exported
equivalent
agitator
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Agitator
Generated on 2026-04-16
Natural Language Definition
EN
An agitator is a mixer that stirs or shakes fluids by reaction force from moving vanes.
PT-BR
Um agitador é um misturador que mexe ou agita fluidos por força de reação de palhetas móveis.
Formal Axioms
Semi-formal (Aristotelian)
Every agitator is a mixer that has the function to agitate fluids and has moving vanes as component parts at all times.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(Agitator(x) ↔ Mixer(x) ∧ ∃f(AgitationFunction(f) ∧ bearerOf(x,f)) ∧ ∃v(MovingVane(v) ∧ hasComponentPartAtAllTimes(x,v)))
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: Agitator
<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_0000409 rdf:type owl:Class ; # AgitationFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000410 # AgitationProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000410 # AgitationProcess
] ;
rdfs:label "agitation function"@en ;
rdfs:label "função de agitação"@pt-br .
### Process type
:COPI_0000410 rdf:type owl:Class ; # AgitationProcess
rdfs:subClassOf :COPI_0000003 ; # MomentumTransfer
rdfs:label "agitation process"@en ;
rdfs:label "processo de agitação"@pt-br .
:COPI_0000003 rdf:type owl:Class . # MomentumTransfer
:COPI_0000410 # AgitationProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: Agitator
:COPI_0000208 rdf:type owl:Class ; # Agitator
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000314 # Mixer
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000409 # AgitationFunction
]
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasComponentPartAtAllTimes ;
owl:someValuesFrom :COPI_0000583 # MovingVane
]
)
] ;
rdfs:label "agitator"@en ;
rdfs:label "agitador"@pt-br ;
iof-av:naturalLanguageDefinition "An agitator is a mixer that stirs or shakes fluids by reaction force from moving vanes."@en ;
skos:definition "An agitator is a mixer that stirs or shakes fluids by reaction force from moving vanes."@en ;
iof-av:naturalLanguageDefinition "Um agitador é um misturador que mexe ou agita fluidos por força de reação de palhetas móveis."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every agitator is a mixer that has the function to agitate fluids and has moving vanes as component parts at all times."@en ;
iof-av:firstOrderLogicAxiom "∀x(Agitator(x) ↔ Mixer(x) ∧ ∃f(AgitationFunction(f) ∧ bearerOf(x,f)) ∧ ∃v(MovingVane(v) ∧ hasComponentPartAtAllTimes(x,v)))"@en ;
skos:definition "[ISO 15926-4] An <AGITATOR> is a <DYNAMIC MIXER> that stirs or shakes fluids by reaction force from moving vanes"@en ;
skos:definition "[CFIHOS] A propeller like device with agitational or rotational movement located in a tank to prevent the content of the tank to build component segments."@en ;
skos:definition "[DEXPI] An Agitator is a dynamic mixer that stirs or shakes fluids by reaction force from moving vanes."@en .
:COPI_0000583 rdf:type owl:Class ; # MovingVane
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:label "palheta móvel"@pt-br ;
rdfs:label "moving vane"@en .
# Disjointness: Agitator and Centrifuge
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000208 :COPI_0000225 ) . # Agitator, Centrifuge
Axiomatization Decision Log
1
Identity-Giving Function
Function class
AgitationFunction
⊑ DesignedFunction
Realized in
AgitationProcess
⊑ MomentumTransfer
The identity-giving function is to stir or shake fluids through reaction force from moving vanes, which is a specific type of mixing operation distinct from static mixing or other mixing mechanisms.
2
Genus Determination
Mixer
The ISO 15926 definition explicitly states agitator is a 'DYNAMIC MIXER'. The already-enriched 'mixer' class (function: MixingFunction, genus: Assembly) is the most specific appropriate superclass. All parent candidates considered: DYNAMIC MIXER (not yet enriched), mixer (enriched), ProcessEquipment (too broad).
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| MovingVane | MaterialArtifact | hasComponentPartAtAllTimes |
These parts are essential for any agitator to perform its function - the vanes create the mixing action, the shaft transmits rotation, and the drive provides the motive power.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— to be agitated, typically in a tank or vessel
Outputs (O)
PortionOfFluid
— same fluid with enhanced mixing, homogenization, or suspension
Transformation (T)
mechanical energy transfer to create fluid motion and mixing through vane-induced agitation
Agitators transform mechanical rotational energy into fluid mixing energy, creating circulation patterns and preventing stratification or settling in the contained fluid.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Disjointness Axioms
Centrifuge
C4: Centrifuge. Static mixers have no moving parts (incompatible with moving vane requirement), centrifuges use centrifugal force rather than vane agitation for separation/mixing
Cross-Standard Observations
Consistent definition across all three sources emphasizing the dynamic mixing nature and moving vanes mechanism. CFIHOS adds detail about preventing component segments (stratification), while DEXPI and ISO 15926 use identical language about reaction force from moving vanes.
