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validated equivalent COPI_0000782
Siphon
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000782
Generated onGerado em 2026-09-08
Natural Language DefinitionDefinição em Linguagem Natural
EN
A siphon is a pipe that bears a siphonic transfer function: once primed, it conveys liquid upward from a reservoir over a crest and down to a lower discharge point, sustained by atmospheric pressure and gravity without continuous external power.
PT-BR
Um sifao e um tubo que possui uma funcao de transferencia sifonica: uma vez escorvado, conduz liquido para cima de um reservatorio sobre uma crista e para baixo ate um ponto de descarga mais baixo, sustentado por pressao atmosferica e gravidade sem energia externa continua.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every siphon is a pipe that bears a siphonic transfer function, and conversely.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Definition]∀x (Siphon(x) ↔ Pipe(x) ∧ ∃f (SiphonicTransferFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function [Function axiom: SiphonicTransferFunction]∀f (SiphonicTransferFunction(f) → ∀p (realizedIn(f,p) → SiphonicTransferProcess(p)) ∧ ∃p (SiphonicTransferProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Process participation signature]∀x ∀f ((Siphon(x) ∧ SiphonicTransferFunction(f) ∧ bearerOf(x,f)) → ∃m (PortionOfLiquid(m) ∧ participatesIn(m,f)) ∧ ∃e (PortionOfLiquid(e) ∧ participatesIn(e,f)) ∧ processType(f,FluidTransport)) — 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: Siphon <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 :SiphonicTransferFunction rdf:type owl:Class ; rdfs:subClassOf :FluidConductionFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :SiphonicTransferProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :SiphonicTransferProcess ] ; rdfs:label "siphonic transfer function"@en ; iof-av:naturalLanguageDefinition "A FlowControlFunction subtype (specializing FluidConductionFunction) that is realized in a SiphonicTransferProcess and that consists in conveying liquid from a reservoir up over a crest and down to a lower discharge point, sustained by atmospheric pressure and gravity once the tube is primed, without continuous external power input."@en ; skos:definition "A FlowControlFunction subtype (specializing FluidConductionFunction) that is realized in a SiphonicTransferProcess and that consists in conveying liquid from a reservoir up over a crest and down to a lower discharge point, sustained by atmospheric pressure and gravity once the tube is primed, without continuous external power input."@en . :FluidConductionFunction rdf:type owl:Class . ### Process type :SiphonicTransferProcess rdf:type owl:Class ; rdfs:subClassOf :MomentumTransfer ; rdfs:label "siphonic transfer process"@en ; iof-av:naturalLanguageDefinition "A PlannedProcess in which a primed column of liquid in a tube is driven from a source reservoir, over a crest above the source's free surface, and down to a discharge point below it, by the head difference between the tube's two legs and atmospheric pressure acting on the source surface."@en ; skos:definition "A PlannedProcess in which a primed column of liquid in a tube is driven from a source reservoir, over a crest above the source's free surface, and down to a discharge point below it, by the head difference between the tube's two legs and atmospheric pressure acting on the source surface."@en . :MomentumTransfer rdf:type owl:Class . :SiphonicTransferProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :PortionOfLiquid ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :PortionOfLiquid ] . ### Equipment universal: Siphon :Siphon rdf:type owl:Class ; owl:equivalentClass [ rdf:type owl:Class ; owl:intersectionOf ( :Pipe [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :SiphonicTransferFunction ] ) ] ; rdfs:label "siphon"@en ; iof-av:naturalLanguageDefinition "A siphon is a pipe that bears a siphonic transfer function: once primed, it conveys liquid upward from a reservoir over a crest and down to a lower discharge point, sustained by atmospheric pressure and gravity without continuous external power."@en ; skos:definition "A siphon is a pipe that bears a siphonic transfer function: once primed, it conveys liquid upward from a reservoir over a crest and down to a lower discharge point, sustained by atmospheric pressure and gravity without continuous external power."@en ; iof-av:naturalLanguageDefinition "Um sifao e um tubo que possui uma funcao de transferencia sifonica: uma vez escorvado, conduz liquido para cima de um reservatorio sobre uma crista e para baixo ate um ponto de descarga mais baixo, sustentado por pressao atmosferica e gravidade sem energia externa continua."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every siphon is a pipe that bears a siphonic transfer function, and conversely."@en ; iof-av:firstOrderLogicAxiom "∀x (Siphon(x) ↔ Pipe(x) ∧ ∃f (SiphonicTransferFunction(f) ∧ bearerOf(x,f)))"@en ; skos:altLabel "syphon"@en ;
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
SiphonicTransferFunction ⊑ FluidConductionFunction
Realized in
SiphonicTransferProcess ⊑ MomentumTransfer
The identity-giving trait is the unpowered, self-sustaining transfer capability itself (distinguishing it from a generic FluidConductionFunction-bearing Pipe, which does not inherently move liquid uphill), grounded verbatim in the primary definition and detailed by secondary/tertiary hydrostatics sources.
2 Genus DeterminationDeterminação do Gênero
Pipebfo:Object (BFO_0000030)
Parent candidates FLUID CONDUCTOR and CLOSED FLUID TRANSPORTER are not themselves enriched. Pipe (already enriched, function=FluidConductionFunction) is the closest enriched supertype and matches the physical form (a tube); the siphonic behavior is captured as a functional specialization rather than requiring a new unenriched intermediate genus.
3 Differentia SpecificaDiferença Específica
∃bearerOf.SiphonicTransferFunction

