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

# prag-feats-quotes

The groupant beside prag/src/feats.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:** [`prag/src/feats.rs`](https://github.com/ElamurAI/mova-free/blob/main/prag/src/feats.rs)
- **source SHA-256:** `2a1a0bd6e43dd16f…`
- **covers:** One-delimiter quote automaton emits byte spans and persistent open state. (bytes 3822–5269)
- **part of:** [prag-feats](https://md.groupants.elamur.ai/free/en/mova/prag/src/feats.rs.groupant/)
- **repository folder:** [`prag/src/feats.rs.groupant/quotes.groupant`](https://github.com/ElamurAI/mova-free/tree/main/prag/src/feats.rs.groupant/quotes.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 |
|---|---|---|---|
| `prag-feats-quotes-behavior-complement` | behavior_complement | partial source model | [behavior-complement](#behavior-complement) |
| `prag-feats-quotes-reverse-reconstruction` | reverse_reconstruction | partial source model | [reverse-reconstruction](#reverse-reconstruction) |
| `prag-feats-quotes-coupling` | constraint_relation | partial source model | [coupling](#coupling) |
| `prag-feats-quotes-observation-fiber` | information_loss | partial source model | [observation-fiber](#observation-fiber) |

## Model text


One-delimiter quote automaton emits byte spans and persistent open state.

Source snapshot: 2a1a0bd6e43dd16f7284e993f30d0f4971c447c9e2080616033d19ac8693611f. All relations concern this snapshot on the stated admissible domain. Models are source-derived partial relations; finite fixtures are evidence, not general proofs. Complement is a conservative inner constraint model. Reverse reconstruction preserves all compatible antecedents conceptually; no enumerating solver is implemented.

### forward

Scan char_indices; double open marks always start when closed; single open marks require nonword predecessor and alphanumeric successor. Matched straight/curly closers emit [start,byte); single apostrophes between alphanumerics do not close. If still open append [start,text.len). Filter empty and nonalphanumeric spans without changing final delimiter state.

### behavior-complement

Universe: valid UTF-8 text and states None or one supported opening delimiter paired with intervals/state. Excluded intervals split Unicode codepoints, include their opening delimiter, have empty content, or consist solely of punctuation. A closing apostrophe inside don't cannot terminate a single-quoted span.

### reverse-reconstruction

An observed empty span list permits unquoted text, punctuation-only quoted text or empty carried text. Retain all texts and opening states whose automaton ends in observed state and emits exact intervals; absent text content and delimiter style cannot be uniquely recovered from interval lengths.

### invariant

Bounds increase and are valid UTF-8 boundaries; emitted content contains an alphanumeric. Open state may survive even when no span survives filtering. Nested quotation is not represented as a stack.

### cost

O(B) time and O(B) temporary char-index storage plus spans for B bytes. No measured speedup or executable approximation error bound is claimed.

### coupling

extract supplies carry only at adjacent same paragraph/source/doc ordinal. row applies a second direct-speech filter: quote_spans detects delimiters, not narrative intent.

### observation-fiber

Straight and curly double closers may complete the same state; punctuation-only quotes disappear from span output but can affect carry. Filtering spans therefore cannot reconstruct raw delimiter events.

### composition

extract supplies carry only at adjacent same paragraph/source/doc ordinal. row applies a second direct-speech filter: quote_spans detects delimiters, not narrative intent. No child fragments; this is one scoped relation.

### checks

quote_unicode_state_and_content_bounds: six literal texts, mixed Unicode, apostrophe interior, adjacent spans, carried Unicode and empty carry. See the file-level evidence.md for exact log hashes and repeated run outcomes.

### epoch-memory

2026-10-30 wave13: initial source-bound model. Prospective model preceded edits. Existing normalization and quote rules were retained; tests expose their information loss. Source identity witness justified qualifying predecessor keys by Src. Annotation is isolated behind a private closure used by the production row wrapper; fixtures do not call or certify tokenizer/parser. AST is a partial syntax projection, macro bodies opaque; semantic AST, live model/corpus and general proof remain absent.