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

# onto-wdwalk-anchors-and-distribution

The groupant beside onto/src/wdwalk.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/wdwalk.rs`](https://github.com/ElamurAI/mova-free/blob/main/onto/src/wdwalk.rs)
- **source SHA-256:** `c4ee5e881b2a8f4f…`
- **covers:** Main=first accepted(.9) else argmin(-n_src,d,q) among n_src>=2(.7) else same among single(.6). Optional taxon argmin(rankpref,d,q) non-unsupported if main not/reaches taxon. Dist: n=|v|>0, mean=Σv/n, sd=sqrt(Σ(v-mean)^2/(n-1)) iff n>=2, extrema over v∪bounds. (bytes 17842–20036)
- **part of:** [onto-wdwalk](https://md.groupants.elamur.ai/free/en/mova/onto/src/wdwalk.rs.groupant/)
- **repository folder:** [`onto/src/wdwalk.rs.groupant/anchors-and-distribution.groupant`](https://github.com/ElamurAI/mova-free/tree/main/onto/src/wdwalk.rs.groupant/anchors-and-distribution.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 | `model.md` |
| **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) |
| `priority` | priority | partial source derived model | [priority](#priority) |
| `taxon_preference` | taxon_preference | partial source derived model | [taxon_preference](#taxon-preference) |
| `sample_variance` | sample_variance | partial source derived model | [sample_variance](#sample-variance) |
| `numeric_domain` | numeric_domain | partial source derived model | [numeric_domain](#numeric-domain) |

## Model text


### descriptant

#### onto-wdwalk-anchors-and-distribution

Main=first accepted(.9) else argmin(-n_src,d,q) among n_src>=2(.7) else same among single(.6). Optional taxon argmin(rankpref,d,q) non-unsupported if main not/reaches taxon. Dist: n=|v|>0, mean=Σv/n, sd=sqrt(Σ(v-mean)^2/(n-1)) iff n>=2, extrema over v∪bounds.

Epoch 2026-10-31: source byte range [17842,20036) with source and range hashes, sharing parent lexical AST. Partial source-derived scope, no semantic proof.

### approximant

#### Scoped forward relation

Main=first accepted(.9) else argmin(-n_src,d,q) among n_src>=2(.7) else same among single(.6). Optional taxon argmin(rankpref,d,q) non-unsupported if main not/reaches taxon. Dist: n=|v|>0, mean=Σv/n, sd=sqrt(Σ(v-mean)^2/(n-1)) iff n>=2, extrema over v∪bounds.

Scope bytes [17842,20036) only. Preconditions and exceptions in this scope's catalog; no claims for parent orchestration.

Executable approximant gap: no useful percentage metric established for these categorical/effectful observations. No surrogate or production substitution. Future caps 1/2/5/10% require a metric/domain and evidence; no numerical error bound follows here.

### invariant

## Scoped observations

Later accepted cannot replace first. Bounds excluded from mean/sd/n. Unsupported can be main>=2sources, cannot be added taxon.

### Cost

Anchor scans O(R), taxon predicate costs delegated to callbacks; distribution O(values+bounds), sig bounded formatting decimals. Floating sums may overflow or accept NaN.

### composition

#### Scope contribution

Main=first accepted(.9) else argmin(-n_src,d,q) among n_src>=2(.7) else same among single(.6). Optional taxon argmin(rankpref,d,q) non-unsupported if main not/reaches taxon. Dist: n=|v|>0, mean=Σv/n, sd=sqrt(Σ(v-mean)^2/(n-1)) iff n>=2, extrema over v∪bounds.

This fragment contributes only `anchors-and-distribution`. Parent owns input acquisition, surrounding dispatch and downstream joins. Complement and compatible antecedents are scoped in models.md rather than copied parent statements.

### models

### behavior_complement

Later accepted cannot replace first. Bounds excluded from mean/sd/n. Unsupported can be main>=2sources, cannot be added taxon.

### reverse_reconstruction

q/.9 admits row sequences with first accepted q; suffix arbitrary. Dist fiber consists ordered value/bound lists whose actual f64 reductions satisfy n,moments,extrema. Arbitrary value permutation is not invariant: [1e16,-1e16,1] sums to1 but [1e16,1,-1e16] sums to0. Extra non-extreme finite bounds preserve statistics in this scope.

### priority

Strict accepted beats shorter two-source.

### taxon_preference

Genus→species→family→other→missing then d,q.

### sample_variance

Singleton unknown sd, not0;100,200 mean150 sd√5000.

### numeric_domain

No finite validation; sig clamps decimals0..9, not universally3 significant digits.

### tests

#### Evidence boundary

Three existing synthetic folk/path/anchor/unit/distribution tests executed. read_core/full walker/real controls/file candidates unexecuted.

Parent tests.md names actual selected tests; this scope does not claim all its branches executed. The compiled control listed in parent receipt applies only to the named mutated boundary.