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validated necessary COPI_0000762
Pipe Cap
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000762
Generated onGerado em 2026-09-08
Natural Language DefinitionDefinição em Linguagem Natural
EN
A pipe cap is a cap that fits on or over the outside of a pipe end, not inside it, to close it off.
PT-BR
Uma tampa de tubo e uma tampa que se encaixa sobre a parte externa de uma extremidade de tubo, nao por dentro, para fecha-la.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every pipe cap is a cap that bears a closure function and has an over-fit relation quality, fitting on or over the outside of a pipe end.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Necessary condition]∀x (PipeCap(x) → Cap(x) ∧ ∃f (ClosureFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function [Function axiom: ClosureFunction]∀f (ClosureFunction(f) → ∀p (realizedIn(f,p) → ClosureProcess(p)) ∧ ∃p (ClosureProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Structural differentia (necessary only)]∀x (PipeCap(x) → ∃bearerOf.ClosureFunction ⊓ ∃hasQuality.OverFitRelation) — Step 3: structural property — necessary condition, not sufficient (OWA prevents ≡) [Process participation signature]∀x ∀f ((PipeCap(x) ∧ ClosureFunction(f) ∧ bearerOf(x,f)) → processType(f,Containment)) — Step 5: typed participants in the realising process
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: PipeCap <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 :ClosureFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :ClosureProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :ClosureProcess ] ; rdfs:label "closure function"@en ; iof-av:naturalLanguageDefinition "A DesignedFunction that is realized in a ClosureProcess and that consists in covering or capping the top or end of an artefact, protecting or sealing it from the surrounding environment."@en ; skos:definition "A DesignedFunction that is realized in a ClosureProcess and that consists in covering or capping the top or end of an artefact, protecting or sealing it from the surrounding environment."@en . ### Process type :ClosureProcess rdf:type owl:Class ; rdfs:subClassOf :MaterialContainment ; rdfs:label "closure process"@en ; iof-av:naturalLanguageDefinition "A PlannedProcess in which a cap is fitted over a pipe end, on or over its outside surface (not inserted inside it), closing it off."@en ; skos:definition "A PlannedProcess in which a cap is fitted over a pipe end, on or over its outside surface (not inserted inside it), closing it off."@en . :MaterialContainment rdf:type owl:Class . ### Equipment universal: PipeCap :PipeCap rdf:type owl:Class ; rdfs:subClassOf :Cap ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :ClosureFunction ] ; rdfs:label "pipe cap"@en ; iof-av:naturalLanguageDefinition "A pipe cap is a cap that fits on or over the outside of a pipe end, not inside it, to close it off."@en ; skos:definition "A pipe cap is a cap that fits on or over the outside of a pipe end, not inside it, to close it off."@en ; iof-av:naturalLanguageDefinition "Uma tampa de tubo e uma tampa que se encaixa sobre a parte externa de uma extremidade de tubo, nao por dentro, para fecha-la."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every pipe cap is a cap that bears a closure function and has an over-fit relation quality, fitting on or over the outside of a pipe end."@en ; iof-av:firstOrderLogicAxiom "∀x (PipeCap(x) → Cap(x) ∧ ∃f (ClosureFunction(f) ∧ bearerOf(x,f)) ∧ ∃q (OverFitRelation(q) ∧ hasQuality(x,q)))"@en ; iof-av:isPrimitive "true"^^xsd:boolean ; iof-av:primitiveRationale "Constructive subtype reusing genus and function unchanged: sufficiency is not asserted so that a cap-like covering for a non-pipe artefact is not automatically classified as a pipe cap under OWA."@en ; skos:altLabel "quick connection cap"@en ;
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
ClosureFunction ⊑ DesignedFunction
Realized in
ClosureProcess ⊑ MaterialContainment
Reused verbatim from the already-enriched genus 'cap' per the constructive-type rule.
2 Genus DeterminationDeterminação do Gênero
Capbfo:Object (BFO_0000030)
Both cross-source definitions (iso15926, posc_caesar) name PIPING COMPONENT / Artefact generically, but the concept is exactly a pipe-specific specialization of the already-enriched genus Cap ('a hood or covering for the top or end of something'), narrowed to pipe ends with a specific fitting relation.
3 Differentia SpecificaDiferença Específica
∃bearerOf.ClosureFunction ⊓ ∃hasQuality.OverFitRelation

Fits on or over the outside of a pipe end (not inside it) to close it off -- distinguishing it from a plug, which is inserted inside the pipe end.

The 'fitting on or over (but not inside)' relation is the one additional condition beyond the genus's closure function, verbatim from both cross-source primary definitions; modeled as a quality since it describes a spatial fitting relation of the single cap body, not a separable part.
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

No separable component distinguishes a pipe cap from the genus Cap; the differentia is a fitting-relation quality (see Step 3).
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
—
OutputsSaídas
—
TransformationTransformação
no fluid participants -- the cap closes off an open pipe end from the outside, a passive protective/sealing role
Same passive-closure signature as the genus Cap.
MetadataMetadados
COPI IDCOPI IDCOPI_0000762
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000762
StatusStatusvalidated
Axiom modeModonecessary
CreatedCriado2026-09-08
UpdatedAtualizado2026-09-10
LLM modelModelo LLMclaude-sonnet-5
VersionVersão2026-10-08
Quick factsDados rápidos
GenusGêneroCap
Root classClasse raizMaterialArtifact
Axiom modeModonecessary
FunctionFunçãoClosureFunction
ProcessProcessoClosureProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 2 sources
ISO 15926-4 PIPE CAP
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
POSC Caesar Pipe Cap
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
Provenance tiersCamadas de proveniência secondary: none
?
How much independent secondary research backs this term — not how correct it is. "Full" means a non-primary source was quoted directly and covered several distinct aspects of the concept, not just its function. "Partial" means secondary research happened but covered less. "None" means only the primary definition was used. A "full" term can still contain an error, and a "none" term can still be entirely correct — this tracks whether the research step ran, not the result.Quanto de pesquisa secundária independente sustenta este termo — não o quão correto ele é. "Full" significa que uma fonte não-primária foi citada literalmente e cobriu vários aspectos distintos do conceito, não apenas sua função. "Partial" significa que houve pesquisa secundária, mas com cobertura menor. "None" significa que só a definição primária foi usada. Um termo "full" ainda pode conter um erro, e um termo "none" ainda pode estar totalmente correto — isso rastreia se a etapa de pesquisa ocorreu, não o resultado.
primarystandardverbatimiso15926[mechanism, function]
A <PIPE CAP> is a <PIPING COMPONENT> that is intended to provide closure of a pipe end by having it fitting on or over (but not inside) the end
primarystandardverbatimposc_caesar[mechanism, function]
An 'artefact' that is intended to provide closure of a pipe end by having it fitting on or over (but not inside) the end.

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