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

The groupant beside gparse/src/data.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:** [`gparse/src/data.rs`](https://github.com/ElamurAI/mova-free/blob/main/gparse/src/data.rs)
- **source SHA-256:** `f115aeb0613b1ac5…`
- **covers:** read/write project CoNLL-U to retained 8-column Word state and renumber on output. (bytes 2164–3522)
- **part of:** [gparse-data](https://md.groupants.elamur.ai/free/en/mova/gparse/src/data.rs.groupant/)
- **repository folder:** [`gparse/src/data.rs.groupant/projection.groupant`](https://github.com/ElamurAI/mova-free/tree/main/gparse/src/data.rs.groupant/projection.groupant)
- **repository commit:** `48f2e6f74146`

> **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` |
| **cost** | symbolic source derived | [invariant](#invariant) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | [invariant](#invariant) |
| **tests** | partial 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) |
| `row_filter` | row_filter | partial source derived model | [row_filter](#row-filter) |
| `empty_flush` | empty_flush | partial source derived model | [empty_flush](#empty-flush) |
| `serialization_projection` | serialization_projection | partial source derived model | [serialization_projection](#serialization-projection) |
| `head_parse` | head_parse | partial source derived model | [head_parse](#head-parse) |

## Model text


### descriptant

#### Source-bound description

read/write project CoNLL-U to retained 8-column Word state and renumber on output.

##### Epoch 2026-10-31

Prospective model was recorded before edits. Added tests use bounded synthetic fixtures; production algorithms unchanged. Coverage is partial, not proof. No trained corpus, live teacher or throughput experiment was executed.

##### Epoch 2026-11-04

read keeps column 10 as Word.misc (`_` when the row has only 8 or 9 columns); write is unchanged and still emits `_` for DEPS and MISC.

### approximant

#### Forward approximant

read/write project CoNLL-U to retained 8-column Word state and renumber on output.

Domain: valid source-specific dimensions and resources stated in invariant; no automatic production substitution. Numerical observations are finite checks, not an end-to-end relative bound. Executable Rust surrogate: unsupported gap; existing exact tests are not surrogates. Future metric-specific caps may be 1/2/5/10%, never above 10%.

### invariant

#### Invariant and cost

Empty input produces no sentences; malformed heads become zero, comments-only blocks disappear.

##### Cost

O(input bytes) scanning/formatting plus retained words/comments.

Allocation, finite arithmetic, platform dimensions and external failures are not universally certified.

### models

## Typed model catalog

### behavior_complement

Range/decimal rows cannot enter Word output; invalid head does not produce an error.

### reverse_reconstruction

Ignored ID rows and DEPS/MISC cannot be reconstructed; all texts sharing retained words/comments are compatible.

### row_filter

c.len()<8 or ID contains '-' or '.' skips before indexing fields.

### empty_flush

Blank line emits only when words nonempty and always clears comments.

### serialization_projection

write assigns indices1..n and DEPS/MISC underscores; roles are omitted.

### head_parse

Malformed numeric head maps to zero, while parsed out-of-range head is preserved here.

### tests

#### Checks and limits

Selected parent checks relevant to this fragment (not exhaustive): data::tests::features_line_up_with_words; data::cost_tests::cost_counts_real_batch_shapes_and_filters_skipped_sentences; data::wave30::projection_roles_and_zero_budget

Selected commands run twice debug and twice release; exact receipts and source-to-test mapping retained in wave30 gparse external run directory. Tests do not certify allocation failure, all NaN/overflow inputs, trained-model accuracy or corpus timing. Compiled mutants cover selected boundaries; per-source coverage is recorded in the external map, not presumed.