Add dataset card with metadata and links

README.md

@@ -1,3 +1,27 @@
 ---
 license: cc-by-nc-nd-4.0
+task_categories:
+- text-retrieval
+language:
+- km
+tags:
+- khmer
+- retrieval
+- low-resource
 ---
+
+# KSE-Web3K
+
+This dataset is associated with the paper [KSE-Web: An Analysis of Hybrid Retrieval and LLM-Assisted Query Expansion for Low-Resource Khmer Semantic Search](https://huggingface.co/papers/2608.21365).
+
+It contains 3,000 cleaned full-text Khmer web documents, 300 manually reviewed Khmer search queries, and silver relevance labels. The dataset is designed for sparse, dense, hybrid, and LLM-assisted retrieval experiments.
+
+- **Paper:** [KSE-Web paper](https://huggingface.co/papers/2608.21365)
+- **Code:** [GitHub repository](https://github.com/back-kh/Khmer-Semantic-Search)
+
+The repository provides the following files:
+- `documents.csv` / `documents.jsonl` – document collection (titles, cleaned text, categories, sources, URLs)
+- `queries.csv` – user-style Khmer search queries
+- `qrels_silver_v2.csv` – silver relevance judgments with partial human verification
+
+For usage instructions and evaluation scripts, please refer to the [GitHub README](https://github.com/back-kh/Khmer-Semantic-Search).