---
tags:
  - knowledge-graph
  - rdf
  - n-triples
  - sparql
  - semantic-web
  - stackoverflow
  - question-answering
pretty_name: StackOverflow Knowledge Graph - Haskell
license: cc-by-sa-4.0
size_categories:
  - 100M<n<1B
---

# Haskell StackOverflow Knowledge Graph Datasheet

## 1. What This Dataset Is

This dataset is the Haskell-specific RDF shard of the Stack2Graph StackOverflow Knowledge Graph.
Each Hugging Face dataset repository contains exactly one language dataset.

It is optimized for graph-based retrieval and SPARQL analytics (not row-wise tabular training input).

It is used in the Stack2Graph paper for evaluating retrieval-based question answering and knowledge graph research on programming topics.

See the Stack2Graph repository for more details:
[https://github.com/tha-atlas/Stack2Graph](https://github.com/tha-atlas/Stack2Graph)

## 2. Repository Layout

```text
schema.nt
haskell/
  part0.nt
  part1.nt
  ...
```

- `schema.nt`: shared ontology and schema triples.
- `haskell/part*.nt`: language-scoped instance triples serialized as N-Triples.

## 3. Data Model And Coverage

The graph links Stack Overflow entities and relations, including:

- questions
- answers
- comments
- tags
- vote aggregates
- question-to-question links

Coverage scope:

- records are retained when they match the Stack2Graph supported language-tag set
- this repository contains only the Haskell shard

## 4. Recommended Preprocessing

1. Load `schema.nt` and all triples from `haskell/` into an RDF-capable store.
2. Map language triples to named graph `http://stackoverflow.com/haskell`.
3. Keep schema triples available for graph-aware query planning.
4. Preserve attribution and license metadata during downstream export.

Example language-scoped query:

```sparql
SELECT ?s ?p ?o
WHERE {
  GRAPH <http://stackoverflow.com/haskell> {
    ?s ?p ?o
  }
}
LIMIT 100
```

## 5. Automatic Download And KG Setup

You do not need to rebuild triples from XML to use this dataset.

In the Stack2Graph repository, you can use the automation script
`experiment/load_hf_datasets_into_services.py` to download dataset artifacts
and prepare the knowledge graph service state automatically.

Typical workflow:

1. Clone and configure Stack2Graph (`.env` with HF token and service paths).
1. Start required local services:

```bash
docker compose up -d
```

1. Run the loader script:

```bash
python -m experiment.load_hf_datasets_into_services
```

For manual usage without automation, you can directly load `schema.nt` and all
triples from `haskell/` into your RDF store.

## 6. Quality Notes And Caveats

- A Stack Overflow question may belong to multiple language shards when tagged with multiple languages.
- Vote information is represented as aggregates, not raw individual vote events.
- As with community-generated data, content may include noise, bias, and temporal drift.

## 7. Intended Use

- retrieval and question-answering systems
- RAG and hybrid retriever experiments
- knowledge graph benchmarking and diagnostics
- language-scoped developer tooling research

## 8. Limitations

- Not a complete mirror of all Stack Overflow content.
- Not all moderation context or full revision history is represented.
- Best used with graph infrastructure that supports named graphs and SPARQL.

## 9. Licensing And Attribution

This dataset inherits Stack Overflow source licensing and attribution requirements.
Ensure compliant attribution and redistribution practices in all derived artifacts.

## 10. Suggested Citation

If you use this dataset, cite the Stack2Graph work:

- Stack2Graph: A Structured Knowledge Representation of Stack Overflow Data for Retrieval-based Question Answering