Update metadata/reconstruction.md

metadata/reconstruction.md

@@ -5,7 +5,7 @@
 - QA rows for `eval split` and `sft split` in splits/
 - Split manifests and split counts in splits/
 
-## How to inteprete the QA rows
+## How to Tnteprete the QA Rows
 
 Each row exposes three reconstruction-oriented fields:
 
@@ -15,15 +15,58 @@ Each row exposes three reconstruction-oriented fields:
 
 These are designed to be stable, path-free references. They are sufficient to map a released item back to the corresponding source episode or recording once you have obtained the upstream dataset under its original terms.
 
-## Source-specific units
+## Source-specific Units
 
 - `GM-100`: grouped by `(task_id, episode_id)`.
 - `RH20T`: grouped by `recording_id`.
 - `REASSEMBLE`: grouped by `recording_id`.
 - `AIST-Bimanual`: grouped by `recording_id`.
 
-## Expected workflow
+## Expected Workflow
 
 1. Obtain upstream datasets under their original terms.
 2. Use `source`, `source_task_id`, `source_unit_id`, `camera`, and `frame_indices_json` from the public release.
 3. Reconstruct the required visual inputs with the source-specific evaluation scripts in the main codebase.
+
+## Optional: QA Rows Field Schema
+
+- `item_id`: Stable public item identifier.
+- `split`: `eval` or `sft`.
+- `source`: `GM-100`, `RH20T`, `REASSEMBLE`, or `AIST-Bimanual`.
+- `source_slug`: Short source slug used in release-relative references.
+- `source_task_id`: Source-side task identifier without local paths.
+- `source_unit_type`: Split-isolation unit type, e.g. `episode` or `recording`.
+- `source_unit_id`: Public unit identifier without local paths.
+- `task_id`: Canonical paper task ID `T1` ... `T12`.
+- `task_name`: Canonical paper task name.
+- `task_type_legacy`: Legacy engineering task name when it differs from paper naming.
+- `input_type`: Public input format description.
+- `question`: Public question text.
+- `choice_A` ... `choice_F`: Flattened answer choices.
+- `answer`: Public answer label in the release schema.
+- `answer_text`: Public answer text mapped from `answer`.
+- `num_choices`: Number of non-null answer choices.
+- `num_frames`: Number of referenced frames.
+- `frame_indices_json`: JSON-encoded frame indices.
+- `display_labels_json`: JSON-encoded panel labels such as `["X", "Y"]` or `["X", "Z", "Y"]`.
+- `camera`: Source camera identifier when available.
+- `arm_type`: Source-side arm configuration tag when available.
+- `visual_ref`: Release-relative visual reference string. This is not a local filesystem path.
+- `source_episode_ref`: Release-relative source unit reference.
+- `reconstruction_key_json`: Minimal JSON payload needed to reconstruct the sample with upstream data and source-specific scripts.
+- `task_meta_in_source`: Whether source-side task metadata/context exists upstream.
+- `task_meta_public`: Always `false` in this release build. Separate structured task-meta fields are intentionally withheld.
+- `split_version`: Current split version.
+- `split_group_id`: Source-side split group identifier.
+- `builder_version`: Public builder version tag.
+- `prompt_version`: Public prompt-serialization version tag.
+- `sft_target`: SFT-only supervised target string. Present only in `processdata_sft.*`.
+
+### Notes
+
+- `T5` is equivalent to `T_progress`.
+- `T8` is equivalent to `T_temporal`.
+- `T9` is equivalent to `T_binary`.
+- `T8` is normalized into six explicit permutation choices so the public table remains flat and Parquet-friendly.
+- `T9` is normalized to `A/B` choices even when the source data originally used `X/Y`.
+