exported
necessary
gasket
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Gasket
Generated on 2026-04-15
Natural Language Definition
EN
A gasket is a material artifact made of deformable material arranged in closed loops that bears a sealing function to prevent leakage between mating surfaces with limited relative movement.
PT-BR
Uma junta é um artefato material feito de material deformável arranjado em loops fechados que possui uma função de vedação para prevenir vazamentos entre superfícies de acoplamento com movimento relativo limitado.
Formal Axioms
Semi-formal (Aristotelian)
Every gasket is a material artifact that has component part some deformable material and bears some sealing function and has property some closed loop geometry.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(Gasket(x) ↔ MaterialArtifact(x) ∧ ∃f(SealingFunction(f) ∧ bearerOf(x,f)) ∧ ∃m(DeformableMaterial(m) ∧ hasComponentPartAtAllTimes(x,m)) ∧ ∃g(ClosedLoopGeometry(g) ∧ hasProperty(x,g)))
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: Gasket
<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_0000630 rdf:type owl:Class ; # SealingFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000631 # SealingProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000631 # SealingProcess
] ;
rdfs:label "sealing function"@en ;
rdfs:label "função de vedação"@pt-br .
### Process type
:COPI_0000631 rdf:type owl:Class ; # SealingProcess
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "sealing process"@en ;
rdfs:label "processo de vedação"@pt-br .
:COPI_0000631 # SealingProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000037 # MatingSurface
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # SealedJoint
] .
### Equipment universal: Gasket
:COPI_0000287 rdf:type owl:Class ; # Gasket
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000630 # SealingFunction
] ;
rdfs:label "gasket"@en ;
rdfs:label "junta"@pt-br ;
iof-av:naturalLanguageDefinition "A gasket is a material artifact made of deformable material arranged in closed loops that bears a sealing function to prevent leakage between mating surfaces with limited relative movement."@en ;
skos:definition "A gasket is a material artifact made of deformable material arranged in closed loops that bears a sealing function to prevent leakage between mating surfaces with limited relative movement."@en ;
iof-av:naturalLanguageDefinition "Uma junta é um artefato material feito de material deformável arranjado em loops fechados que possui uma função de vedação para prevenir vazamentos entre superfícies de acoplamento com movimento relativo limitado."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every gasket is a material artifact that has component part some deformable material and bears some sealing function and has property some closed loop geometry."@en ;
iof-av:firstOrderLogicAxiom "∀x(Gasket(x) ↔ MaterialArtifact(x) ∧ ∃f(SealingFunction(f) ∧ bearerOf(x,f)) ∧ ∃m(DeformableMaterial(m) ∧ hasComponentPartAtAllTimes(x,m)) ∧ ∃g(ClosedLoopGeometry(g) ∧ hasProperty(x,g)))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive basis (CLAUDE.md): the definition constrains material and geometry — deformable material arranged in closed loops — not function alone. As equivalent it made MaterialArtifact + SealingFunction sufficient for gasket-hood, so every sealing artifact was inferred to be a gasket. Those constructive conditions live only in differentia_expression and do not reach the OWL, so equivalence asserted far more than intended."@en ;
skos:definition "[ISO 15926-4] A <GASKET> is an <ARTEFACT> and a <SEAL> that is one or more closed loops of deformable material used between mating surfaces which have only very limited movement relative to each other"@en ;
skos:definition "[CFIHOS] A seal that is one or more closed loops of deformable material used between mating surfaces which have only very limited movement relative to each other."@en ;
skos:definition "[OnePetro] Any of several replaceable seals in equipment or tools."@en ;
skos:definition "[POSC Caesar] A seal that is one or more closed loops of deformable material used between mating surfaces which have only very limited movement relative to each other."@en .
# Disjointness: Gasket and Valve
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000287 :COPI_0000077 ) . # Gasket, Valve
# Disjointness: Gasket and Pump
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000287 :COPI_0000072 ) . # Gasket, Pump
# Disjointness: Gasket and Compressor
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000287 :COPI_0000073 ) . # Gasket, Compressor
Axiomatization Decision Log
1
Identity-Giving Function
Function class
SealingFunction
⊑ DesignedFunction
Realized in
SealingProcess
⊑ PlannedProcess
The identity-giving function is sealing - preventing fluid or gas leakage between mating surfaces. All definitions consistently emphasize this sealing capability as the fundamental purpose that makes a gasket a gasket.
2
Genus Determination
MaterialArtifact
bfo:Object (BFO_0000030)
Monolithic causally unified material artefact.
MaterialArtifact ≡ Object ⊓ ∃bearerOf.DesignedFunction.
No domain-specific superclass exists in the already-enriched classes. While ISO 15926 suggests 'SEAL' as a parent, this generic seal category is not yet defined in our ontology. Gaskets are typically monolithic deformable components (not assemblies with removable parts), making MaterialArtifact the appropriate BFO root.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
Gaskets are typically monolithic components made entirely of deformable material. More specific part requirements (metal jackets, fillers, etc.) vary by subtype and should be modeled at those levels.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
MatingSurface
— limited relative movement
Outputs (O)
SealedJoint
— leak-tight connection
Transformation (T)
geometric deformation to fill surface irregularities and create leak barrier
Gaskets transform the geometry of a joint by deforming under compression to fill gaps and create a continuous seal barrier between two mating surfaces.
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 basis (CLAUDE.md): the definition constrains material and geometry — deformable material arranged in closed loops — not function alone. As equivalent it made MaterialArtifact + SealingFunction sufficient for gasket-hood, so every sealing artifact was inferred to be a gasket. Those constructive conditions live only in differentia_expression and do not reach the OWL, so equivalence asserted far more than intended.
Disjointness Axioms
Valve
Pump
Compressor
C4: Valve, Pump, Compressor. Gaskets are passive sealing components that undergo geometric deformation, incompatible with active flow control, pumping, compression, or powered sealing mechanisms.
Cross-Standard Observations
All sources consistently emphasize the sealing function and closed-loop deformable material construction. ISO 15926 provides the most comprehensive definition including the key constraint about 'very limited movement relative to each other' which distinguishes gaskets from dynamic seals. OnePetro provides a broader but less precise definition.
