--- title: "court-rule-codec-clause — Mova code model" description: "Mova code model of yom-hadin/src/rule.rs: components with their labels, obernants and the model text." url: "https://groupants.elamur.ai/free/en/mova/yom-hadin/src/rule.rs.groupant/clause.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: # court-rule-codec-clause The groupant beside yom-hadin/src/rule.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 derived models - **source:** [`yom-hadin/src/rule.rs`](https://github.com/ElamurAI/mova-free/blob/main/yom-hadin/src/rule.rs) - **source SHA-256:** `211396ab0efca1ad…` - **covers:** Clause text encoder/decoder and display projection. (bytes 1772–3254) - **part of:** [court-rule-codec](https://md.groupants.elamur.ai/free/en/mova/yom-hadin/src/rule.rs.groupant/) - **repository folder:** [`yom-hadin/src/rule.rs.groupant/clause.groupant`](https://github.com/ElamurAI/mova-free/tree/main/yom-hadin/src/rule.rs.groupant/clause.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 | [approximant](#approximant) | | **ast** | partial | `../syntax.json` | | **cost** | partial | `model.md` | | **descriptant** | present | [descriptant](#descriptant) | | **invariant** | partial | [Invariant](#invariant) | | **tests** | finite native 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) | | `negation_prefix` | negation_prefix | partial source derived model | [negation_prefix](#negation-prefix) | | `argument_filter` | argument_filter | partial source derived model | [argument_filter](#argument-filter) | | `verb_normalization` | verb_normalization | partial source derived model | [verb_normalization](#verb-normalization) | | `display_loss` | display_loss | partial source derived model | [display_loss](#display-loss) | ## Model text ### descriptant #### Clause text encoder/decoder and display projection. ##### Epoch 2026-10-31 Prospective review preceded test edits. Runtime logic unchanged; three sources gain tests. Synthetic witnesses do not validate legal conclusions. Composition: Encode neg marker, space-to-underscore verb, slash patient sentinel and optional comma args; decode first3 slash fields and normalize underscore to space. Retained limits: partial syntax, opaque macros; no live corpus, teacher, parser model, production filesystem or frozen gold. Complete semantics and executable approximants remain open. ### approximant #### Forward model Clause text encoder/decoder and display projection. Encode neg marker, space-to-underscore verb, slash patient sentinel and optional comma args; decode first3 slash fields and normalize underscore to space. Not an executable substitute. Percentage approximation is unsupported without a useful metric; future profiles limited to 1/2/5/10% require actual-reference comparison. ### models ## Typed models: Clause text encoder/decoder and display projection. Subject: yom-hadin/src/rule.rs, SHA-256 211396ab0efca1ad45c77dc3a3752ae335570464b18814d61837deae6d102a6a. Domain: bounded finite synthetic rules/cases; valid indices and successful allocation unless a section narrows this. Each relation observes implementation, not legal authority. Status: partial source-derived model, finite evidence mapped in tests.md. ### behavior_complement Empty decoded verb always errors; decoder cannot retain fourth slash field. Operator: stated relation on this source projection. Assumptions: named domain and unchanged dependencies. Evidence: tests.md maps finite observations; other branches remain source review only. ### reverse_reconstruction Patient missing/empty/'-' all reconstruct None; underscores normalize and extra slash fields vanish, yielding nonunique text preimages. Operator: stated relation on this source projection. Assumptions: named domain and unchanged dependencies. Evidence: tests.md maps finite observations; other branches remain source review only. ### negation_prefix Exactly one leading ! is stripped; a second ! belongs to verb text and can reencode. Operator: stated relation on this source projection. Assumptions: named domain and unchanged dependencies. Evidence: tests.md maps finite observations; other branches remain source review only. ### argument_filter Comma split filters empty args; empty and repeated commas are indistinguishable after decode. Operator: stated relation on this source projection. Assumptions: named domain and unchanged dependencies. Evidence: tests.md maps finite observations; other branches remain source review only. ### verb_normalization All underscores become spaces; literal underscore cannot roundtrip as underscore through encoding/decoding. Operator: stated relation on this source projection. Assumptions: named domain and unchanged dependencies. Evidence: tests.md maps finite observations; other branches remain source review only. ### display_loss show joins role words with spaces and no delimiter escaping, so text observation cannot identify patient versus argument boundaries uniquely. Operator: stated relation on this source projection. Assumptions: named domain and unchanged dependencies. Evidence: tests.md maps finite observations; other branches remain source review only. ### tests #### Checks and evidence External run label: octopus-wave31-court-2026-10-31; exact commands in native-commands.json, per-source observations in source-test-map.json, numeric exits and named outcomes in raw logs. 19 exact selected native tests twice debug and twice release execute actual linked code on bounded hand-built cases. CLI covers argument helpers only. Full extraction/model initialization, actual jurisdiction loading, protocol disk errors, resource exhaustion and malformed public lattices are unexecuted. Module declarations have compile evidence only. Three compiled source-behavior mutants: count weight, precedence tie, modal tie; each requires compile success, named assertion failure, exact byte/hash restoration and positive rerun. Legacy fixture interventions count separately. Final observations: external evidence-summary.md. This node observes: Clause text encoder/decoder and display projection.. Unmapped models remain source-derived/prospective, not verified by the whole test count. Parent source witness map: [source-evidence.md](https://md.groupants.elamur.ai/free/en/mova/yom-hadin/src/rule.rs.groupant/#source-evidence). Only the described fragment observation is supported; parent test names do not imply every fragment branch executed. ### invariant-and-cost ## Invariant and cost ### Invariant For a nonempty verb not beginning '!' and containing neither underscore nor slash, patient None or nonempty excluding slash and literal '-', and all arguments nonempty with neither comma nor slash, dec(enc(c))=c. Empty arguments and positive literal leading '!' verbs fall outside this sufficient roundtrip domain. ### Cost O(clause bytes) allocation and traversal. Symbolic bounds, not timings. Resource exhaustion is not tested.