exported
necessary
flow element
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Flowelement
Generated on 2026-05-02
Natural Language Definition
EN
A flow element is an instrument that has the function to measure flow rates in a flowstream and produce signals proportional to the measured flow.
PT-BR
Um elemento de vazão é um instrumento que tem a função de medir vazões em um fluxo e produzir sinais proporcionais à vazão medida.
Formal Axioms
Semi-formal (Aristotelian)
Every flow element is an instrument that bears a FlowMeasurementFunction and has component parts including a FlowSensingElement and SignalGenerationComponent.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(FlowElement(x) ↔ (Instrument(x) ∧ ∃f(FlowMeasurementFunction(f) ∧ bearerOf(x,f))))
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: FlowElement
<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
:COPI_0000174 rdf:type owl:Class ; # FlowMeasurementFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000522 # FlowMeasurementProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000522 # FlowMeasurementProcess
] ;
rdfs:label "flow measurement function"@en ;
rdfs:label "função de medição de fluxo"@pt-br .
### Process type
:COPI_0000522 rdf:type owl:Class ; # FlowMeasurementProcess
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "flow measurement process"@en ;
rdfs:label "processo de medição de fluxo"@pt-br .
:COPI_0000522 # FlowMeasurementProcess
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
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom iof-core:InformationContentEntity
] .
### Equipment universal: FlowElement
:COPI_0000116 rdf:type owl:Class ; # FlowElement
rdfs:subClassOf :COPI_0000091 ; # Instrument
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000174 # FlowMeasurementFunction
] ;
rdfs:label "flow element"@en ;
rdfs:label "elemento de vazão"@pt-br ;
iof-av:naturalLanguageDefinition "A flow element is an instrument that has the function to measure flow rates in a flowstream and produce signals proportional to the measured flow."@en ;
skos:definition "A flow element is an instrument that has the function to measure flow rates in a flowstream and produce signals proportional to the measured flow."@en ;
iof-av:naturalLanguageDefinition "Um elemento de vazão é um instrumento que tem a função de medir vazões em um fluxo e produzir sinais proporcionais à vazão medida."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every flow element is an instrument that bears a FlowMeasurementFunction and has component parts including a FlowSensingElement and SignalGenerationComponent."@en ;
iof-av:firstOrderLogicAxiom "∀x(FlowElement(x) ↔ (Instrument(x) ∧ ∃f(FlowMeasurementFunction(f) ∧ bearerOf(x,f))))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
skos:definition "[CFIHOS] A detecting element that is producing a signal that is proportional to a flow rate."@en ;
skos:definition "[POSC Caesar] A device located in a flowstream measuring the flow."@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
FlowMeasurementFunction
⊑ DesignedFunction
Realized in
FlowMeasurementProcess
⊑ PlannedProcess
The identity-giving function is measuring flow and producing a proportional signal. This function is already established in the ontology as used by 'flow meter' and 'orifice plate', confirming it as the correct identity-giving function for flow measurement equipment.
✓
Expert review — Accepted
2
Genus Determination
Instrument
Flow elements are measurement instruments that detect and produce signals proportional to flow. While 'detecting element' from CFIHOS is more specific, it's not in our enriched classes. 'Instrumentation And Control Equipment' from POSC is too broad. 'Instrument' is the most specific appropriate superclass that exists in our ontology, already enriched and used by other measurement devices.
✓
Expert review — Accepted
"bfo_root: Assembly → MaterialArtifact (orifice plates, pitot tubes, venturis são peças únicas ou unidades integradas)"
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These parts represent the essential functional components present in all flow elements regardless of their specific measurement principle (Coriolis, electromagnetic, thermal, etc.).
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— flowing through measurement location
Outputs (O)
PortionOfFluid
— same fluid portion, minimally disturbed
InformationContentEntity
— proportional to flow rate
Transformation (T)
flow information extraction and signal generation without significant fluid alteration
Flow elements are inline measurement devices that extract flow information and convert it to a proportional signal while allowing the fluid to continue flowing with minimal disturbance.
✓
Expert review — Accepted
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.
✓
Expert review — Accepted
Cross-Standard Observations
Both CFIHOS and POSC Caesar definitions are aligned, emphasizing the measurement function and signal generation capability. CFIHOS is more specific about signal proportionality, while POSC focuses on the measurement aspect. The standards are consistent in treating this as a functional equipment category.
