Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
flexible riser
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
This is primarily a constructive type defined by its flexible material configuration that allows vertical/near-vertical installation between seabed and surface. While it performs fluid conduction like any riser, its identity is given by the flexible construction enabling specific deployment geometry.
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
Loading…
Disjoint with
▸
Expert review
Axiomatization steps
1
Identity-Giving Function
✓ done
FluidConductionFunction → FluidConductionProcess ⊑ MomentumTransfer
▼
COPI-Core operation
MomentumTransfer via process parent MomentumTransfer
LLM rationale:
Reusing the same function as the parent class 'riser' since flexible riser performs the same core fluid conduction function. The flexibility is a structural differentia, not a functional one.
▸
Expert review
2
Genus Proximus
✓ done
Riser · MaterialArtifact
▼
Genus (genus proximum)
Most specific superclass — may be a domain class like "Valve" or an IOF-Core root.
BFO/IOF-Core Root
bfo:Object branch
bfo:ObjectAggregate branch
bfo:ImmaterialEntity branch
LLM rationale:
From parent_candidates, 'riser' is already enriched and is the most specific appropriate superclass. Flexible riser is a subtype of riser distinguished by its flexible construction. ARTEFACT is too broad.
▸
Expert review
3
Differentia Specifica
✓ done
∃hasQuality.FlexibleProperty
▼
Conditions that distinguish
Flexible Riser
from sibling classes under genus
Riser.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The key differentia is the flexible property that allows the riser to bend and accommodate vessel motion, distinguishing it from rigid riser designs.
▸
Expert review
4
Necessary Parts
✓ done
no necessary parts
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
Flexible risers require a flexible pipe body as their distinguishing structural component, plus the basic fluid-conducting bore common to all risers.
▸
Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → PortionOfFluid
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Same process signature as parent riser class - single fluid stream transported vertically from seabed to surface, with added capability for dynamic positioning accommodation.
▸
Expert review
More
Alternative labels
none
▼
Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
0 of 19 selected
▼
Select which CFIHOS/DEXPI properties inhere in every instance of Flexible Riser as
bfo:Quality subclasses.
Each selected property →
:FlexibleRiserQuality ⊑ bfo:Quality, inheres in :FlexibleRiser
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Flexible Riser.
Write the restriction block in Turtle syntax (without the leading
rdfs:subClassOf).
Example: [ owl:onProperty :hasPart ; owl:someValuesFrom :Wellhead ]
Cross-standard divergences
none detected yet
▼
Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
