exported
necessary
flow meter
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Flowmeter
Generated on 2026-04-15
Natural Language Definition
EN
A flow meter is an instrument that bears a function to measure flow rate and produce corresponding signals or indications.
PT-BR
Um medidor de vazão é um instrumento que possui uma função de medir taxa de fluxo e produzir sinais ou indicações correspondentes.
Formal Axioms
Semi-formal (Aristotelian)
Every flow meter is an instrument that bears a flow measurement function and has component parts including a flow sensing element and signal processing unit
First-Order Logic Theory
Loading…
▸ Stored override
∀x(FlowMeter(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: FlowMeter
<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_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:MeasurementInformationContentEntity
] .
### Equipment universal: FlowMeter
:COPI_0000278 rdf:type owl:Class ; # FlowMeter
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 meter"@en ;
rdfs:label "medidor de vazão"@pt-br ;
iof-av:naturalLanguageDefinition "A flow meter is an instrument that bears a function to measure flow rate and produce corresponding signals or indications."@en ;
skos:definition "A flow meter is an instrument that bears a function to measure flow rate and produce corresponding signals or indications."@en ;
iof-av:naturalLanguageDefinition "Um medidor de vazão é um instrumento que possui uma função de medir taxa de fluxo e produzir sinais ou indicações correspondentes."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every flow meter is an instrument that bears a flow measurement function and has component parts including a flow sensing element and signal processing unit"@en ;
iof-av:firstOrderLogicAxiom "∀x(FlowMeter(x) ↔ Instrument(x) ∧ ∃f(FlowMeasurementFunction(f) ∧ bearerOf(x,f)))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Over-reaching equivalence (ODR-022 §17). The definition is \"measure flow rate AND produce corresponding signals or indications\" — indication is beyond FlowMeasurementFunction, so that function alone is not sufficient. As equivalent it absorbed flow element and orifice plate, which CFIHOS and POSC define as distinct from a meter (element produces a signal; meter measures and indicates)."@en ;
skos:definition "[CFIHOS] A detecting instrument intended to measure and indicate flow rate and/or produce a signal which represents the measured flow rate."@en ;
skos:definition "[SLB Glossary] A device installed in a pump manifold or treating line to measure the fluid flow rate."@en ;
skos:definition "[POSC Caesar] A detecting instrument intended to measure and indicate flow rate and/or produce a signal which represents the measured flow rate."@en .
# Disjointness: FlowMeter and PressureTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000278 :COPI_0000144 ) . # FlowMeter, PressureTransmitter
# Disjointness: FlowMeter and TemperatureTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000278 :COPI_0000155 ) . # FlowMeter, TemperatureTransmitter
# Disjointness: FlowMeter and LevelTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000278 :COPI_0000131 ) . # FlowMeter, LevelTransmitter
Axiomatization Decision Log
1
Identity-Giving Function
Function class
FlowMeasurementFunction
⊑ DesignedFunction
Realized in
FlowMeasurementProcess
⊑ PlannedProcess
The identity-giving function is to measure flow rate and produce signals or indications representing the measured flow. This distinguishes flow meters from other instruments that measure different process variables.
2
Genus Determination
Instrument
Flow meters are measuring instruments - they detect, measure and indicate or transmit process variables. The parent candidates 'instrument equipment' and 'Instrumentation And Control Equipment' point to the general category of instruments. While 'Instrument' is not explicitly in the parent candidates list, it is the obvious domain superclass for measuring devices and appears as genus for several already-enriched instrument types (flow indicator, limit switch, transmitter).
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These are the minimal essential components - a sensing element to detect flow and signal processing to produce the measurement output. Specific sensing mechanisms vary by subtype.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— flowing through measurement section
Outputs (O)
PortionOfFluid
— essentially unchanged but measured
MeasurementInformationContentEntity
— representing flow rate
Transformation (T)
measurement transduction - flow rate information extracted and converted to signal
Flow meters are non-intrusive measurement devices - fluid passes through essentially unchanged while flow information is extracted and converted to a measurement signal
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.
Over-reaching equivalence (ODR-022 §17). The definition is "measure flow rate AND produce corresponding signals or indications" — indication is beyond FlowMeasurementFunction, so that function alone is not sufficient. As equivalent it absorbed flow element and orifice plate, which CFIHOS and POSC define as distinct from a meter (element produces a signal; meter measures and indicates).
Disjointness Axioms
PressureTransmitter
TemperatureTransmitter
LevelTransmitter
C?: PressureTransmitter [kind_ambiguous]. C?: TemperatureTransmitter [kind_ambiguous]. C?: LevelTransmitter [kind_ambiguous]. These instrument types have incompatible measurement functions - an instrument cannot simultaneously measure flow rate and pressure/temperature/level as primary functions
Cross-Standard Observations
Consistent definition across CFIHOS and POSC Caesar as detecting instruments for flow measurement. SLB definition is more specific about installation context (pump manifold/treating line) but same core function. ISO 15926 subtypes focus on specific measurement principles and physical components.
