exported
equivalent
gravity separator
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Gravityseparator
Generated on 2026-04-16
Natural Language Definition
EN
A gravity separator is a separator that performs separation based on differences in specific gravity of the substances being separated.
PT-BR
Um separador gravitacional é um separador que realiza separação baseada nas diferenças de gravidade específica das substâncias sendo separadas.
Formal Axioms
Semi-formal (Aristotelian)
Every gravity separator is a separator that bears a GravitySeparationFunction
First-Order Logic Theory
Loading…
▸ Stored override
∀x(GravitySeparator(x) ↔ Separator(x) ∧ ∃f(GravitySeparationFunction(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: GravitySeparator
<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_0000546 rdf:type owl:Class ; # GravitySeparationFunction
rdfs:subClassOf :COPI_0000195 ; # SeparationFunction
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000547 # GravitySeparationProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000547 # GravitySeparationProcess
] ;
rdfs:label "gravity separation function"@en ;
rdfs:label "função de separação gravitacional"@pt-br .
:COPI_0000195 rdf:type owl:Class . # SeparationFunction
### Process type
:COPI_0000547 rdf:type owl:Class ; # GravitySeparationProcess
rdfs:subClassOf :COPI_0000635 ; # SeparationProcess
rdfs:label "gravity separation process"@en ;
rdfs:label "processo de separação gravitacional"@pt-br .
:COPI_0000635 rdf:type owl:Class . # SeparationProcess
:COPI_0000547 # GravitySeparationProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000044 # FluidMixture
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: GravitySeparator
:COPI_0000292 rdf:type owl:Class ; # GravitySeparator
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000084 # Separator
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000546 # GravitySeparationFunction
]
)
] ;
rdfs:label "gravity separator"@en ;
rdfs:label "separador gravitacional"@pt-br ;
iof-av:naturalLanguageDefinition "A gravity separator is a separator that performs separation based on differences in specific gravity of the substances being separated."@en ;
skos:definition "A gravity separator is a separator that performs separation based on differences in specific gravity of the substances being separated."@en ;
iof-av:naturalLanguageDefinition "Um separador gravitacional é um separador que realiza separação baseada nas diferenças de gravidade específica das substâncias sendo separadas."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every gravity separator is a separator that bears a GravitySeparationFunction"@en ;
iof-av:firstOrderLogicAxiom "∀x(GravitySeparator(x) ↔ Separator(x) ∧ ∃f(GravitySeparationFunction(f) ∧ bearerOf(x,f)))"@en ;
skos:definition "[ISO 15926-4] A <GRAVITY SEPARATOR> is an <ARTEFACT> and a <FLUID SEPARATOR> that is based on the difference in specific gravity for the substances to be separated"@en ;
skos:definition "[CFIHOS] A separator that is based on the difference in specific gravity for the substances to be separated."@en ;
skos:definition "[POSC Caesar] A separator that is based on the difference in specific gravity for the substances to be separated."@en .
# Disjointness: GravitySeparator and Centrifuge
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000292 :COPI_0000225 ) . # GravitySeparator, Centrifuge
# Disjointness: GravitySeparator and Hydrocyclone
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000292 :COPI_0000301 ) . # GravitySeparator, Hydrocyclone
Axiomatization Decision Log
1
Identity-Giving Function
Function class
GravitySeparationFunction
⊑ SeparationFunction
Realized in
GravitySeparationProcess
⊑ SeparationProcess
The identity-giving function is gravity-based separation - the designed capability to separate substances based on differences in specific gravity. This is a specialization of the general SeparationFunction already used by the separator class.
2
Genus Determination
Separator
From parent_candidates, 'separator' is the most specific and appropriate superclass. It is already enriched in our ontology with function SeparationFunction and genus Vessel. The other candidates (FLUID SEPARATOR, Static Equipment, ARTEFACT) are either too broad or represent lateral categories. A gravity separator is clearly a subtype of separator.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These are the minimal necessary parts for any gravity separator. More specific parts like baffles, weirs, or distribution systems would be subtype-specific and not universal to all gravity separators.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
FluidMixture
— multi-phase with components of different specific gravities
Outputs (O)
PortionOfFluid
— separated phases with distinct specific gravities
Transformation (T)
gravitational separation based on density differences
Gravity separators take a multi-phase fluid mixture and output separate streams of different phases, using gravitational force to exploit density differences. The number of outputs depends on the number of phases being separated.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Disjointness Axioms
centrifuge
hydrocyclone
C1: centrifuge. C2: hydrocyclone. Gravity separators use gravitational force while centrifuges use centrifugal force and hydrocyclones use cyclonic action. These represent fundamentally different separation mechanisms that are mutually exclusive.
Cross-Standard Observations
All three sources provide consistent definitions focusing on the gravity-based separation principle. The ISO15926 source explicitly positions it as both an ARTEFACT and FLUID SEPARATOR, confirming the taxonomic placement. No significant mismatches observed.