Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
filter element
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
Filter element is defined structurally as 'the part of a filter assembly that is made from filter media' - identity is given by its physical composition (filter media) and its mereological role as a specific component part within a filter assembly. This is constructive rather than functional because the differentia is about what it is made of and how it fits in the assembly structure, not about a unique function it performs.
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
FiltrationFunction → FiltrationProcess ⊑ MechanicalSeparation
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COPI-Core operation
MechanicalSeparation via process parent MechanicalSeparation
LLM rationale:
Reusing existing FiltrationFunction from the already-enriched 'filter' class. A filter element performs the same core filtration function as the broader filter category - it is the active component that realizes the filtration process within a filter assembly.
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Expert review
2
Genus Proximus
✓ done
Filter · Assembly
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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:
Filter element is explicitly defined as 'part of a filter assembly' and performs filtration function, making it a specialized type of filter. The enriched Filter class is the most specific appropriate genus, being more specific than the generic Assembly or MaterialArtifact roots.
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Expert review
3
Differentia Specifica
✓ done
∃madeFrom.FilterMedia ⊓ ∃componentPartOf.FilterAssembly
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Conditions that distinguish
Filter Element
from sibling classes under genus
Filter.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia captures the two key structural aspects from the definition: material composition (filter media) and mereological relationship (part of assembly). These are the minimal conditions that distinguish filter elements from other filter types.
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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 parts are identified in the source definition or Known Component Terms list. The definition describes filter element as being 'made from filter media' but FilterMedia would be a material composition rather than a discrete component part. Since no specific component terms are provided in the sources, no parts are specified.
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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:
Filter element performs size-based particle removal through filter media, taking contaminated fluid as input and producing cleaner fluid as output. The transformation is mechanical filtration as the element physically screens out unwanted substances.
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Expert review
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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 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
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Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
