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

The groupant beside world/src/mwe.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:** [`world/src/mwe.rs`](https://github.com/ElamurAI/mova-free/blob/main/world/src/mwe.rs)
- **source SHA-256:** `859883d4e16f6ed8…`
- **covers:** CUpt accepted rows, annotation grouping and token-ID projection. (bytes 817–3380)
- **part of:** [world-mwe](https://md.groupants.elamur.ai/free/en/mova/world/src/mwe.rs.groupant/)
- **repository folder:** [`world/src/mwe.rs.groupant/cupt.groupant`](https://github.com/ElamurAI/mova-free/tree/main/world/src/mwe.rs.groupant/cupt.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 source model | [forward](#forward) |
| **ast** | partial | `../syntax.json` |
| **composition** | partial source model | [composition](#composition) |
| **cost** | partial source model | [cost](#cost) |
| **descriptant** | partial source model | [epoch-memory](#epoch-memory) |
| **invariant** | partial source model | [invariant](#invariant) |
| **tests** | partial source model | [checks](#checks) |

## 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 |
|---|---|---|---|
| `world-mwe-cupt-behavior-complement` | behavior_complement | partial source model | [behavior-complement](#behavior-complement) |
| `world-mwe-cupt-reverse-reconstruction` | reverse_reconstruction | partial source model | [reverse-reconstruction](#reverse-reconstruction) |
| `world-mwe-cupt-head-coordinate` | identity_relation | partial source model | [head-coordinate](#head-coordinate) |
| `world-mwe-cupt-gold-order` | priority_relation | partial source model | [gold-order](#gold-order) |

## Model text


CUpt accepted rows, annotation grouping and token-ID projection.

### forward

Retain rows with >=11 tab columns and positive ASCII-decimal usize IDs; range, decimal, zero, empty and overflowing IDs are ignored. Preserve retained row order. Map each unique numeric ID to row index+1; duplicate numeric IDs map to zero. Parse heads through that map, absent/unparsable heads to zero. Lowercase lemmas, preserve forms/POS/relations. Annotation groups use string-key BTreeMap order; later nonempty category wins.

### invariant

Output vectors have identical lengths. Each nonzero head names a retained row with an unambiguous source ID. Gold indices name retained positions; duplicate annotation labels may duplicate indices, and self-heads can remain in Sent but predict ignores them.

### cost

O(B+N log N+A log G) plus string copying, where A counts annotation parts. O(B+N+A) storage includes read_to_string and grouped output.

### composition

Filtering must precede head remapping. Otherwise a sparse raw head can index an unrelated word or panic. Annotation indexing shares the retained order, not raw numeric IDs. Missing head maps to root-like zero, deliberately losing distinction.

### epoch-memory

2026-10-30 first lexical epoch: old native witnesses returned raw heads [0,10,99], accepted noun-only overlap and duplicate token IDs, and panicked on an out-of-range head. Narrow fixes translate unambiguous IDs, omit invalid/missing arcs, and enforce the documented distinct/shared-verb condition. Prediction-order greedy matching remains intentionally unchanged; historical tuning scores can differ. No corpus retuning or measured speed claim.

### checks

Native filter mwe::wave10_models; see ../evidence.md for fragments or evidence.md at the root. Finite supplied fixtures and independent oracles; no live parser, corpus, teacher or global dictionary activation. Partial syntax has opaque macro bodies and no semantic AST. No executable percentage surrogate or speed claim.

### behavior-complement

Universe: CUpt bytes and parsed outputs after successful I/O. Inner absent relation excludes nonzero attachments to missing or duplicated IDs and retained range/empty-node rows. This is tolerant projection, not a complete CUpt schema validator; comments must begin with # and annotation syntax is permissive.

Subject: current source hash and this node's declared scope. Relation describes one terminating call over the finite inputs stated above, with fixed dependencies and successful allocation. Status: partial source-derived model; named native fixtures support only their finite domain. Unobserved effects remain unknown.

### reverse-reconstruction

Given Sent retain all raw files producing its retained rows, including comments, ignored range/decimal rows, capitalization erased in lemmas and renumberings preserving head identity. Zero heads admit root, missing, duplicate and unparsable antecedents; they cannot identify which cause occurred.

Subject: current source hash and this node's declared scope. Relation describes one terminating call over the finite inputs stated above, with fixed dependencies and successful allocation. Status: partial source-derived model; named native fixtures support only their finite domain. Unobserved effects remain unknown.

### head-coordinate

For retained row j and unique source ID d, map(d)=j+1. For every row's raw head d this mapping replaces the old raw ID. The native sparse fixture [10,20,30] with heads [0,10,99] must become [0,1,0]; ignored range/decimal rows cannot shift the mapping.

Subject: current source hash and this node's declared scope. Relation describes one terminating call over the finite inputs stated above, with fixed dependencies and successful allocation. Status: partial source-derived model; named native fixtures support only their finite domain. Unobserved effects remain unknown.

### gold-order

Group IDs are strings, so BTreeMap sorts lexically, not numerically (10 before 2). This gold order feeds greedy judge. Categories are metadata only for matching; repeated category assignments retain the last nonempty value. No canonical semantic grouping or category agreement is imposed.

Subject: current source hash and this node's declared scope. Relation describes one terminating call over the finite inputs stated above, with fixed dependencies and successful allocation. Status: partial source-derived model; named native fixtures support only their finite domain. Unobserved effects remain unknown.