Improve dataset card with description and task category

README.md

@@ -1,9 +1,55 @@
 ---
-license: cc-by-sa-4.0
 language:
 - zh
+license: cc-by-sa-4.0
 configs:
-  - config_name: Data
-    data_files: CaseGen.json
+- config_name: Data
+  data_files: CaseGen.json
+task_categories:
+- text-generation
+tags:
+- legal
+- chinese
+- multi-stage-generation
 ---
 
+# CaseGen: A Benchmark for Multi-Stage Legal Case Documents Generation
+
+<div align="center">
+<img src="./fig/CaseGen.png" style="width: 40%;height: 40%">
+</div>
+
+**CaseGen** is a benchmark designed to evaluate large language models (LLMs) in the generation of legal case documents in the Chinese legal domain. The dataset includes 500 real-world legal case instances, each structured into seven sections: Prosecution, Defense, Evidence, Events, Facts, Reasoning, and Judgment. It supports four key tasks: drafting defense statements, writing trial facts, composing legal reasoning, and generating judgment results.
+
+This repository contains both the dataset and the code for evaluating the performance of LLMs in generating legal case documents. It provides a multi-stage generation task framework and an automated evaluation pipeline using LLMs as evaluators.
+
+
+## Task Description
+
+CaseGen includes four key tasks:
+
+1. **Drafting Defense Statements**: Respond to the prosecution’s claims based on evidence.
+2. **Writing Trial Facts**: Construct trial facts by verifying the true course of events.
+3. **Composing Legal Reasoning**: Analyze the case facts and apply legal principles for the court's reasoning.
+4. **Generating Judgment Results**: Formulate the final ruling based on trial facts and legal reasoning.
+
+
+## Data
+
+The data was collected from publicly available legal resources, with a strong emphasis on maintaining data integrity and quality. The case documents have been pre-processed and annotated by legal experts. Evidence details are annotated for completeness, and the data is formatted in JSON for ease of use.
+An example of a case is:
+```json
+{
+    "id": 0,
+    "title": " ",
+    "full_text": " ",
+    "defense": " ",
+    "fact": " ",
+    "reasoning": " ",
+    "event": { },
+    "evidence": { }
+}
+```
+
+## License
+CaseGen is released under the **CC BY-NC-SA 4.0** license. It is available for non-commercial academic use. Commercial use requires additional authorization.