Dataset splits — hash-pinned 2026-06-06
Built by scripts/build_canonical.py from data/sir_raw.parquet.
- Seed:
20260606 - Stratified by:
naics_subsector(first 4 digits of Primary NAICS) - Train ratio: 70% | Dev ratio: 15% | Test: remainder
Counts
- total: 103,750
- train: 72,467
- dev: 15,410
- test: 15,873
Test split top subsectors
2381=686, 2382=549, 2362=383, 2131=380, 6221=362, 4451=332, 4931=329, 3116=323
Test split SHA-256
c9490ed3177e63c6128f9e75e91d836b02ce09e464ea8e40f2717f1a15a0148a
The test split MUST NOT be re-shuffled or re-split. If SPLITS.md is
ever regenerated, verify the SHA-256 above is unchanged.