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

The groupant beside world/src/rreport.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/rreport.rs`](https://github.com/ElamurAI/mova-free/blob/main/world/src/rreport.rs)
- **source SHA-256:** `9dd22e3b675f2994…`
- **covers:** sample groups known ATTRS, excludes exact (story,n), then stable-sorts salted wrapping FNV/finalizer keys and takes k per type. read_verdicts skips malformed records and overwrites duplicate identities. manual averages only rows with exact verdict identity matches. (bytes 6196–9079)
- **part of:** [world-rreport](https://md.groupants.elamur.ai/free/en/mova/world/src/rreport.rs.groupant/)
- **repository folder:** [`world/src/rreport.rs.groupant/sampling.groupant`](https://github.com/ElamurAI/mova-free/tree/main/world/src/rreport.rs.groupant/sampling.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 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-rreport-sampling-behavior-complement` | behavior_complement | partial source model | [behavior-complement](#behavior-complement) |
| `world-rreport-sampling-reverse-reconstruction` | reverse_reconstruction | partial source model | [reverse-reconstruction](#reverse-reconstruction) |
| `world-rreport-sampling-coupling` | constraint_relation | partial source model | [coupling](#coupling) |
| `world-rreport-sampling-observation-fiber` | information_loss | partial source model | [observation-fiber](#observation-fiber) |

## Model text


### forward

sample groups known ATTRS, excludes exact (story,n), then stable-sorts salted wrapping FNV/finalizer keys and takes k per type. read_verdicts skips malformed records and overwrites duplicate identities. manual averages only rows with exact verdict identity matches.

### invariant

Sample size per known type <=k and eligible count; duplicate input identities can survive and hash collisions retain input order. Verdict floats are permissive, including NaN/out-of-range, and repeated rows count repeatedly.

### cost

N rows, G groups, V verdicts, total emitted bytes L: aggregation O(N log G + L), sampling O(N log N) with repeated hash-string work and seven attribute scans; manual O(N log V), formatting O(L). Answering and ROUGE dependency costs are separate. No measured speed claim.

### composition

main.rs reader evaluation calls reader::read_all on qs, then rows(own,&qs,ans), report/tsv and optional sample/manual. read_all maps qs in unchanged order. Native sample->read_verdicts->manual/report joins preserve (story,n) but bypass read_all and nonempty rows scoring. Ordered positional answer identity is a caller obligation.

### epoch-memory

2026-10-30 first source-bound epoch. Before repair, native invalid-score and cardinality assertions failed on old production behavior. Narrow input checks now prevent undefined NaN ordering and silent report undercount. Infinite parser scores remain supported. Empty conventions and malformed-metadata/repair limits are retained explicitly. No optimization or percentage-error surrogate is proposed.

### checks

cargo test -p world --lib rreport::wave10_models -- --test-threads=1. See root evidence.md for raw evidence hashes, repeated profiles and compiled controls. Syntax is partial; macro bodies are opaque and semantic AST/name/type resolution is absent.

### behavior-complement

Subject/revision: bound source hash and this scope. Domain/observation/operator: Exclude sampled identities in the exclusion set and contribution by unmatched rows to manual denominator. Equal n in different stories is not the same identity.

Status: partial source-derived relation; finite evidence only as named in checks. Assumptions: bounded counts without integer or floating arithmetic overflow, successful allocations and fixed dependencies. Unknown external behavior is not excluded. Reverse relations retain ambiguity; finite witnesses do not establish universal completeness.

### reverse-reconstruction

Subject/revision: bound source hash and this scope. Domain/observation/operator: Sample/aggregate output retains every input multiset containing chosen rows and any omitted ineligible/lower-ranked rows. Overwritten verdict histories and unselected rows are not recoverable.

Status: partial source-derived relation; finite evidence only as named in checks. Assumptions: bounded counts without integer or floating arithmetic overflow, successful allocations and fixed dependencies. Unknown external behavior is not excluded. Reverse relations retain ambiguity; finite witnesses do not establish universal completeness.

### coupling

Subject/revision: bound source hash and this scope. Domain/observation/operator: Two stories with the same question number retain distinct manual verdicts; supplied fixture yields 50% per metric and sentence count 2. Exclusion removes only one story's identity.

Status: partial source-derived relation; finite evidence only as named in checks. Assumptions: bounded counts without integer or floating arithmetic overflow, successful allocations and fixed dependencies. Unknown external behavior is not excluded. Reverse relations retain ambiguity; finite witnesses do not establish universal completeness.

### observation-fiber

Subject/revision: bound source hash and this scope. Domain/observation/operator: For 20 unique clean identities and k=0..22 native checks enforce cardinality, uniqueness and deterministic order; these do not prove hash distribution or uniqueness for duplicate input identities.

Status: partial source-derived relation; finite evidence only as named in checks. Assumptions: bounded counts without integer or floating arithmetic overflow, successful allocations and fixed dependencies. Unknown external behavior is not excluded. Reverse relations retain ambiguity; finite witnesses do not establish universal completeness.