---
license: unknown
license_link: https://openlibrary.org/developers/licensing
pretty_name: OpenLibrary Dump (2024-04-30)
size_categories:
- 10M<n<100M
configs:
- config_name: dumps
  default: true
  data_files:
  - split: authors
    path: "data/parquet/ol_dump_authors_2024-04-30.parquet"
  - split: works
    path: "data/parquet/ol_dump_works_2024-04-30.parquet"
  - split: editions
    path: "data/parquet/ol_dump_editions_2024-04-30.parquet"
- config_name: summaries
  data_files:
  - split: authors
    path: "summaries/parquet/ol_dump_authors_2024-04-30_summary.parquet"
  - split: works
    path: "summaries/parquet/ol_dump_works_2024-04-30_summary.parquet"
  - split: editions
    path: "summaries/parquet/ol_dump_editions_2024-04-30_summary.parquet"
---

# OpenLibrary Dump (2024-04-30)

This dataset contains the [OpenLibrary dump](https://openlibrary.org/developers/dumps) of April 2024 converted to Parquet and DuckDB for easier querying.

## Formats

### Original GZIP dumps

The original GZIP dumps are available at [data/dumps](https://huggingface.co/datasets/storytracer/openlibrary_dump_2024-04-30/tree/main/data/dumps). The dumps are gzipped TSV files with the original OL JSON record contained in the fifth column of the TSV.

### DuckDB

The authors, works and editions dumps were imported as tables into [data/duckdb/ol_dump_2024-04-30.duckdb](https://huggingface.co/datasets/storytracer/openlibrary_dump_2024-04-30/blob/main/data/duckdb/ol_dump_2024-04-30.duckdb) using the script [ol_duckdb.sh](https://huggingface.co/datasets/storytracer/openlibrary_dump_2024-04-30/blob/main/ol_duckdb.sh). The scripts extract the JSON record from the fifth column and pipes it to DuckDB to import using the flags ```union_by_name=true``` and ```ignore_errors=true``` to account for the inconsistent JSON structure of the dumps.

### Parquet

The authors, works and editions tables were exported as Parquet from DuckDB to [data/parquet](https://huggingface.co/datasets/storytracer/openlibrary_dump_2024-04-30/tree/main/data/parquet). These Parquet files are contained in the default ```data``` config for this dataset.

### Table Summaries

To give users an easy overview of the fields contained in the dump, the DuckDB tables have been summarized using the ```SUMMARIZE``` function as Markdown and Parquet files at [summaries](https://huggingface.co/datasets/storytracer/openlibrary_dump_2024-04-30/tree/main/summaries), excluding the summary columns ```min```, ```max```, ```avg``` for easier viewing. You can also explore the table summaries using the dataset viewer by selecting the ```summaries``` config.

The dumps fields are supposed to be consistent with the schema referenced [in the documentation](https://openlibrary.org/developers/dumps#:~:text=Format%20of%20JSON%20records). However, the summaries show that the dumps are not consistent with the documentation: the dumps contain some undocumented fields and some of the fields almost exclusively contain ```null``` values.