| # Planned Parquet schema |
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| Schema version: `bagpiper-self-contained-parquet-v1`. |
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| Every row contains one complete natural-language-guided synthesis example and |
| its encoded audio. Parquet shards target approximately 256 MiB and never split |
| an example. |
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|
| | Field | Type | Description | |
| |---|---|---| |
| | `row_id` | string | Globally unique `source_subset:example_id` release key | |
| | `example_id` | string | Original source identifier | |
| | `partition` | string | One of the six public application names | |
| | `source_subset` | string | Internal source corpus retained for provenance | |
| | `split` | string | Release split, initially `train` | |
| | `direction` | string | `text_to_audio` | |
| | `messages` | list of structs | Ordered `{role, modality, content, audio_index}` conversation | |
| | `audio` | struct | `{path, bytes}` containing the complete encoded target audio | |
| | `audio_sha256` | string | SHA-256 of encoded audio bytes | |
| | `audio_bytes` | int64 | Encoded byte length | |
| | `audio_format` | string | Source container/codec suffix | |
| | `sample_rate` | int32 | Decoded sample rate | |
| | `channels` | int16 | Channel count | |
| | `num_frames` | int64 | Decoded frame count | |
| | `duration_seconds` | float64 | Decoded duration | |
| | `metadata_json` | string | Sanitized source annotations; no paths or usernames | |
| | `source_revision` | string | Pinned raw Hugging Face source revision | |
| | `schema_version` | string | `bagpiper-self-contained-parquet-v1` | |
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|
| Text is preserved verbatim. The audio-message content is replaced with a |
| portable display filename and points to the embedded `audio` value by |
| `audio_index`; no private source path is retained. |
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| All rows use exactly this message pattern and contain no system role: |
| `user:text → assistant:text → assistant:audio`. Every row contains exactly one |
| audio object. Intended reuse of valid audio across rows is preserved. |
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