# Canonical Schema `streaming_omni_v0.3.1`

Every row contains `schema_version`, a unique `id`, config/split/source lineage, modalities, duration, a non-empty timeline, evidence, quality metadata, and `metadata.media_access`.

Every timeline chunk has a deterministic `chunk_0000`-style ID, monotonic `t_start < t_end`, streaming ASR/OCR/audio/visual events, control state, and optional target deltas. Chunk times stay inside `duration_sec`.

`metadata.media_access` declares exactly one public strategy: `reconstruct` with a stable upstream URL and manifest entry, or `generated` with a deterministic recipe. The internal package rewrites it to `included` with a package-relative path.

## ProactiveAVInteraction

`interaction_policy` includes `should_speak`, `speak_timing`, `trigger_type`, `reason_for_silence`, resolvable `evidence_chunk_ids`, optional latency, priority, and interruption permission. A `genuinely_joint` label is used only when both independent audio and visual evidence are materially required.

## OCRScreenGrounding

`ocr_grounding` includes `required`, non-empty `text_instances`, normalized `[x1,y1,x2,y2]` boxes, frame timestamps, confidence, source, resolvable `target_instance_ids`, and temporal state fields. Generated examples use `source=generator_ground_truth`; no generator truth is presented as OCR-model inference.

## Model mode and quality

`metadata.model_mode` records backend modes. `quality.status` must be `pass` for release rows. WhisperX timestamps are segment-level.