| --- |
| license: other |
| license_name: mixed-per-document |
| task_categories: |
| - text-generation |
| - question-answering |
| language: |
| - en |
| tags: |
| - data-engineering |
| - documentation |
| - corpus |
| - retrieval |
| size_categories: |
| - 10K<n<100K |
| configs: |
| - config_name: default |
| data_files: "corpus-*.parquet" |
| --- |
| |
| # DE-Corpus v0 |
|
|
| **31,216 cleaned technical documents** on data engineering: official documentation, GitHub issues and pull |
| requests, Apache JIRA tickets, PEPs, PostgreSQL manuals and arXiv papers. This is the source material from |
| which [DE-Bench](https://huggingface.co/datasets/dataenglm/de-bench) was written. |
|
|
| ## ⚠️ There is no single licence for this corpus |
|
|
| **Do not treat this as one licensed work.** Every document carries its own `license` and `source_url`, and |
| both must be preserved if you redistribute any of it. |
|
|
| | Licence | Documents | Share | |
| |---|---|---| |
| | Apache-2.0 | 20,543 | 65.8% | |
| | MIT | 2,928 | 9.4% | |
| | Public Domain | 2,097 | 6.7% | |
| | PSF License | 1,936 | 6.2% | |
| | PostgreSQL | 1,843 | 5.9% | |
| | **CC-BY-4.0** | 695 | 2.2% | |
| | BSD-3-Clause | 652 | 2.1% | |
| | MPL-2.0 | 522 | 1.7% | |
|
|
| **The 695 CC-BY-4.0 documents require attribution.** The `source_url` column *is* that attribution — keep it. |
|
|
| **Share-alike material was removed.** 24 documents (chunks of two arXiv papers) were CC-BY-SA-4.0 and are |
| excluded, because share-alike obligations propagate to derivative works. No DE-Bench item cites either |
| paper, which was verified rather than assumed. |
|
|
| If you need a single-licence subset, filter on the `license` column. Filtering to Apache-2.0 alone still |
| leaves 20,543 documents. |
|
|
| ## Composition |
|
|
| | Source type | Documents | |
| |---|---| |
| | Official documentation | 26,333 | |
| | GitHub issues | 1,938 | |
| | Apache JIRA tickets | 1,355 | |
| | GitHub pull requests | 1,119 | |
| | arXiv papers | 471 | |
|
|
| Coverage is deepest on Kafka, Python, Flink, dbt, PostgreSQL, Spark, DuckDB, Dagster and Airflow, and |
| thinner on Debezium, Schema Registry, Prefect and pandera. **Commercial warehouses (Snowflake, BigQuery, |
| Redshift) are essentially absent**, because only open-source documentation was collected — worth knowing |
| before using this for retrieval on those platforms. |
|
|
| Fields: `doc_id`, `source_type`, `source_url`, `license`, `title`, `content`, `project`, `tags`, |
| `word_count`, `lang`, `quality_score`, `scraped_at`. |
|
|
| ## Processing |
|
|
| Scraped between 2026-09-15 and 2026-09-21, then text-extracted, cleaned, PII-scrubbed and deduplicated. |
| Long documents are split into sections, so several rows can share a `source_url` — `doc_id` is the unique |
| key, not `source_url`. |
|
|
| ## Uses and limits |
|
|
| Reasonable uses: retrieval-augmented data-engineering assistants, domain pretraining or continued |
| pretraining, and studying documentation coverage across the ecosystem. |
|
|
| Things to be careful about: |
|
|
| - **Snapshot, not a feed.** Documentation reflects tool versions as of 2026-09-21 and has since moved on. |
| Nothing here is updated. |
| - **Not reproducible by re-scraping.** The sites change continuously; re-running the scrapers yields a |
| different corpus. This snapshot is the artifact. |
| - **Do not use it to evaluate models on DE-Bench.** Benchmark items were written *from* this corpus. Using |
| it as retrieval context turns the benchmark into an open-book test, which is a valid experiment but is not |
| comparable to a closed-book leaderboard score — and the benchmark's contamination numbers are measured |
| against this corpus specifically. |
| - **PII scrubbing is best-effort.** It removed emails and similar identifiers from structured fields; |
| residual personal names remain in free-text issue and JIRA discussions, which are public by origin. |
|
|
| ## Licence notice |
|
|
| Each document remains under the licence recorded in its `license` field, held by its original authors. This |
| collection adds no new licence over the documents and claims none. Attribution requirements (CC-BY-4.0) and |
| notice requirements (Apache-2.0, MPL-2.0, BSD-3-Clause) travel with the individual documents. |
|
|
