---
title: "onto-main-options — Mova code model"
description: "Mova code model of onto/src/main.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/onto/src/main.rs.groupant/options.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/main.rs.groupant/options.groupant/>

# onto-main-options

The groupant beside onto/src/main.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/main.rs`](https://github.com/ElamurAI/mova-free/blob/main/onto/src/main.rs)
- **source SHA-256:** `5c2c10af94c4e04b…`
- **covers:** opt(args,k)=args[first_position(k)+1] if present; wd_cfg optionally reads langs (bytes 20407–20931)
- **part of:** [onto-main](https://md.groupants.elamur.ai/free/en/mova/onto/src/main.rs.groupant/)
- **repository folder:** [`onto/src/main.rs.groupant/options.groupant`](https://github.com/ElamurAI/mova-free/tree/main/onto/src/main.rs.groupant/options.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) |
| `first_key` | first_key | partial source derived model | [first_key](#first-key) |
| `flag_value` | flag_value | partial source derived model | [flag_value](#flag-value) |
| `language_filter` | language_filter | partial source derived model | [language_filter](#language-filter) |
| `config_effect` | config_effect | partial source derived model | [config_effect](#config-effect) |

## Model text


### descriptant

#### onto-main-options

opt(args,k)=args[first_position(k)+1] if present; wd_cfg optionally reads langs

##### Epoch 2026-10-31

Specialized source fragment bytes [20407,20931); shared parent AST. Excludes unrelated parent operations and added test module.

### approximant

#### Scoped forward

opt(args,k)=args[first_position(k)+1] if present; wd_cfg optionally reads langs

##### Domain

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

No override by later duplicate

A following --flag is still accepted value

Trim then drop blank/comment lines

langs read error yields Err; skip_wm independently presence-based

No executable percentage surrogate established.

### invariant

#### Local observations

Missing/dangling key excludes Some; no --langs excludes file read

No override by later duplicate

A following --flag is still accepted value

Trim then drop blank/comment lines

langs read error yields Err; skip_wm independently presence-based

### cost

#### Scoped cost

O(argument count), plus optional language-file bytes.

Restriction to this operator's traversed inputs; parent total is not charged to every fragment. No standalone measurement.

### composition

#### Parent join

options supplies the parent relation: opt(args,k)=args[first_position(k)+1] if present; wd_cfg optionally reads langs

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

### models

### behavior_complement

Missing/dangling key excludes Some; no --langs excludes file read

### reverse_reconstruction

Same option value admits arbitrary nonmatching prefix and arbitrary suffix/duplicate keys

### first_key

No override by later duplicate

### flag_value

A following --flag is still accepted value

### language_filter

Trim then drop blank/comment lines

### config_effect

langs read error yields Err; skip_wm independently presence-based


### 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.