| --- |
| tags: |
| - knowledge-graph |
| - rdf |
| - n-triples |
| - sparql |
| - semantic-web |
| - stackoverflow |
| - question-answering |
| pretty_name: StackOverflow Knowledge Graph |
| license: cc-by-sa-4.0 |
| size_categories: |
| - 100M<n<1B |
| --- |
| |
| # Dataset Card for StackOverflow Knowledge Graph |
|
|
| ## Summary |
|
|
| This dataset contains the knowledge-graph component of Stack2Graph as language-specific N-Triples shards. |
|
|
| It is the structured counterpart to the Stack2Graph vector dataset and is intended for QLever/SPARQL workflows rather than row-wise tabular use. |
|
|
| ## Repository Layout |
|
|
| ```text |
| kg_rdf/ |
| schema.nt |
| python/ |
| chunk0.nt |
| chunk1.nt |
| java/ |
| chunk0.nt |
| ``` |
|
|
| The repository stores N-Triples RDF files under one folder per programming language. Upload tooling can publish one dataset per language or all configured languages. |
|
|
| Generated source RDF artifacts are partitioned by programming language before upload: |
|
|
| ```text |
| kg_rdf/ |
| schema.nt |
| python/ |
| part0.nt |
| part1.nt |
| java/ |
| part0.nt |
| ``` |
|
|
| ## Content |
|
|
| The graph is generated from Stack Overflow data after SQL ingestion and keeps structural relations between questions, answers, comments, tags, vote aggregates, and question-to-question links. |
|
|
| The root `schema.nt` contains schema triples loaded into the default graph. Language instance triples are mapped to named graphs keyed by the original supported programming-language tag during QLever indexing, for example `http://stackoverflow.com/python`. QLever named graphs are the canonical language rooms. The default graph is a distinct-SPO convenience view over named graph data plus `schema.nt`, so total language KG size should be measured with `GRAPH ?g { ?s ?p ?o }`; use `GRAPH <http://stackoverflow.com/{language}> { ... }` for language-scoped queries. |
|
|
| Questions are only retained when they match the supported language-tag set used by the project. |
|
|
| ## Intended Use |
|
|
| This dataset is meant to be downloaded, extracted, and imported into an RDF-capable graph store for retrieval and analysis workflows. |
|
|
| It is primarily intended for system reconstruction and retrieval-based experiments. |
|
|
| ## Source |
|
|
| The dataset is built from the Stack Overflow dump through the Stack2Graph pipeline, including SQL import, graph construction, N-Triples serialization, and optional archive packaging. |
|
|
| ## Limitations |
|
|
| - The graph only covers questions matching the supported programming-language tags. |
| - A question may appear in more than one named graph when it has multiple language tags. Repeated SPO triples across different language graphs are intentional language-membership duplication; only exact duplicate lines inside a single language file are safe to remove. |
| - Vote information is stored as aggregates rather than individual vote events. |
| - The dataset inherits the licensing constraints, biases, and temporal drift of Stack Overflow content. |
|
|
| ## License |
|
|
| This dataset is distributed under `CC-BY-SA-4.0`. |
|
|
| ## Citation |
|
|
| If you use this dataset, please cite the Stack2Graph paper: |
|
|
| - Stack2Graph: A Structured Knowledge Representation of Stack Overflow Data for Retrieval-based Question Answering |
|
|
