exported
necessary
compressor casing
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Compressorcasing
Generated on 2026-05-04
Natural Language Definition
EN
A Casing that is intended for housing compressor internals including the shaft with impellers and other compressor-specific mechanical components.
PT-BR
Um Invólucro que é destinado a abrigar componentes internos do compressor, incluindo o eixo com impulsores e outros componentes mecânicos específicos do compressor.
Formal Axioms
Semi-formal (Aristotelian)
CompressorCasing ⊑ Casing ⊓ ∃intendedForUseWith.Compressor
First-Order Logic Theory
Loading…
▸ Stored override
∀x (CompressorCasing(x) → (Casing(x) ∧ ∃y (Compressor(y) ∧ intendedForUseWith(x,y))))
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: CompressorCasing
<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_0000500 rdf:type owl:Class ; # EnclosureFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000501 # EnclosureProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000501 # EnclosureProcess
] ;
rdfs:label "enclosure function"@en ;
rdfs:label "função de proteção e invólucro"@pt-br ;
iof-av:naturalLanguageDefinition "A DesignedFunction that is realized in an EnclosureProcess and that consists in providing a structural boundary that houses and protects internal mechanical components from the environment while maintaining structural integrity."@en ;
skos:definition "A DesignedFunction that is realized in an EnclosureProcess and that consists in providing a structural boundary that houses and protects internal mechanical components from the environment while maintaining structural integrity."@en .
### Process type
:COPI_0000501 rdf:type owl:Class ; # EnclosureProcess
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "enclosure process"@en ;
rdfs:label "processo de proteção e invólucro"@pt-br ;
iof-av:naturalLanguageDefinition "A PlannedProcess in which a structural housing provides containment and protection for mechanical components, creating a defined boundary between internal mechanisms and the external environment."@en ;
skos:definition "A PlannedProcess in which a structural housing provides containment and protection for mechanical components, creating a defined boundary between internal mechanisms and the external environment."@en .
:COPI_0000501 # EnclosureProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000342 # CompressorInternals
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000342 # CompressorInternals
] .
### Equipment universal: CompressorCasing
:COPI_0000231 rdf:type owl:Class ; # CompressorCasing
rdfs:subClassOf :COPI_0000222 ; # Casing
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000500 # EnclosureFunction
] ;
rdfs:label "compressor casing"@en ;
rdfs:label "Invólucro"@pt-br ;
iof-av:naturalLanguageDefinition "A Casing that is intended for housing compressor internals including the shaft with impellers and other compressor-specific mechanical components."@en ;
skos:definition "A Casing that is intended for housing compressor internals including the shaft with impellers and other compressor-specific mechanical components."@en ;
iof-av:naturalLanguageDefinition "Um Invólucro que é destinado a abrigar componentes internos do compressor, incluindo o eixo com impulsores e outros componentes mecânicos específicos do compressor."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "CompressorCasing ⊑ Casing ⊓ ∃intendedForUseWith.Compressor"@en ;
iof-av:firstOrderLogicAxiom "∀x (CompressorCasing(x) → (Casing(x) ∧ ∃y (Compressor(y) ∧ intendedForUseWith(x,y))))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive type based on structural configuration. Under OWA, sufficient conditions for compressor-specific casing identity could lead to false positives where any enclosure intended for compressors might be classified as a standard compressor casing, including specialized or hybrid enclosures that warrant distinct classification."@en ;
skos:definition "[ISO 15926-4] A <COMPRESSOR CASING> is a <CASING> that is the typical enclosure for compressors housing the shaft with impeller(s) and other compressor internals"@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
EnclosureFunction
⊑ DesignedFunction
Realized in
EnclosureProcess
⊑ PlannedProcess
A compressor casing shares the same identity-giving function as other casings - it provides enclosure. The definition shows it is 'the typical enclosure for compressors' which indicates its identity is structural (housing shaft and impellers) rather than functionally distinct from other enclosures.
2
Genus Determination
Casing
The ISO 15926 definition explicitly states 'A COMPRESSOR CASING is a CASING', making Casing the direct genus. Casing is already enriched in our ontology with EnclosureFunction and Assembly as its BFO root. This follows the genus proximum principle of using the most specific appropriate superclass.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
The source definition does not specify particular structural parts that are universal to all compressor casings. While it mentions that the casing houses 'shaft with impeller(s) and other compressor internals', these are the contents of the casing, not parts of the casing itself. No component terms are provided in the known component terms list, and the definition does not detail the casing's own structural components.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
CompressorInternals
— shaft with impellers and other internal components requiring enclosure
Outputs (O)
CompressorInternals
— housed and protected internal components
Transformation (T)
structural containment and protection of compressor mechanical internals
The signature reflects the casing's role in passively containing and protecting compressor internals. The transformation is purely structural containment without altering the functional state of the internals.
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.
Constructive type based on structural configuration. Under OWA, sufficient conditions for compressor-specific casing identity could lead to false positives where any enclosure intended for compressors might be classified as a standard compressor casing, including specialized or hybrid enclosures that warrant distinct classification.
Cross-Standard Observations
Only one source provided. No cross-standard comparison possible.