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README.md

@@ -1,39 +1,40 @@
 ---
-dataset_info:
-  features:
-  - name: book_id
-    dtype: string
-  - name: text
-    dtype: string
-  - name: spans
-    list:
-    - name: start
-      dtype: int64
-    - name: end
-      dtype: int64
-    - name: label
-      dtype: string
-  - name: in_scope_layers
-    list: string
-  splits:
-  - name: train
-    num_bytes: 152600214
-    num_examples: 217
-  - name: validation
-    num_bytes: 19881207
-    num_examples: 25
-  - name: test
-    num_bytes: 24789618
-    num_examples: 24
-  download_size: 57731247
-  dataset_size: 197271039
-configs:
-- config_name: default
-  data_files:
-  - split: train
-    path: data/train-*
-  - split: validation
-    path: data/validation-*
-  - split: test
-    path: data/test-*
+language:
+- bo
+license: other
+task_categories:
+- token-classification
+pretty_name: Tibetan Annotation Layer Detection
+tags:
+- tibetan
+- openpecha
+- ner
+- quotation
+- span-detection
+size_categories:
+- n<1K
+source_datasets:
+- tsadra/OpenPecha
 ---
+
+# Tibetan Annotation Layer Detection
+
+Book-level dataset for multi-layer span detection in classical Tibetan texts (OpenPecha / tsadra). Each row is one book: raw text + cleaned character-offset spans across seven modeled annotation layers.
+
+## Schema
+
+| Column | Type | Description |
+|---|---|---|
+| `book_id` | string | OpenPecha book id (e.g. `P000010`) |
+| `text` | string | Full book text (`base/v001.txt`) |
+| `spans` | list of `{{start, end, label}}` | Inclusive character offsets; label is one of `QUOTATION`, `SABCHE`, `TSAWA`, `YIGCHUNG`, `CHAPTER`, `AUTHOR`, `BOOKTITLE` |
+| `in_scope_layers` | list of string | Layers this book is in-scope for (absent spans are trustworthy negatives) |
+
+Splits: `train` / `validation` / `test` (book-level stratified split; never split inside a book).
+
+## Data quality notes
+
+- **512 invalid spans dropped** (480 Quotation, 30 Chapter, 2 Yigchung) — all   `inverted_empty_start_eq_end_plus_1`; none recoverable.
+- **Citation excluded** — only 2 books, 88% invalid.
+- **Author / BookTitle** are in model scope experimentally (~1 span/book); may   be demoted to metadata-only if they underperform.
+- Spans are **not** pre-combined into BIO tags — overlapping spans are preserved   at full fidelity; priority resolution happens at training time.