Mo7art/Stack2Graph_KG_php

1---2tags:3  - knowledge-graph4  - rdf5  - n-triples6  - sparql7  - semantic-web8  - stackoverflow9  - question-answering10pretty_name: StackOverflow Knowledge Graph - PHP11license: cc-by-sa-4.012size_categories:13  - 100M<n<1B14---15 16# PHP StackOverflow Knowledge Graph17 18## Summary19 20This Hugging Face dataset repository contains the PHP shard of the Stack2Graph StackOverflow Knowledge Graph.21Hugging Face uses one dataset repository per programming language, so this repository is directly cloneable without an extra top-level archive wrapper.22 23The artifact is optimized for graph-based retrieval, SPARQL analytics, and retrieval-augmented question answering over Stack Overflow content.24 25Stack2Graph source:26[https://github.com/tha-atlas/Stack2Graph](https://github.com/tha-atlas/Stack2Graph)27 28## Hugging Face Repository Layout29 30```text31README.md32schema.nt33php/34  part0.nt35  part1.nt36  ...37```38 39- `README.md`: Hugging Face dataset card rendered from this template.40- `schema.nt`: shared ontology and schema triples.41- `php/part*.nt`: PHP instance triples serialized as N-Triples.42 43 44## Data Model And Coverage45 46The graph links Stack Overflow entities and relations, including questions, answers, comments, tags, vote aggregates, and question-to-question links.47 48Coverage scope:49 50- records are retained when they match the Stack2Graph supported language-tag set51- this repository contains only the PHP shard52- a question may appear in more than one language repository when it has multiple programming-language tags53 54## Recommended Use55 56Use 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.57 58Load `schema.nt` and the files under `php/` into an RDF-capable store. Map language triples to named graph:59 60```text61http://stackoverflow.com/php62```63 64Example language-scoped query:65 66```sparql67SELECT ?s ?p ?o68WHERE {69  GRAPH <http://stackoverflow.com/php> {70    ?s ?p ?o71  }72}73LIMIT 10074```75 76## Restore With Stack2Graph77 78You do not need to rebuild triples from XML to use this dataset.79 80Typical workflow:81 821. Clone Stack2Graph and configure `.env` with service paths and an HF token.832. Start local services:84 85```bash86docker compose up -d87```88 893. Download and prepare the knowledge graph service state:90 91```bash92python -m experiment.sources.hf93```94 95## Quality Notes96 97- Vote information is represented as aggregates, not raw individual vote events.98- Not all moderation context or full revision history is represented.99- Community-generated Stack Overflow content may contain errors, outdated information, bias, or temporal drift.100 101## License And Attribution102 103This dataset is derived from Stack Overflow content and is distributed under `CC-BY-SA-4.0`.104Preserve required attribution and license notices when redistributing derived artifacts.105 106## Citation107 108If you use this dataset, cite the Stack2Graph project and preserve Stack Overflow attribution requirements:109 110- 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.111