---
tags:
  - openlibrary
  - bibliographic
  - books
  - parquet          # ← list items start with “-”, not “*”

license: cc0-1.0      # recognised by the Hub

configs:
  - config_name: authors
    data_files: 'authors/*.parquet'     # quote any value that contains “*”
    description: All OpenLibrary author records.

  - config_name: editions
    data_files: 'editions/*.parquet'
    description: All book-edition records (ISBN-level).

  - config_name: works
    data_files: 'works/*.parquet'
    description: Abstract “work” records (title-level).
---

# 📚 OpenLibrary Parquet Mirror

An up‑to‑date, stream‑ready mirror of the official **OpenLibrary** public data dumps, converted to snappy‑compressed Parquet.

> **Source:** [https://openlibrary.org/developers/dumps](https://openlibrary.org/developers/dumps)

## 💾 Repository organization

```
openlibrary/
├── authors/   # authors_0.parquet, authors_1.parquet, … (≈ 1-2 GB each)
├── editions/  # editions_0.parquet, editions_1.parquet, …
└── works/     # works_0.parquet, works_1.parquet, …
```

## 🏃 Quick start

```python
from datasets import load_dataset

# stream authors only
authors = load_dataset("sayshara/openlibrary", "authors", split="train", streaming=True)
for i, rec in enumerate(authors):
    if i == 5:
        break
    print(rec["name"], rec.get("birth_date"))
```

## 📝 Schema notes

* Missing columns for a given record are stored as `NULL`.
* Top‑level JSON objects from the dump are flattened; nested structures are preserved as JSON‑encoded strings.
* The raw JSON produced by OpenLibrary loosely follows per‑entity schemata maintained in the [`openlibrary‑client` repo](https://github.com/internetarchive/openlibrary-client/tree/master/olclient/schemata):

  * [`authors.schema.json`](https://github.com/internetarchive/openlibrary-client/blob/master/olclient/schemata/author.schema.json)
    → governs objects from **`ol_dump_authors_latest.txt.gz`**.
  * [`editions.schema.json`](https://github.com/internetarchive/openlibrary-client/blob/master/olclient/schemata/edition.schema.json)
    → governs objects from **`ol_dump_editions_latest.txt.gz`**.
  * [`works.schema.json`](https://github.com/internetarchive/openlibrary-client/blob/master/olclient/schemata/work.schema.json)
    → governs objects from **`ol_dump_works_latest.txt.gz`**.

| Field example     | Type   | Notes                                |
| ----------------- | ------ | ------------------------------------ |
| `key`             | string | e.g. `/authors/OL23919A`             |
| `latest_revision` | double | revision id (via OL)                 |
| `birth_date`      | string | free‑text date                       |
| `remote_ids`      | string | JSON string of `{"wikidata": "Q42"}` |

---
## 📜 License

OpenLibrary dedicates its catalog data to the **public domain** under the
[CC0 1.0 Universal (Public‑Domain Dedication)](https://creativecommons.org/publicdomain/zero/1.0/) license. 

For more information, see: [https://openlibrary.org/help/faq/using](https://openlibrary.org/help/faq/using)

Because this Parquet mirror is a direct transformation of that catalog, **all
files in this dataset are likewise released under CC0 1.0**.  You may copy,
modify, redistribute, and use them for any purpose without permission or
attribution.  (Attribution to OpenLibrary/Internet Archive is appreciated but
not legally required.)

---

Maintainer • [@sayshara](https://huggingface.co/sayshara)