open-standards/aac/vocab/LEXICON.md
Transaction Science ba1212361f Add aac, map, sandbox standards; catalog the standards family
Commit the previously-untracked standard directories and catalog them in the
root README alongside proof:

- aac/    — communication cargo class: portable boards + a ten-level
            offline-first cascade (Apache-2.0 code / CC-BY-4.0 spec).
- map/    — geospatial cargo class: range-requestable signed tilesets +
            an F0–F4 fidelity cascade (Apache-2.0 code / CC-BY-4.0 spec).
- sandbox/— isolated, metered, attested execution across the heterogeneous
            compute fabric (Apache-2.0 code / CC-BY-4.0 spec).
- jouleclaw-otel-authz, jouleclaw-trust — new jouleclaw reference crates.

Root README now lists aac, map, sandbox, and proof in the catalog, the tree,
and the contribution guide.

Co-Authored-By: Claude Opus 4.8 <[email protected]>
2026-06-07 17:04:36 -04:00

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AAC lexicon (v1)

The controlled vocabulary of the AAC standard. Terms are stable; their IRIs live in v1.ttl under https://aac.transaction.science/vocab/v1#.

Term Meaning
Utterance The cargo AAC carries: what a non-speaking person means to say, composed by selecting cells.
Board A communication surface holding cells, of a given board type. The portable unit a voice travels as.
Board type Grid | VisualScene | Keyboard | Hybrid | QuickAccess. A rendering + vocabulary-strategy marker.
Cell A single selectable target at a fixed grid position, with content and an action.
Position (row, col), 0-indexed. Assigned once and immutable for the life of the cell — the motor invariant.
Motor stability The guarantee that cell positions never move except by explicit edit. Muscle memory is sacred.
Cell content Symbol{id,label} | Text | Photo{ref,label} | Blank. Blank is an addressable reservation of geometry.
Cell action What activation does: Speak | Navigate | Modifier | Backspace | Clear | Predict | SpeakAll | Buffer.
Symbol A pictographic word referenced by source and id — not embedded pixels — so a board stays small and portable.
Access method The physical channel of selection: DirectTouch | EyeGaze | HeadTracking | SwitchScan{n} | Joystick | Bci | PartialVoice | Pointer.
Motor profile The user's physical capabilities (fine motor, sustained press, tremor, target size, reach, side) used to adapt targets and timing.
Scan mode The switch-scanning pattern: Linear | RowColumn | Group | Block | inverse.
Dwell Eye-gaze selection by sustained gaze, with visible progress feedback and a fatigue-bounded effective time.
Vocabulary level Emergent | Transitional | Conventional | Literate — the user's stage, which selects the prediction tier.
Cascade L0:Cache → L1:Symbol → L2:LocalPredict → … → L9:AdaptiveModel. The lowest level that closes a request wins.
Offline invariant Exactly L0–L2 are offline-capable and carry 95%+ of communication; a network drop never silences a user.
Free invariant No cascade level is gated behind payment at the protocol layer. A voice is not a metered good.
Interchange Canonical export + one-directional ingest of existing boards. What goes in comes out; no lock-in.
Receipt The per-operation energy record (measured + estimated µJ, provenance-tagged) — shown for transparency, never billed.
Provenance HwShunt (hardware-measured) | ModelBased (calibrated model) | Estimator (constant). The honesty tag on every reading.
Steward Transaction Science: publishes the spec, ships the reference, runs optional services (symbol libraries, voice banking, team coordination). Not the owner — AAC carries no token.