Mo7art/Stack2Graph_KG_c

C StackOverflow Knowledge Graph

Summary

This Hugging Face dataset repository contains the C shard of the Stack2Graph StackOverflow Knowledge Graph. Hugging Face uses one dataset repository per programming language, so this repository is directly cloneable without an extra top-level archive wrapper.

The artifact is optimized for graph-based retrieval, SPARQL analytics, and retrieval-augmented question answering over Stack Overflow content.

Stack2Graph source: https://github.com/tha-atlas/Stack2Graph

Hugging Face Repository Layout

README.md
schema.nt
c/
  part0.nt
  part1.nt
  ...

• README.md: Hugging Face dataset card rendered from this template.
• schema.nt: shared ontology and schema triples.
• c/part*.nt: C instance triples serialized as N-Triples.

Data Model And Coverage

The graph links Stack Overflow entities and relations, including questions, answers, comments, tags, vote aggregates, and question-to-question links.

Coverage scope:

• records are retained when they match the Stack2Graph supported language-tag set
• this repository contains only the C shard
• a question may appear in more than one language repository when it has multiple programming-language tags

Recommended Use

Use this dataset for graph retrieval, SPARQL diagnostics, RAG experiments, and knowledge graph research for programming topics. It is not intended as row-wise tabular training input.

Load schema.nt and the files under c/ into an RDF-capable store. Map language triples to named graph:

http://stackoverflow.com/c

Example language-scoped query:

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

Restore With Stack2Graph

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

Typical workflow:

1. Clone Stack2Graph and configure .env with service paths and an HF token.
2. Start local services:

docker compose up -d

3. Download and prepare the knowledge graph service state:

python -m experiment.sources.hf

Quality Notes

• Vote information is represented as aggregates, not raw individual vote events.
• Not all moderation context or full revision history is represented.
• Community-generated Stack Overflow content may contain errors, outdated information, bias, or temporal drift.

License And Attribution

This dataset is derived from Stack Overflow content and is distributed under CC-BY-SA-4.0. Preserve required attribution and license notices when redistributing derived artifacts.

Citation

If you use this dataset, cite the Stack2Graph project and preserve Stack Overflow attribution requirements:

• Kleybolte, L. A., Ventura, V., & Zarcone, A. (2026). Stack2Graph: A Structured Knowledge Representation of Stack Overflow Data for Retrieval-based Question Answering . In Proceedings of the Knowledge Graphs and Large Language Models Workshop (KG-LLM) @ LREC26 (pp. 120-133). European Language Resources Association (ELRA). https://doi.org/10.63317/583q4d3mwbdu.