Add DELTA dataset card

README.md

@@ -0,0 +1,92 @@
+---
+license: other
+task_categories:
+- text-classification
+tags:
+- vulnerability-detection
+- software-security
+- code-property-graph
+- retrieval-augmented-generation
+- cwe
+configs:
+- config_name: primevul
+  data_files:
+  - split: train
+    path: primevul/train.parquet
+  - split: val
+    path: primevul/val.parquet
+  - split: test
+    path: primevul/test.parquet
+- config_name: megavul
+  data_files:
+  - split: train
+    path: megavul/train.parquet
+  - split: val
+    path: megavul/val.parquet
+  - split: test
+    path: megavul/test.parquet
+- config_name: crossvul
+  data_files:
+  - split: train
+    path: crossvul/train.parquet
+  - split: val
+    path: crossvul/val.parquet
+  - split: test
+    path: crossvul/test.parquet
+---
+
+# DELTA vulnerability datasets
+
+This repository contains the three benchmark splits used by **DELTA:
+Differential Evidence for LLM Taxonomy-Aware Software Vulnerability
+Detection**.
+
+## Configurations
+
+| config | task | training knowledge base | validation/test |
+|---|---|---|---|
+| `primevul` | single-language | C/C++ | C/C++ |
+| `megavul` | cross-language | C/C++ | Java |
+| `crossvul` | multi-language transfer | C, Go, Java, PHP, TypeScript | C++, C#, JavaScript, Python, Ruby, Rust, Scala |
+
+Each config has `train`, `val` and `test` splits. The training split is the
+knowledge-base construction set. In DELTA, each pair contributes two
+classification items during evaluation: the vulnerable version (label `1`) and
+the fixed version (label `0`).
+
+## Loading
+
+```python
+from datasets import load_dataset
+
+primevul = load_dataset("codemetic/DELTA", "primevul", split="train")
+megavul_java = load_dataset("codemetic/DELTA", "megavul", split="test")
+crossvul = load_dataset("codemetic/DELTA", "crossvul", split="val")
+```
+
+Or use the DELTA code directly:
+
+```bash
+python -m delta.cli run --config configs/primevul.yaml --run-id primevul-full
+```
+
+The loader pulls the data from this repository by default (`data.source: hf`).
+
+## Columns
+
+The parquet files preserve the original benchmark columns, including:
+
+- `vul_code`, `fixed_code`
+- `cwe` or `cwe_id`, and `cwe_description` where available
+- `language` for CrossVul
+- project/CVE metadata for PrimeVul and MegaVul
+
+## Citation
+
+Please cite the DELTA paper. See the project repository for the full author list
+and bibliography.
+
+## Notes
+
+These datasets are redistributed for research convenience. Please also follow
+the terms of the original PrimeVul, MegaVul and CrossVul releases.