README.md

---
license: cc-by-4.0
language:
  - en
pretty_name: codeofpaper (paper ↔ code graph)
size_categories:
  - 100K<n<1M
tags:
  - reproducibility
  - github
  - arxiv
  - research-software
  - paper-code-linking
configs:
  - config_name: papers
    data_files: papers.parquet
  - config_name: repositories
    data_files: repositories.parquet
  - config_name: paper_repositories
    data_files: paper_repositories.parquet
  - config_name: repository_forks
    data_files: repository_forks.parquet
---

# codeofpaper: paper ↔ code graph

A high-precision dataset linking research papers (arXiv, OpenReview) to their
**official** and **high-confidence community** GitHub implementations, plus
the full fork lineage for those repositories. Built and maintained by the
[codeofpaper](https://codeofpaper.com) project.

**Snapshot date:** 2026-05-19
**Schema version:** 1.0.0
**License:** CC-BY-4.0 (metadata aggregation + derived tier labels).
Underlying paper texts and repository code remain under their own licenses;
this dataset only ships identifiers, URLs, and structured metadata.

## What's in here

- **Tiered repo links**: every edge is classified as `official` or
  `high_confidence_community` by a reproducible classifier. Lower-confidence
  edges (`possible_match`) are intentionally excluded from the published
  snapshot to keep precision high.
- **Fork lineage**: `repository_forks` covers ~1.5M fork edges across ~89k
  parent repos, enabling research-fork discovery: hardware ports, quantization
  variants, lab extensions, and other derivative work that's normally
  invisible in paper ↔ code link tables.
- **Engineering metadata**: `repositories.framework`, `license_spdx`,
  `engineering_fields_evidence` (JSONB) carry the signals our tier classifier
  consumes, so you can audit or train your own.

## Files

| File | Rows | Description |
|------|------|-------------|
| `papers.parquet` | 244,180 | Paper metadata (arXiv / OpenReview / DOI). |
| `repositories.parquet` | 59,296 | Non-blocklisted GitHub repos linked to at least one paper. |
| `paper_repositories.parquet` | 62,634 | Confident-tier edges only (`official` ∪ `high_confidence_community`). |
| `repository_forks.parquet` | 543,340 | Fork lineage for parents in `repositories.parquet`. |

## Schema notes

- All `*_evidence`, `languages`, and other JSONB columns are serialized as
  compact JSON strings (parquet doesn't natively map nested types well across
  loaders). Parse with `json.loads()` in Python.
- `paper_repositories.tier_evidence` documents *why* the classifier assigned a
  tier, useful for auditing or retraining your own classifier.
- A 90-day cutoff on `papers.published_date` is applied. The most recent
  papers (and their newly-linked repos) intentionally aren't in this snapshot.

## Quickstart

```python
from datasets import load_dataset

papers = load_dataset("codeofpaper/paper-code-graph", name="papers", split="train")
repos = load_dataset("codeofpaper/paper-code-graph", name="repositories", split="train")
links = load_dataset("codeofpaper/paper-code-graph", name="paper_repositories", split="train")
forks = load_dataset("codeofpaper/paper-code-graph", name="repository_forks", split="train")

# Find the official implementation for a paper
import polars as pl
df_links = pl.from_arrow(links.data.table)
df_repos = pl.from_arrow(repos.data.table)
(df_links.filter(pl.col("tier") == "official")
         .join(df_repos, left_on="repository_id", right_on="id")
         .select(["paper_id", "full_name", "stars", "framework"]))
```

## Refresh cadence

Republished monthly. Production data updates daily on
[codeofpaper.com](https://codeofpaper.com), but the public snapshot ships
on a 90-day delay to avoid freshness contracts.

## Citation

If you use this dataset, please cite:

```bibtex
@misc{codeofpaper_2026,
  title = {codeofpaper: paper-code graph},
  author = {codeofpaper contributors},
  year = {2026},
  url = {https://huggingface.co/datasets/codeofpaper/paper-code-graph},
}
```

## Project

Product: <https://codeofpaper.com>. The classifier rubric, build script, and
methodology will be open-sourced alongside the first public release of the
codeofpaper repository.

Build metadata: schema `1.0.0`, git SHA `b7ae3a7eace01038093aff1918b9c09754dd088a`.