exported
equivalent
fan
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Fan
Generated on 2026-04-13
Natural Language Definition
EN
A fan is an assembly that bears a gas movement function for delivering or exhausting volumes of vapor or gas at low differential pressure.
PT-BR
Um ventilador é um conjunto que possui uma função de movimentação de gás para fornecer ou exaurir volumes de vapor ou gás com baixa pressão diferencial.
Formal Axioms
Semi-formal (Aristotelian)
Every fan is an assembly that bears a gas movement function, and every assembly that bears a gas movement function is a fan.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(Fan(x) ↔ (Assembly(x) ∧ ∃f(GasMovementFunction(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: Fan
<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_0000191 rdf:type owl:Class ; # GasMovementFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000545 # GasMovementProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000545 # GasMovementProcess
] ;
rdfs:label "gas movement function"@en ;
rdfs:label "função de movimentação de gás"@pt-br .
### Process type
:COPI_0000545 rdf:type owl:Class ; # GasMovementProcess
rdfs:subClassOf :COPI_0000003 ; # MomentumTransfer
rdfs:label "gas movement process"@en ;
rdfs:label "processo de movimentação de gás"@pt-br .
:COPI_0000003 rdf:type owl:Class . # MomentumTransfer
:COPI_0000545 # GasMovementProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000039 # PortionOfGas
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000039 # PortionOfGas
] .
### Equipment universal: Fan
:COPI_0000115 rdf:type owl:Class ; # Fan
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
iof-core:Assembly
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000191 # GasMovementFunction
]
)
] ;
rdfs:label "fan"@en ;
rdfs:label "ventilador"@pt-br ;
iof-av:naturalLanguageDefinition "A fan is an assembly that bears a gas movement function for delivering or exhausting volumes of vapor or gas at low differential pressure."@en ;
skos:definition "A fan is an assembly that bears a gas movement function for delivering or exhausting volumes of vapor or gas at low differential pressure."@en ;
iof-av:naturalLanguageDefinition "Um ventilador é um conjunto que possui uma função de movimentação de gás para fornecer ou exaurir volumes de vapor ou gás com baixa pressão diferencial."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every fan is an assembly that bears a gas movement function, and every assembly that bears a gas movement function is a fan."@en ;
iof-av:firstOrderLogicAxiom "∀x(Fan(x) ↔ (Assembly(x) ∧ ∃f(GasMovementFunction(f) ∧ bearerOf(x,f))))"@en ;
skos:definition "[ISO 15926-4] A <FAN> is a <FunctionalObject> that is capable of <DELIVERING> or <EXHAUSTING> volumes of vapour or gas at low differential pressure"@en ;
skos:definition "[CFIHOS] A physical object that is intended to deliver or exhaust volumes of vapour or gas at low differential pressure."@en ;
skos:definition "[POSC Caesar] An 'artefact' and a 'gas pressure increase device' that is intended to deliver or exhaust volumes of vapour or gas at low differential pressure."@en .
# Disjointness: Fan and Pump
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000115 :COPI_0000072 ) . # Fan, Pump
# Disjointness: Fan and Compressor
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000115 :COPI_0000073 ) . # Fan, Compressor
Axiomatization Decision Log
1
Identity-Giving Function
Function class
GasMovementFunction
⊑ DesignedFunction
Realized in
GasMovementProcess
⊑ MomentumTransfer
The identity-giving function is moving gas/vapor volumes at low differential pressure. This distinguishes fans from compressors (high pressure) and from pumps (liquids). All definitions converge on this low-pressure gas movement capability.
2
Genus Determination
Assembly
bfo:Object (BFO_0000030)
Causally unified material artefact composed of physically connected,
separable MaterialComponent parts. Satisfies
Assembly ⊑ MaterialArtifact ⊑ bfo:Object.
No domain-specific superclass like 'GasMovementEquipment' exists in the parent_candidates or enriched classes. Fans are causally unified rotating machinery with removable subcomponents (impeller, housing, motor, bearings) that can be assembled/disassembled while maintaining single-unit identity for maintenance purposes.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These three components are universal across all fan types - axial, radial, centrifugal all require an impeller, housing, and shaft. Drive mechanism varies (electric motor, engine, etc.) so not included at this level.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfGas
— at atmospheric or low pressure
Outputs (O)
PortionOfGas
— with added kinetic energy and slight pressure increase
Transformation (T)
mechanical energy added to gas stream with low pressure differential
Fans take in gas at one location and discharge it at another with added energy but characteristically low pressure rise, distinguishing from compressors.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Disjointness Axioms
Pump
Compressor
C2: Pump, Compressor. Process signatures are incompatible: fans handle gases at low pressure, pumps handle liquids, compressors provide high pressure ratios. These represent different equipment categories with incompatible operational signatures.
Cross-Standard Observations
All three sources (ISO 15926, CFIHOS, POSC Caesar) align closely on the functional definition emphasizing low differential pressure gas movement. POSC Caesar explicitly mentions 'gas pressure increase device' which confirms the pressure-adding aspect. The consistency across sources supports the functional classification basis.
