does not specify internal parts beyond the basic shaft structure inherited from the genus. The specific internal components of an input shaft would vary by application and implementation.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
—
Outputs (O)
—
Transformation (T)
mechanical energy received from external source and transmitted through rotation to downstream mechanical components
The signature reflects the shaft's role as the mechanical energy entrance point - receiving rotational power from an external source and transmitting it onwards. This grounds disjointness from other equipment that processes different energy types or performs different transformations.
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 physical configuration as energy entrance point. Under OWA, defining sufficient conditions could lead to false positives where any shaft receiving external energy input would be classified as a standard input shaft, even specialized or hybrid configurations that should remain in different maintenance categories.
Cross-Standard Observations
Only one source provides definition. Limited context for identifying potential cross-standard divergences.
