| license: other | |
| license_name: bsd-3-clause-with-data-dependency | |
| license_link: https://github.com/interscript/interscript-models/blob/main/cards/urd-diac-base-1.0.md | |
| language: | |
| - ur | |
| tags: | |
| - diacritization | |
| - byt5 | |
| - imf | |
| - urdu | |
| metrics: | |
| - cer | |
| # urd-diac-base-1.0 | |
| Urdu diacritization, base tier (run-066): byt5-base seq2seq on the | |
| full 573,130-pair urdu-diacrit corpus. IMF v1 **fp16**. | |
| ## Metrics (full 11,940-row test split, raw char CER, row-mean) | |
| CER **3.57** (urd-diac-1.0 small tier: 3.77 baseline) — gate PASSED. | |
| Word accuracy 69.8%. | |
| ## Artifact parity (WO51 contract) | |
| Single-row greedy decode, the runtime's actual decode mode: ONNX | |
| artifact CER **3.64** — identical to torch on **500/500 rows** | |
| (agreement 1.0; three-way bf16/fp32/ORT agreement 1.0). Batched | |
| decode without an attention mask is outside the artifact contract | |
| (CONFORMANCE.md). | |
| ## Conformance | |
| The shipped runtime reproduces all 12 frozen vectors byte-exactly | |
| (`conformance/urd-diac-base-vectors.json`). | |
| ## Data / license | |
| Weights depend on the original training-data license (the urdu-diacrit | |
| corpus; provenance in `corpora/PROVENANCE.md`, owner-approved ship | |
| decision 2026-10-18). Code and weights: BSD-3-Clause. | |