← Class ReferenceReferência de Classes
exported equivalent COPI_0000245
Densitometer
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000245
Generated onGerado em 2026-04-16
Natural Language DefinitionDefinição em Linguagem Natural
EN
A densitometer is an instrument that bears a density measurement function.
PT-BR
Um densitômetro é um instrumento que possui uma função de medição de densidade.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every densitometer is an instrument that has the function of measuring density.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Definition]∀x (Densitometer(x) ↔ Instrument(x) ∧ ∃f (DensityMeasurementFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function [Function axiom: DensityMeasurementFunction]∀f (DensityMeasurementFunction(f) → ∀p (realizedIn(f,p) → DensityMeasurementProcess(p)) ∧ ∃p (DensityMeasurementProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Process participation signature]∀x ∀f ((Densitometer(x) ∧ DensityMeasurementFunction(f) ∧ bearerOf(x,f)) → ∃m (FluidPortion(m) ∧ participatesIn(m,f)) ∧ ∃e (InformationContentEntity(e) ∧ participatesIn(e,f)) ∧ processType(f,MeasurementTransduction)) — 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: Densitometer <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 "1.1.0-104-g4d16eff" ; 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 "2026-07-13"^^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 :DensityMeasurementFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :DensityMeasurementProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :DensityMeasurementProcess ] ; rdfs:label "density measurement function"@en ; rdfs:label "função de medição de densidade"@pt-br . ### Process type :DensityMeasurementProcess rdf:type owl:Class ; rdfs:subClassOf iof-core:PlannedProcess ; rdfs:label "density measurement process"@en ; rdfs:label "processo de medição de densidade"@pt-br . :DensityMeasurementProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :FluidPortion ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :InformationContentEntity ] . ### Equipment universal: Densitometer :Densitometer rdf:type owl:Class ; owl:equivalentClass [ rdf:type owl:Class ; owl:intersectionOf ( :Instrument [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :DensityMeasurementFunction ] ) ] ; rdfs:label "densitometer"@en ; rdfs:label "densitômetro"@pt-br ; iof-av:naturalLanguageDefinition "A densitometer is an instrument that bears a density measurement function."@en ; skos:definition "A densitometer is an instrument that bears a density measurement function."@en ; iof-av:naturalLanguageDefinition "Um densitômetro é um instrumento que possui uma função de medição de densidade."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every densitometer is an instrument that has the function of measuring density."@en ; iof-av:firstOrderLogicAxiom "∀x(Densitometer(x) ↔ Instrument(x) ∧ ∃f(DensityMeasurementFunction(f) ∧ bearerOf(x,f)))"@en ; # Disjointness: Densitometer and FlowMeter [] rdf:type owl:AllDisjointClasses ; owl:members ( :Densitometer :FlowMeter ) . # Disjointness: Densitometer and PressureGauge [] rdf:type owl:AllDisjointClasses ; owl:members ( :Densitometer :PressureGauge ) . # Disjointness: Densitometer and TemperatureTransmitter [] rdf:type owl:AllDisjointClasses ; owl:members ( :Densitometer :TemperatureTransmitter ) .
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
DensityMeasurementFunction ⊑ DesignedFunction
Realized in
DensityMeasurementProcess ⊑ PlannedProcess
All three definitions consistently identify density measurement as the core purpose. This is what makes a densitometer a densitometer rather than any other measuring instrument.
2 Genus DeterminationDeterminação do Gênero
Instrumentbfo:Object (BFO_0000030)
From the parent_candidates, 'MEASURING INSTRUMENT' is most specific. Since 'Instrument' (without 'measuring') appears in the enriched classes as the genus for controllers, detectors, indicators, etc., and measuring is a subset of instrument functionality, 'Instrument' is the appropriate genus. This follows the pattern of other measuring devices in the enriched list.
3 Differentia SpecificaDiferença Específica
∃bearerOf.DensityMeasurementFunction

An instrument that bears a density measurement function, distinguishing it from instruments that measure other physical properties.

The density measurement function is the minimal differentiating condition that distinguishes densitometers from all other instruments. This is both necessary (all densitometers must measure density) and sufficient (any instrument that measures density is by definition a densitometer).
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

These are the minimal universal parts - every densitometer needs a sensing mechanism and output capability. Specific sensor types (photoelectric cell, gamma detector) are subtype-specific.
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
{'type': 'FluidPortion', 'count': 1, 'constraints': 'substance whose density is to be measured'}
OutputsSaídas
{'type': 'InformationContentEntity', 'count': 1, 'constraints': 'density measurement data'}
TransformationTransformação
transduction of material density property to information signal
Densitometers transform physical density information into measurable/transmittable data. The input is any material whose density needs measurement, output is density information.
Disjoint WithDisjunto com
flow meter pressure gauge temperature transmitter
C2: flow meter. C?: pressure gauge [kind_ambiguous]. C?: temperature transmitter [kind_ambiguous]. These instruments have incompatible measurement functions - an instrument cannot simultaneously measure density and flow rate, or density and pressure, as primary functions.
MetadataMetadados
COPI IDCOPI IDCOPI_0000245
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000245
StatusStatusexported
Axiom modeModoequivalent
CreatedCriado2026-04-16
UpdatedAtualizado2026-06-28
LLM modelModelo LLMclaude-sonnet-4-20250514
VersionVersão2026-07-13
Quick factsDados rápidos
GenusGêneroInstrument
Root classClasse raizMaterialArtifact
Axiom modeModoequivalent
FunctionFunçãoDensityMeasurementFunction
ProcessProcessoDensityMeasurementProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 3 sources
ISO 15926-4 DENSITOMETER
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.
SLB Glossary densitometer
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.
ONEPETRO_GLOSSARY Densitometer
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.