Bears a siphonic transfer function: once primed, it conveys liquid upward over a crest and down to a lower discharge point unaided, unlike a generic pipe which only conducts fluid along an existing pressure/gravity gradient.

Functional type: per the Axiom Mode Decision, the identity-giving function alone is both necessary and sufficient, following the same minimal pattern as check valve (∃bearerOf.BackflowPreventionFunction).
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

The commonly-cited 'short leg' / 'long leg' / 'crest' (triangulated across two independent tertiary sources) are fiat-demarcated regions of a single continuous tube, not separately assembled components -- modeling them via hasComponentPartAtAllTimes would misrepresent a mereological relation that does not hold (they are not removable/replaceable parts). The geometric asymmetry they describe is instead captured qualitatively in differentia_nl and the process signature.
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
{'type': 'PortionOfLiquid', 'count': 1, 'constraints': "liquid at the source reservoir's free surface, at or below atmospheric pressure"}
OutputsSaídas
{'type': 'PortionOfLiquid', 'count': 1, 'constraints': 'same liquid, discharged at a point below the source surface'}
TransformationTransformação
liquid raised over a crest above the source surface and delivered to a lower discharge point, driven by the head difference between the tube's two legs and atmospheric pressure, once the tube is primed
Passive fluid transport (no mechanical work added, unlike a pump) fits the fluid_transport canonical term, same as the genus Pipe; the siphonic-specific detail (crossing a crest above the source) is captured in the transformation phrase and Step 3's differentia rather than a distinct transformation_kind.
MetadataMetadados
COPI IDCOPI IDCOPI_0000782
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000782
StatusStatusvalidated
Axiom modeModoequivalent
CreatedCriado2026-09-08
UpdatedAtualizado2026-09-10
LLM modelModelo LLMclaude-sonnet-5
VersionVersão2026-10-07
Quick factsDados rápidos
GenusGêneroPipe
Root classClasse raizMaterialArtifact
Axiom modeModoequivalent
FunctionFunçãoSiphonicTransferFunction
ProcessProcessoSiphonicTransferProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 1 source
ISO 15926-4 SIPHON
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[function, mechanism]
A <SIPHON> is an <ARTEFACT> and a <FLUID CONDUCTOR> and a <CLOSED FLUID TRANSPORTER>that is a a tube used to convey liquid upwards from a reservoir and then down to a lower level of its own accord. Once the liquid has been forced into the tube, typically by suction or immersion, flow continues unaided
tertiarymanufacturer_pageverbatimfirgelliauto.com[structure, parameter]
The intake tube that dips into the upper reservoir. Inlet must sit at least 2 x pipe diameter below the free surface to prevent vortex air entrainment. The high point of the inverted U. Maximum theoretical height above the source is ~10.3 m for water at 20 C and 1 atm; practical limit is 7-8 m before dissolved-air degassing breaks the column. The downhill leg that does the actual work. Its outlet must be lower than the source surface -- that vertical difference (dh) is the head driving flow.
tertiaryweb_glossaryverbatimthisoldhouse.com[structure]
A siphon has two main parts: a short leg and a long leg. The short leg sits in the liquid source, while the long leg reaches a lower point where the liquid drains.

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