Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
filter medium
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
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
SelectivePermeabilityFunction → FiltrationProcess ⊑ MechanicalSeparation
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COPI-Core operation
MechanicalSeparation via process parent MechanicalSeparation
LLM rationale:
SLB defines it as 'a permeable material ... through which filtrate passes and on which the filter cake is deposited'. Its identity-giving function is selective permeability — passing one phase while retaining another — which is narrower than the filtration function borne by a filter as a whole.
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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:
SLB calls it a permeable material used in a filtration device; as an engineered barrier it is a MaterialArtifact.
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Expert review
3
Differentia Specifica
✓ done
∃bearerOf.SelectivePermeabilityFunction ⊓ ∃componentPartOf.Filter
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Conditions that distinguish
Filter Medium
from sibling classes under genus
MaterialArtifact.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
Necessary-only and deliberately given a function distinct from the Filter entry's FiltrationFunction. Filter is defined as equivalent on FiltrationFunction; reusing that function here would let the reasoner infer that the medium is the filter.
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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 sub-component is named in any source definition for this term. validate_necessary_parts_quotes() requires a verbatim source_quote for every part, and there is nothing to quote — so no parts are asserted (ODR-022 §10.2).
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
FluidMixture → PortionOfFluid + RemovedMaterial
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Two outputs, matching the SLB definition: the filtrate that passes and the cake that is retained.
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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 Filter Medium.
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.
