Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
flow modification accessory
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
The concept is defined as something 'used to modify the characteristics of fluid flow' — the identity is given by the FlowModificationFunction it realizes, not by any specific physical configuration. Different mechanisms can modify flow characteristics (orifice plates, trim elements, etc.).
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
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Expert review
Axiomatization steps
1
Identity-Giving Function
✓ done
FlowModificationFunction → FlowModificationProcess ⊑ FlowControl
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COPI-Core operation
FlowControl via process parent FlowControl
LLM rationale:
Flow modification is the identity-giving function — what makes this equipment type distinct from other flow control devices. It is more specific than general FlowControlFunction because it focuses on altering flow characteristics rather than controlling flow rate or isolation. This differs from existing functions like FlowRestrictionFunction (which creates pressure drop) by being broader and encompassing various flow characteristic alterations.
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Expert review
2
Genus Proximus
✓ done
MaterialArtifact
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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:
This appears to be a root equipment category with no more specific superclass available. The parent candidates (FINAL CONTROL ASSEMBLY COMPONENT, MODIFIER) are too abstract and not domain-specific equipment classes. The concept represents a distinct category of flow accessories that would be the genus for more specific types like restriction orifices, flow conditioners, etc. Since it is itself the most specific category available, it becomes its own genus. The BFO root is MaterialArtifact as these are typically individual devices installed in piping systems.
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.FlowModificationFunction
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Conditions that distinguish
Flow Modification Accessory
from sibling classes under genus
MaterialArtifact.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
Since this is a root category, the differentia is simply the identity-giving function. This distinguishes it from other flow-related equipment that measure, control, or simply conduct flow without modifying its characteristics.
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Expert review
4
Necessary Parts
✓ done
no necessary parts
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Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
No component terms are available in the source standards, and the definition is too generic to specify universal parts. Flow modification accessories can have diverse physical implementations (orifice plates, flow conditioners, trim elements) with no common structural components that would be necessary across all subtypes.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → PortionOfFluid
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
The signature captures the essential transformation - fluid enters with one set of flow characteristics and exits with modified characteristics. The transformation_kind is flow_regulation as it involves modifying flow behavior, though not necessarily controlling flow rate.
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Expert review
More
Alternative labels
none
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Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
no CFIHOS/DEXPI properties
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No CFIHOS/DEXPI properties found for this cluster.
Custom axioms
none
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Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Flow Modification Accessory.
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
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Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
