---
title: "wordgraph-pass — Mova code model"
description: "Mova code model of wordgraph/src/pass.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/wordgraph/src/pass.rs.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**

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# wordgraph-pass

The groupant beside wordgraph/src/pass.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
- **status:** partial source bound model
- **source:** [`wordgraph/src/pass.rs`](https://github.com/ElamurAI/mova-free/blob/main/wordgraph/src/pass.rs)
- **repository folder:** [`wordgraph/src/pass.rs.groupant`](https://github.com/ElamurAI/mova-free/tree/main/wordgraph/src/pass.rs.groupant)

> **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.

| relation | 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) |

## Model text


### Descriptant

A pass reads a source (Wikipedia tier-1 shards: index TSV + concatenated zstd frames of JSON records; or CoNLL-U
files, optionally zstd) into one part per unit: a zstd stream `WGPART01 | sorted OOV table | sorted unique (key,
count) records`, a JSON sidecar (counts, rules version, models seen, SHA-256) and the pass `meta.json`
(provenance). The negative control `shuffle` permutes dependents within each relation code. A pass resumes by
keeping parts whose files exist, and refuses parts made by other extraction rules.

### Approximant

read_unit(u, seed) = (sort(OOV(u)), count(sort(remap(shuffle_seed(E(u)))))) where E(u) is the concatenated event list
of the unit's sentences in input order, remap replaces interned numbers by ranks in the sorted OOV table, and count
run-length-merges equal keys (saturating u32). run(units) = map over units in a rayon pool (order of completion
irrelevant), then meta from sidecars sorted by part name.

### Invariant

Part bytes depend only on the unit content, the rules version and the seed, not on thread count (measured: shards
0–2 byte-identical with 2, 3 and 6 threads). Records are strictly increasing; the OOV table strictly increasing;
OOV ranks are < table length. The shuffle preserves every head, every relation, and the multiset of dependents per
relation; it is a pure function of (events, seed ^ hash(part name)).

### Cost

Time O(T + E log E) per unit (T tokens, E events); memory ≈ 20 B × E events + the shard file (about 0.6 GB peak at 6
threads on tier 1, 2026-11-06). 100 shards: 35 s wall, 184 s CPU, 337 MB on disk.

### Composition

Uses `extract` per sentence; its parts are read by `compile` through `PartReader`; `meta.json` is copied into the
graph's provenance.

### Tests

`shuffle_keeps_marginals_and_is_seeded` (same seed same permutation; marginals kept; pairs changed — the red side),
`today_is_a_date`; the resume guard was shown red on 2026-11-06 against a version-1 part.

### Behavior complement

Does not deduplicate inputs across passes (overlapping sources count twice), does not verify a resumed part's
SHA-256 against its sidecar, does not read the topic-corpus caches (`*.jsonl.zst`) or any non-CoNLL-U format,
does not lock the directory against concurrent writers, and does not delete anything.

### Reverse reconstruction

From a part one recovers the multiset of packed events with OOV strings; not the order of sentences, sentence
boundaries, articles, or which event came from which sentence. For a control part the original pairing is not
recoverable without the seed and the pre-shuffle order.

## Provenance

- **source SHA-256:** `7a6f6b3e26f691de…`
- **repository commit:** `c24d02b4c83b`