Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
flow element
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
Both CFIHOS and POSC Caesar define flow element by its functional purpose: producing a signal proportional to flow rate or measuring flow in a flowstream. The identity is given by the FlowMeasurementFunction, not by specific constructive mechanisms (which are present in subtypes like coriolis, electromagnetic, thermal, etc.).
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
▸
Expert review
— accepted
Axiomatization steps
1
Identity-Giving Function
✓ done
⚠ not anchored
FlowMeasurementFunction → FlowMeasurementProcess
▼
COPI-Core operation
⚠ Process parent
PlannedProcess reaches no COPI-Core operation, and no gap (out of scope / coverage gap) is recorded.
LLM rationale:
The identity-giving function is measuring flow and producing a proportional signal. This function is already established in the ontology as used by 'flow meter' and 'orifice plate', confirming it as the correct identity-giving function for flow measurement equipment.
▸
Expert review
— accepted
2
Genus Proximus
✓ done
Instrument · 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:
Flow elements are measurement instruments that detect and produce signals proportional to flow. While 'detecting element' from CFIHOS is more specific, it's not in our enriched classes. 'Instrumentation And Control Equipment' from POSC is too broad. 'Instrument' is the most specific appropriate superclass that exists in our ontology, already enriched and used by other measurement devices.
▸
Expert review
— accepted
3
Differentia Specifica
✓ done
∃hasFunction.FlowMeasurementFunction
▼
Conditions that distinguish
Flow Element
from sibling classes under genus
Instrument.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The FlowMeasurementFunction is the minimal differentiating condition that distinguishes flow elements from all other types of instruments under the same genus. This aligns with both source definitions emphasizing flow measurement as the defining characteristic.
▸
Expert review
— accepted
4
Necessary Parts
✓ done
no necessary parts
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
These parts represent the essential functional components present in all flow elements regardless of their specific measurement principle (Coriolis, electromagnetic, thermal, etc.).
▸
Expert review
— accepted
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → PortionOfFluid + InformationContentEntity
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Flow elements are inline measurement devices that extract flow information and convert it to a proportional signal while allowing the fluid to continue flowing with minimal disturbance.
▸
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 5 selected
▼
Select which CFIHOS/DEXPI properties inhere in every instance of Flow Element as
bfo:Quality subclasses.
Each selected property →
:FlowElementQuality ⊑ bfo:Quality, inheres in :FlowElement
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Flow Element.
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.
