exported
necessary
riser
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Riser
Generated on 2026-04-15
Natural Language Definition
EN
A riser is a pipe that has vertical or near-vertical orientation and is designed for the upward flow of liquid or gas.
PT-BR
Um riser é um tubo que tem orientação vertical ou quase vertical e é projetado para o fluxo ascendente de líquido ou gás.
Formal Axioms
Semi-formal (Aristotelian)
Every riser is a pipe that has vertical orientation and participates in upward flow processes.
First-Order Logic Theory
Loading…
▸ Stored override
∀x (Riser(x) → Pipe(x) ∧ ∃q(VerticalOrientation(q) ∧ hasQuality(x,q)) ∧ ∃p(UpwardFlowProcess(p) ∧ participatesIn(x,p)))
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: Riser
<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_0000529 rdf:type owl:Class ; # FluidConductionFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000530 # FluidConductionProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000530 # FluidConductionProcess
] ;
rdfs:label "fluid conduction function"@en ;
rdfs:label "função de condução de fluido"@pt-br .
### Process type
:COPI_0000530 rdf:type owl:Class ; # FluidConductionProcess
rdfs:subClassOf :COPI_0000003 ; # MomentumTransfer
rdfs:label "fluid conduction process"@en ;
rdfs:label "processo de condução de fluido"@pt-br .
:COPI_0000003 rdf:type owl:Class . # MomentumTransfer
:COPI_0000530 # FluidConductionProcess
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: Riser
:COPI_0000339 rdf:type owl:Class ; # Riser
rdfs:subClassOf :COPI_0000321 ; # Pipe
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000529 # FluidConductionFunction
] ;
rdfs:label "riser"@en ;
rdfs:label "riser"@pt-br ;
iof-av:naturalLanguageDefinition "A riser is a pipe that has vertical or near-vertical orientation and is designed for the upward flow of liquid or gas."@en ;
skos:definition "A riser is a pipe that has vertical or near-vertical orientation and is designed for the upward flow of liquid or gas."@en ;
iof-av:naturalLanguageDefinition "Um riser é um tubo que tem orientação vertical ou quase vertical e é projetado para o fluxo ascendente de líquido ou gás."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every riser is a pipe that has vertical orientation and participates in upward flow processes."@en ;
iof-av:firstOrderLogicAxiom "∀x (Riser(x) → Pipe(x) ∧ ∃q(VerticalOrientation(q) ∧ hasQuality(x,q)) ∧ ∃p(UpwardFlowProcess(p) ∧ participatesIn(x,p)))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Using necessary conditions because this is a constructive type defined by physical configuration. Under OWA, any pipe with vertical orientation and upward flow could be forced into this category, including specialized equipment that should not be classified as standard risers (e.g., reactor internals, distillation column internals). Starting with necessary conditions protects against false positives."@en ;
skos:definition "[ISO 15926-4] A <RISER> is a <FLUID CONDUCTOR> and a <FLUID TRANSPORTER> that is a vertical or near vertical pipe for the upward flow of liquid or gas"@en ;
skos:definition "[CFIHOS] A physical object that is a vertical or near vertical pipe for the upward flow of liquid or gas."@en ;
skos:definition "[OnePetro] Pipe through which liquid travels upward."@en ;
skos:definition "[POSC Caesar] A physical object that is a vertical or near vertical pipe for the upward flow of liquid or gas."@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
FluidConductionFunction
⊑ DesignedFunction
Realized in
FluidConductionProcess
⊑ MomentumTransfer
A riser's identity-giving function is the same as any pipe - to conduct fluid from one location to another. The distinguishing aspect is not a unique function but the constructive configuration (vertical orientation for upward flow).
2
Genus Determination
Pipe
From the parent candidates and definitions, riser is clearly a specialized type of pipe. ISO 15926 defines it as a FLUID CONDUCTOR, and all sources emphasize it is a 'pipe' with specific orientation. The enriched pipe class already exists in the ontology with FluidConductionFunction.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
Risers do not require any additional parts beyond those inherited from pipe. The differentia is purely geometric/configurational, not structural.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— liquid or gas phase, entering from bottom
Outputs (O)
PortionOfFluid
— same fluid composition, exiting at top with potential elevation head gain
Transformation (T)
gravitational potential energy change - fluid gains elevation
Risers transport fluid upward against gravity, adding gravitational potential energy to the fluid. The key signature element is the vertical elevation change.
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.
Using necessary conditions because this is a constructive type defined by physical configuration. Under OWA, any pipe with vertical orientation and upward flow could be forced into this category, including specialized equipment that should not be classified as standard risers (e.g., reactor internals, distillation column internals). Starting with necessary conditions protects against false positives.
Cross-Standard Observations
All sources consistently define riser as a vertical or near-vertical pipe for upward flow. ISO 15926 adds that it is both a FLUID CONDUCTOR and FLUID TRANSPORTER, while other sources focus on the physical object nature. The definition is remarkably consistent across sources.
