exported
equivalent
skid
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Skid
Generated on 2026-04-15
Natural Language Definition
EN
A skid is an assembly that bears an equipment support function, consisting of a support frame and mounting points, designed to support equipment items during manufacturing, transportation, handling, and installation.
PT-BR
Um skid é uma montagem que possui uma função de suporte de equipamento, consistindo de uma estrutura de suporte e pontos de montagem, projetada para suportar itens de equipamento durante fabricação, transporte, manuseio e instalação.
Formal Axioms
Semi-formal (Aristotelian)
Every skid is an assembly that bears an equipment support function and has a support frame and mounting points as component parts at all times.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(Skid(x) ↔ (Assembly(x) ∧ ∃f(EquipmentSupportFunction(f) ∧ bearerOf(x,f)) ∧ ∃s(SupportFrame(s) ∧ hasComponentPartAtAllTimes(x,s)) ∧ ∃m(MountingPoint(m) ∧ hasComponentPartAtAllTimes(x,m))))
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: Skid
<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_0000508 rdf:type owl:Class ; # EquipmentSupportFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000509 # EquipmentSupportProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000509 # EquipmentSupportProcess
] ;
rdfs:label "equipment support function"@en ;
rdfs:label "função de suporte de equipamento"@pt-br .
### Process type
:COPI_0000509 rdf:type owl:Class ; # EquipmentSupportProcess
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "equipment support process"@en ;
rdfs:label "processo de suporte de equipamento"@pt-br .
:COPI_0000509 # EquipmentSupportProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom iof-core:PieceOfEquipment # EquipmentItem
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom iof-core:PieceOfEquipment # EquipmentItem
] .
### Equipment universal: Skid
:COPI_0000352 rdf:type owl:Class ; # Skid
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
iof-core:Assembly
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000508 # EquipmentSupportFunction
]
)
] ;
rdfs:label "skid"@en ;
rdfs:label "skid"@pt-br ;
iof-av:naturalLanguageDefinition "A skid is an assembly that bears an equipment support function, consisting of a support frame and mounting points, designed to support equipment items during manufacturing, transportation, handling, and installation."@en ;
skos:definition "A skid is an assembly that bears an equipment support function, consisting of a support frame and mounting points, designed to support equipment items during manufacturing, transportation, handling, and installation."@en ;
iof-av:naturalLanguageDefinition "Um skid é uma montagem que possui uma função de suporte de equipamento, consistindo de uma estrutura de suporte e pontos de montagem, projetada para suportar itens de equipamento durante fabricação, transporte, manuseio e instalação."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every skid is an assembly that bears an equipment support function and has a support frame and mounting points as component parts at all times."@en ;
iof-av:firstOrderLogicAxiom "∀x(Skid(x) ↔ (Assembly(x) ∧ ∃f(EquipmentSupportFunction(f) ∧ bearerOf(x,f)) ∧ ∃s(SupportFrame(s) ∧ hasComponentPartAtAllTimes(x,s)) ∧ ∃m(MountingPoint(m) ∧ hasComponentPartAtAllTimes(x,m))))"@en ;
skos:definition "[ISO 15926-4] A <SKID> is an <ARTEFACT> and a <SUPPORT> intended to support items when being manufactured, transported, handled or installed"@en ;
skos:definition "[SLB Glossary] A steel frame on which portable equipment is mounted to facilitate handling with cranes or flatbed trucks."@en ;
skos:definition "[OnePetro] Move a well to a close-by locations with minimum rig down of equipment."@en ;
skos:definition "[POSC Caesar] A 'support' intended to support items when being manufactured, transported, handled or installed."@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
EquipmentSupportFunction
⊑ DesignedFunction
Realized in
EquipmentSupportProcess
⊑ PlannedProcess
The identity-giving function is to provide structural support for equipment during manufacturing, transportation, handling, and installation phases. This distinguishes skids from other support structures by their mobility and multi-phase support capability.
2
Genus Determination
Assembly
bfo:Object (BFO_0000030)
Causally unified material artefact composed of physically connected,
separable MaterialComponent parts. Satisfies
Assembly ⊑ MaterialArtifact ⊑ bfo:Object.
No domain-specific parent exists in the enriched classes that captures support structures. A skid is a causally unified artefact with physically connected components (frame, mounting points, lifting lugs) that can be assembled/disassembled, making it an Assembly rather than a simple MaterialArtifact. The parent candidates (ARTEFACT, SUPPORT) are too broad and map to MaterialArtifact level.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These parts are essential for any skid to fulfill its support function - the frame provides structural integrity and mounting points enable equipment attachment.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
EquipmentItem
— portable equipment requiring support
Outputs (O)
EquipmentItem
— supported and transportable equipment
Transformation (T)
mechanical support and mobility enablement
Skids take equipment items that need support/transport and output the same items in a supported, transportable configuration. The transformation is purely mechanical - providing structural support and enabling handling.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Cross-Standard Observations
Definition 3 from onepetro_glossary describes a drilling operation rather than the equipment itself and appears to be a different sense of 'skid' (as a verb meaning to move). The other three sources are consistent in describing skid as a support structure/frame for equipment transport and handling.
