Elamur Groupantsonto-core-field
The groupant beside onto/src/core.rs in the Mova repository: what the code computes, what it never does, how to go back from its outputs, its invariants, cost and checks.
Facts
Implementation material. A Mova code model describes this code at one source revision: partial models, finite checks and their stated scope. It is not a reviewed general exposition, and its labels are shown as written, never raised.
Components
| component | label | where |
|---|---|---|
| approximant | partial | approximant |
| ast | partial | ../syntax.json |
| composition | partial | composition |
| cost | partial | Cost |
| descriptant | present | descriptant |
| invariant | partial | model.md |
| tests | executed bounded checks | tests |
Obernants
The typed relations around the forward model: the behaviour complement (what the code never does), the reverse reconstruction (every input compatible with an output) and specialised views.
| id | type | label | where |
|---|---|---|---|
behavior_complement | behavior_complement | partial source derived model | behavior_complement |
reverse_reconstruction | reverse_reconstruction | partial source derived model | reverse_reconstruction |
empty_known | empty_known | partial source derived model | empty_known |
reason_loss | reason_loss | partial source derived model | reason_loss |
borrow_transport | borrow_transport | partial source derived model | borrow_transport |
state_space | state_space | partial source derived model | state_space |
Model text
descriptant
onto-core-field
Known(v)→Some(&v),true,true; Unknown(reason)→None,false,true; NotApplicable→None,false,false.
Epoch 2026-10-31
Prospective review preceded inline test edits. Tests used bounded synthetic CPU fixtures only. Scope bytes [5772,6111) in the parent source. No field gives known=true and applicable=false; Unknown cannot return Some.
No production optimization, live teacher, corpus, assessment or database mutation. Registry presence denotes partial modeling; syntax is lexical and generated twice identically.
approximant
Forward model: onto-core-field
Known(v)→Some(&v),true,true; Unknown(reason)→None,false,true; NotApplicable→None,false,false.
Domain
Finite input arrays/text with resource availability and the source-specific bounds and representation assumptions in invariant.md. Exact categorical semantics; no executable percent surrogate is supplied. 1/2/5/10% caps need a meaningful metric and are not claimed.
Relations
known(Known(v))=Some(&v); known(Unknown(_))=known(NotApplicable)=None. is_known(f)⇔∃v:f=Known(v). is_applicable(f)⇔f≠NotApplicable. Thus is_known⇒is_applicable, but converse fails.
invariant
Invariant and cost
Scope bytes [5772,6111) in the parent source. No field gives known=true and applicable=false; Unknown cannot return Some.
Cost
O(1), no allocation.
No allocation, integer-overflow, malformed public-state or external-effect guarantee beyond explicitly described branches.
composition
Composition
Scope output feeds its parent: Generated CORE joins Graph by OEWN key/POS; check uses Kb::prop layer0 and ancestors. Query/describe can prefer core, but unknown values and lexfile warnings remain distinct.
Child fragments specialize concrete byte scopes and share the parent syntax projection; they do not duplicate whole-file guarantees. No composition-wide approximation error budget is established.
models
Typed obernant catalog
Partial source-derived relations, not proofs. Complement excludes incompatible observations; reverse describes compatible antecedents.
behavior_complement
No field gives known=true and applicable=false; Unknown cannot return Some.
reverse_reconstruction
None admits Unknown(any reason) and NotApplicable; pair(false,true) restricts Unknown but leaves reason free.
empty_known
Known empty slices remain known and applicable; emptiness not ignorance.
reason_loss
is_known/is_applicable discard Unknown reason without mutating it.
borrow_transport
known borrows original T, no cloning or allocation.
state_space
Three categorical states; no percentage surrogate metric.
tests
Evidence, 2026-10-31
Selected command: cargo test --offline --locked -p onto --bin onto -- --exact --test-threads=1 core::wave29::field_and_synset_semantics
Named outcomes:
- core::wave29::field_and_synset_semantics
Two debug and two release/optimized executions returned zero and identical sorted nonempty named outcomes. Source-generated syntax pairs matched byte-for-byte. 1 compiled source mutation rejected by named test, exact source restored and positive rerun succeeded.
- Control: "!matches!(self, Field::NotApplicable) -> matches!(self, Field::Known(_))" → "core::wave29::field_and_synset_semantics" (exit 101).
Finite synthetic examples only. Full ingestion, live workers, real corpus, allocation/I/O fault injection, GPU and full-school behavior remain unexecuted. No universal or executable-approximant assurance. External receipts: octopus-wave29-ontocore-2026-10-31 (native-commands.json, source-test-map.json, outcomes.json, controls.json and numeric exit/log files).
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/onto/src/core.rs.groupant/field.groupant/