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

The groupant beside world/src/knowledge.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/knowledge.rs`](https://github.com/ElamurAI/mova-free/blob/main/world/src/knowledge.rs)
- **source SHA-256:** `0128bd416063db7a…`
- **covers:** Citation scanner and unread-suffix state (bytes 4956–5876)
- **part of:** [school-format](https://md.groupants.elamur.ai/free/en/mova/world/src/knowledge.rs.groupant/format.groupant/)
- **repository folder:** [`world/src/knowledge.rs.groupant/format.groupant/citation-scan.groupant`](https://github.com/ElamurAI/mova-free/tree/main/world/src/knowledge.rs.groupant/format.groupant/citation-scan.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** | source derived partial | [forward](#forward) |
| **ast** | partial | `../../syntax.json` |
| **cost** | prospective source cost | [cost](#cost) |
| **descriptant** | present | [epoch-memory](#epoch-memory) |
| **invariant** | source derived partial | [invariant](#invariant) |
| **tests** | bounded named actual code | [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 |
|---|---|---|---|
| `school-citation-scan-complement` | behavior_complement | source derived inner bound | [behavior-complement](#behavior-complement) |
| `school-citation-scan-preimage` | reverse_reconstruction | partial relational specification | [reverse-reconstruction](#reverse-reconstruction) |
| `school-citation-scan-recognizer` | lexical_admissibility | source derived partial | [recognizer](#recognizer) |
| `school-citation-scan-suffix-progress` | termination_measure | source derived partial | [suffix-progress](#suffix-progress) |
| `school-citation-scan-nested-parentheses` | delimiter_projection | source derived partial | [nested-parentheses](#nested-parentheses) |
| `school-citation-scan-whitespace-loss` | information_loss | source derived partial | [whitespace-loss](#whitespace-loss) |

## Model text


Subject: `world/src/knowledge.rs` at manifest source SHA. Horizon: one terminating call or explicitly named load prefix on finite synthetic inputs, pinned dependencies and ordinary allocation/I/O. This is a source-derived partial model; finite tests do not establish universal correspondence.

### forward

State (out,rest) scans the next '(' and first subsequent ')'. For a recognized reference, append trim_end(prefix) and advance beyond ')'; otherwise append prefix+'(' and advance only one delimiter. An unmatched '(' terminates scanning and copies the whole remaining suffix. This deliberately does not parse balanced parentheses.

### invariant

Each completed iteration consumes at least one byte of rest at an ASCII boundary; UTF-8 boundaries are preserved. Output never expands beyond input bytes. Nonreference nesting may still expose a later inner reference.

### cost

For B bytes, O(B) output space; conservative O(B^2) scanning/tokenization in nested nonreference inputs because suffixes may be revisited. No measured speedup.

### behavior-complement

Type: behavior_complement. Over UTF-8 string/output pairs, exclude deleting a closed group whose last token lacks ':' or whose numeric tail contains a letter, unless a separately scanned nested group qualifies. Exclude inventing output bytes. These are inspected inner bounds, not a balanced-parenthesis grammar claim.

### reverse-reconstruction

Type: reverse_reconstruction. Given output y, retain all strings whose scanner trace emits y: optional qualifying reference insertions can erase adjacent trailing whitespace, while nonreference groups survive except independently recognized inner spans. Empty output admits empty input and reference-only inputs. The original citations and whitespace cannot be uniquely recovered.

### recognizer

Type: lexical_admissibility. Closed inner text needs >=2 whitespace words; every name token starts uppercase or ASCII digit; last token contains ':' and only digits, ':', '-', ','. This does not validate books or verse numbers. Domain and fixed-source assumptions are those above; this is a source-derived constraint, checked only by the bounded named oracle where applicable.

### suffix-progress

Type: termination_measure. The unread byte length strictly decreases on each iteration; an unmatched opening exits without deleting rest. Observe trace positions rather than count of balanced pairs. Domain and fixed-source assumptions are those above; this is a source-derived constraint, checked only by the bounded named oracle where applicable.

### nested-parentheses

Type: delimiter_projection. First-closing-delimiter selection plus one-byte fallback allows an inner valid reference to be stripped from an invalid outer group; outer structure is not a protected span. Domain and fixed-source assumptions are those above; this is a source-derived constraint, checked only by the bounded named oracle where applicable.

### whitespace-loss

Type: information_loss. A successful deletion trims the immediately preceding prefix's trailing whitespace, while following suffix whitespace survives. Antecedents differing in removed citation/preceding whitespace share output. Domain and fixed-source assumptions are those above; this is a source-derived constraint, checked only by the bounded named oracle where applicable.

### parent-interaction

parse_fields invokes this for explain; fact_lines invokes it only on fallback. Invalid field/question errors can stop the parent before later calls. Citation cost is already inside the format fold.

### checks

`knowledge::wave34_tests::citation_scan_preserves_nonreferences_and_utf8_suffixes` directly executes this helper or its containing load/reuse path with literal expected results. Full source and selected test body reviewed; no implementation-copy oracle. Exact names, profile repetitions and mutation receipts are recorded in the wave34 evidence summary. These are finite synthetic witnesses; unobserved cases and opaque dependencies remain gaps.

### epoch-memory

2026-10-31 wave34: prospective relations saved before test additions. Production bytes preserved. This new finer scope retains its parent's earlier models and history. Shared partial syntax is generated twice and compared; no semantic AST or solver claimed. No teacher, corpus, model loading, successful examination, training or lesson replay is credited as persistent knowledge.