---
title: "onto-bridge-class-mapping — Mova code model"
description: "Mova code model of onto/src/bridge.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/onto/src/bridge.rs.groupant/class-mapping.groupant/"
---
Elamur: [Mova](https://md.mova.elamur.ai/free/en/) · [Dictionary](https://md.dictionary.elamur.ai/free/en/) · [Research](https://md.research.elamur.ai/free/en/) · **Groupants**

This page as HTML: <https://groupants.elamur.ai/free/en/mova/onto/src/bridge.rs.groupant/class-mapping.groupant/>

# onto-bridge-class-mapping

The groupant beside onto/src/bridge.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

- **kind:** groupant_fragment
- **status:** partial source bound model
- **source:** [`onto/src/bridge.rs`](https://github.com/ElamurAI/mova-free/blob/main/onto/src/bridge.rs)
- **source SHA-256:** `b9df59904a00c9ad…`
- **covers:** class→first successful(exact,variants,head); sense=first context match else senses[0] (bytes 3995–5336)
- **part of:** [onto-bridge](https://md.groupants.elamur.ai/free/en/mova/onto/src/bridge.rs.groupant/)
- **repository folder:** [`onto/src/bridge.rs.groupant/class-mapping.groupant`](https://github.com/ElamurAI/mova-free/tree/main/onto/src/bridge.rs.groupant/class-mapping.groupant)
- **repository commit:** `855da7bd4a7b`

> **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](#approximant) |
| **ast** | partial | `../syntax.json` |
| **composition** | partial | [composition](#composition) |
| **cost** | partial | [cost](#cost) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | [invariant](#invariant) |
| **tests** | executed bounded checks | [tests](#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](#behavior-complement) |
| `reverse_reconstruction` | reverse_reconstruction | partial source derived model | [reverse_reconstruction](#reverse-reconstruction) |
| `tier_order` | tier_order | partial source derived model | [tier_order](#tier-order) |
| `context_fiber` | context_fiber | partial source derived model | [context_fiber](#context-fiber) |
| `fallback_identity` | fallback_identity | partial source derived model | [fallback_identity](#fallback-identity) |
| `empty_domain` | empty_domain | partial source derived model | [empty_domain](#empty-domain) |

## Model text


### descriptant

#### onto-bridge-class-mapping

class→first successful(exact,variants,head); sense=first context match else senses[0]

##### Epoch 2026-10-31

Specialized source fragment bytes [3995,5336); shared parent AST. Excludes unrelated parent operations and added test module.

### approximant

#### Scoped forward

class→first successful(exact,variants,head); sense=first context match else senses[0]

##### Domain

This byte-scoped operator uses the parent valid-state domain plus the following local restrictions:

Exact<Variant<Head<Missing

All contexts mapping to lexfile(c) can return matched=true

Different hyphen/underscore forms can share head result

Missing returns(None,false); Found must have at least one sense

No executable percentage surrogate established.

### invariant

#### Local observations

Head excludes any earlier-tier success; Missing excludes all candidates

Exact<Variant<Head<Missing

All contexts mapping to lexfile(c) can return matched=true

Different hyphen/underscore forms can share head result

Missing returns(None,false); Found must have at least one sense

### cost

#### Scoped cost

At most four lookup attempts plus one final-head lookup; each delegates binary word lookup and sense collection. Context selection O(S) per successful tier; allocates spelling variants O(class bytes). No file I/O.

Symbolic accounting; no timing claim or whole-system speed bound.

### composition

#### Parent join

class-mapping supplies the parent relation: class→first successful(exact,variants,head); sense=first context match else senses[0]

Output compatibility is conditional on the local domain and earlier-branch exclusions. Other parent branches are outside this fragment.

### models

### behavior_complement

Head excludes any earlier-tier success; Missing excludes all candidates

### reverse_reconstruction

(tier,c,matched)⁻¹ includes all class spellings satisfying earlier-tier emptiness and selected sense order

### tier_order

Exact<Variant<Head<Missing

### context_fiber

All contexts mapping to lexfile(c) can return matched=true

### fallback_identity

Different hyphen/underscore forms can share head result

### empty_domain

Missing returns(None,false); Found must have at least one sense


### tests

#### Evidence

Parent tests.md identifies selected actual-code checks. Fragment is a source-scoped partial model; parent finite fixtures do not establish exhaustive branch coverage or every local equation.