exported
necessary
seat
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Seat
Generated on 2026-05-04
Natural Language Definition
EN
A MaterialArtifact that has a sealing surface component and participates in valve closing processes, consisting in that part of a valve against which the closure element bears to provide tight shutoff.
PT-BR
Um MaterialArtifact que possui um componente de superfície de vedação e participa em processos de fechamento de válvulas, consistindo na parte da válvula contra a qual o elemento de fechamento se apoia para proporcionar vedação hermética.
Formal Axioms
Semi-formal (Aristotelian)
Every Seat is a MaterialArtifact that has some sealing surface component at all times and participates in some valve closing process.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(Seat(x) → MaterialArtifact(x) ∧ ∃y(SealingSurface(y) ∧ hasComponentPartAtAllTimes(x,y)) ∧ ∃z(ValveClosingProcess(z) ∧ participatesIn(x,z)))
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: Seat
<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 ;
iof-av:naturalLanguageDefinition "A DesignedFunction that is realized in a SealingProcess and that consists in providing a tight interface against which a closure element bears to prevent fluid leakage through a valve."@en ;
skos:definition "A DesignedFunction that is realized in a SealingProcess and that consists in providing a tight interface against which a closure element bears to prevent fluid leakage through a valve."@en .
### 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 ;
iof-av:naturalLanguageDefinition "A PlannedProcess in which a valve seat provides a sealing interface for a closure element (gate, ball, disc) to bear against, preventing fluid passage when the valve is closed."@en ;
skos:definition "A PlannedProcess in which a valve seat provides a sealing interface for a closure element (gate, ball, disc) to bear against, preventing fluid passage when the valve is closed."@en .
:COPI_0000631 # SealingProcess
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: Seat
:COPI_0000371 rdf:type owl:Class ; # Seat
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 "seat"@en ;
rdfs:label "assento"@pt-br ;
iof-av:naturalLanguageDefinition "A MaterialArtifact that has a sealing surface component and participates in valve closing processes, consisting in that part of a valve against which the closure element bears to provide tight shutoff."@en ;
skos:definition "A MaterialArtifact that has a sealing surface component and participates in valve closing processes, consisting in that part of a valve against which the closure element bears to provide tight shutoff."@en ;
iof-av:naturalLanguageDefinition "Um MaterialArtifact que possui um componente de superfície de vedação e participa em processos de fechamento de válvulas, consistindo na parte da válvula contra a qual o elemento de fechamento se apoia para proporcionar vedação hermética."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every Seat is a MaterialArtifact that has some sealing surface component at all times and participates in some valve closing process."@en ;
iof-av:firstOrderLogicAxiom "∀x(Seat(x) → MaterialArtifact(x) ∧ ∃y(SealingSurface(y) ∧ hasComponentPartAtAllTimes(x,y)) ∧ ∃z(ValveClosingProcess(z) ∧ participatesIn(x,z)))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive type based on physical configuration. Under OWA, sufficient conditions for 'seat' based solely on structural properties could lead to false positives where other valve components with sealing surfaces are incorrectly classified as seats."@en ;
skos:definition "[SLB Glossary] That part of a valve against which the closure element (gate, ball) affects a tight shutoff."@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
SealingFunction
⊑ DesignedFunction
Realized in
SealingProcess
⊑ PlannedProcess
The seat's identity-giving function is sealing - it provides the critical interface that enables tight shutoff when the closure element contacts it. This is the generic sealing function shared by all valve seats.
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. A seat is a discrete valve component that is a designed artifact but not a complex assembly with removable subcomponents. It falls directly under MaterialArtifact as a causally unified object designed for a specific function.
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| None | MaterialArtifact | hasComponentPartAtAllTimes |
The sealing surface is the only universally necessary part of any valve seat. Other components like gaskets or inserts are subtype-specific variations. No terms in the provided list match the basic sealing surface concept.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— fluid attempting to pass through valve when closure element is engaged
Outputs (O)
PortionOfFluid
— fluid flow blocked or sealed when closure element properly contacts seat
Transformation (T)
provides bearing surface for closure element contact to prevent fluid passage through valve
The seat enables the valve's primary sealing function by providing the interface against which the closure element bears. Input is fluid that would otherwise pass through; output is the same fluid stream blocked by the seat-closure element interface.
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. Under OWA, sufficient conditions for 'seat' based solely on structural properties could lead to false positives where other valve components with sealing surfaces are incorrectly classified as seats.
Cross-Standard Observations
Only one source definition available. No cross-standard comparison possible.
