Add common-pile tag and link to paper

This PR adds the `common-pile` tag to the dataset, indicating that it is part of the Common Pile collection. Also links the dataset to the Common Pile paper and updates the citation to include the arXiv identifier.

README.md

@@ -1,10 +1,13 @@
 ---
-task_categories:
-- text-generation
 language:
 - en
+task_categories:
+- text-generation
 pretty_name: Directory of Open Access Books
+tags:
+- common-pile
 ---
+
 # Directory of Open Access Books
 
 ## Description
@@ -16,6 +19,8 @@ As an additional validation step, we manually create a whitelist of open license
 Per-document license information is available in the `license` entry of the `metadata` field of each example. 
 Code for collecting, processing, and preparing this dataset is available in the [common-pile GitHub repo](https://github.com/r-three/common-pile).
 
+This dataset is part of [The Common Pile v0.1: An 8TB Dataset of Public Domain and Openly Licensed Text](https://huggingface.co/papers/2506.05209).
+
 ## Dataset Statistics
 | Documents | UTF-8 GB |
 |-----------|----------|
@@ -33,7 +38,7 @@ If you use this dataset, please cite:
 @article{kandpal2025common,
   title={{The Common Pile v0.1: An 8TB Dataset of Public Domain and Openly Licensed Text}},
   author={Nikhil Kandpal and Brian Lester and Colin Raffel and Sebastian Majstorovic and Stella Biderman and Baber Abbasi and Luca Soldaini and Enrico Shippole and A. Feder Cooper and Aviya Skowron and Shayne Longpre and Lintang Sutawika and Alon Albalak and Zhenlin Xu and Guilherme Penedo and Loubna Ben  and Elie Bakouch and John David  and Honglu Fan and Dashiell Stander and Guangyu Song and Aaron Gokaslan and John Kirchenbauer and Tom Goldstein and Brian R and Bhavya Kailkhura and Tyler Murray},
-  journal={arXiv preprint},
+  journal={arXiv preprint arXiv:2506.05209},
   year={2025}
 }
-```
+```