Upload StackOverflow KG language dataset: sql

.gitattributes

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README.md

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+---
+tags:
+  - knowledge-graph
+  - rdf
+  - n-triples
+  - sparql
+  - semantic-web
+  - stackoverflow
+  - question-answering
+pretty_name: StackOverflow Knowledge Graph - SQL
+license: cc-by-sa-4.0
+size_categories:
+  - 100M<n<1B
+---
+
+# SQL StackOverflow Knowledge Graph Datasheet
+
+## 1. What This Dataset Is
+
+This dataset is the SQL-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
+sql/
+  part0.nt
+  part1.nt
+  ...
+```
+
+- `schema.nt`: shared ontology and schema triples.
+- `sql/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 SQL shard
+
+## 4. Recommended Preprocessing
+
+1. Load `schema.nt` and all triples from `sql/` into an RDF-capable store.
+2. Map language triples to named graph `http://stackoverflow.com/sql`.
+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/sql> {
+    ?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 `sql/` 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

schema.nt

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+<http://stackoverflow.com/schema#hasAnswer> <http://www.w3.org/2002/07/owl#inverseOf> <http://stackoverflow.com/schema#answersQuestion> .
+<http://stackoverflow.com/schema#hasText> <http://www.w3.org/2000/01/rdf-schema#comment> "The text content of a comment." .
+<http://stackoverflow.com/schema#Comment> <http://www.w3.org/2000/01/rdf-schema#label> "Comment" .
+<http://stackoverflow.com/schema#hasBody> <http://www.w3.org/2000/01/rdf-schema#label> "has body" .
+<http://stackoverflow.com/schema#tagName> <http://www.w3.org/2000/01/rdf-schema#comment> "The name of a tag." .
+<http://stackoverflow.com/schema#score> <http://www.w3.org/2000/01/rdf-schema#label> "score" .
+<http://stackoverflow.com/schema#taggedWith> <http://www.w3.org/2000/01/rdf-schema#label> "tagged with" .
+<http://stackoverflow.com/schema#tagName> <http://www.w3.org/2000/01/rdf-schema#range> <http://www.w3.org/2001/XMLSchema#string> .
+<http://stackoverflow.com/schema#UnansweredQuestion> <http://www.w3.org/2000/01/rdf-schema#label> "Unanswered Question" .
+<http://stackoverflow.com/schema#favoriteCount> <http://www.w3.org/2000/01/rdf-schema#label> "favorite count" .
+<http://stackoverflow.com/schema#answerCount> <http://www.w3.org/2000/01/rdf-schema#label> "answer count" .
+<http://stackoverflow.com/schema#tagsQuestion> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#Answer> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://stackoverflow.com/schema#Post> .
+<http://stackoverflow.com/schema#tagWikiOf> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Tag> .
+<http://stackoverflow.com/schema#acceptedAnswerOf> <http://www.w3.org/2000/01/rdf-schema#label> "accepted answer of" .
+<http://stackoverflow.com/schema#tagWikiOf> <http://www.w3.org/2000/01/rdf-schema#comment> "Inverse of hasTagWiki (wiki -> tag)." .
+<http://stackoverflow.com/schema#Post> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://stackoverflow.com/schema#Content> .
+<http://stackoverflow.com/schema#Comment> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://stackoverflow.com/schema#Content> .
+<http://stackoverflow.com/schema#hasComment> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Post> .
+<http://stackoverflow.com/schema#AnswerComment> <http://www.w3.org/2000/01/rdf-schema#comment> "A comment associated with an answer." .
+<http://stackoverflow.com/schema#linkedTo> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#downvoteCount> <http://www.w3.org/2000/01/rdf-schema#label> "downvote count" .
+<http://stackoverflow.com/schema#UnansweredQuestion> <http://www.w3.org/2000/01/rdf-schema#comment> "A question that does not have an accepted answer." .
+<http://stackoverflow.com/schema#tagsQuestion> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Tag> .
+<http://stackoverflow.com/schema#acceptedAnswer> <http://www.w3.org/2002/07/owl#inverseOf> <http://stackoverflow.com/schema#acceptedAnswerOf> .
+<http://stackoverflow.com/schema#hasText> <http://www.w3.org/2000/01/rdf-schema#range> <http://www.w3.org/1999/02/22-rdf-syntax-ns#HTML> .
+<http://stackoverflow.com/schema#Question> <http://www.w3.org/2000/01/rdf-schema#label> "Question" .
+<http://stackoverflow.com/schema#hasTitle> <http://www.w3.org/2000/01/rdf-schema#range> <http://www.w3.org/1999/02/22-rdf-syntax-ns#HTML> .
+<http://stackoverflow.com/schema#hasAnswer> <http://www.w3.org/2000/01/rdf-schema#comment> "Links a question to an answer it has." .
+<http://stackoverflow.com/schema#AcceptedAnswer> <http://www.w3.org/2000/01/rdf-schema#comment> "An answer that has been marked as accepted by the question author." .
+<http://stackoverflow.com/schema#Tag> <http://www.w3.org/2000/01/rdf-schema#label> "Tag" .
+<http://stackoverflow.com/schema#upvoteCount> <http://www.w3.org/2000/01/rdf-schema#label> "upvote count" .
+<http://stackoverflow.com/schema#AcceptedAnswer> <http://www.w3.org/2000/01/rdf-schema#label> "Accepted Answer" .
+<http://stackoverflow.com/schema#downvoteCount> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Post> .
+<http://stackoverflow.com/schema#answersQuestion> <http://www.w3.org/2000/01/rdf-schema#label> "answers question" .
+<http://stackoverflow.com/schema#hasComment> <http://www.w3.org/2002/07/owl#inverseOf> <http://stackoverflow.com/schema#commentOn> .
+<http://stackoverflow.com/schema#hasComment> <http://www.w3.org/2000/01/rdf-schema#label> "has comment" .
+<http://stackoverflow.com/schema#hasTagWiki> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#TagWiki> .
+<http://stackoverflow.com/schema#QuestionComment> <http://www.w3.org/2000/01/rdf-schema#comment> "A comment associated with a question." .
+<http://stackoverflow.com/schema#upvoteCount> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Post> .
+<http://stackoverflow.com/schema#hasTagWiki> <http://www.w3.org/2000/01/rdf-schema#label> "has tag wiki" .
+<http://stackoverflow.com/schema#favoriteCount> <http://www.w3.org/2000/01/rdf-schema#range> <http://www.w3.org/2001/XMLSchema#integer> .
+<http://stackoverflow.com/schema#taggedWith> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#Content> <http://www.w3.org/2000/01/rdf-schema#label> "Content" .
+<http://stackoverflow.com/schema#linkedTo> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#hasText> <http://www.w3.org/2000/01/rdf-schema#label> "has text" .
+<http://stackoverflow.com/schema#answersQuestion> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Answer> .
+<http://stackoverflow.com/schema#tagWikiOf> <http://www.w3.org/2000/01/rdf-schema#label> "tag wiki of" .
+<http://stackoverflow.com/schema#hasBody> <http://www.w3.org/2000/01/rdf-schema#comment> "The main content (body) of a post, typically containing HTML." .
+<http://stackoverflow.com/schema#acceptedAnswer> <http://www.w3.org/2000/01/rdf-schema#label> "accepted answer" .
+<http://stackoverflow.com/schema#taggedWith> <http://www.w3.org/2000/01/rdf-schema#comment> "Links a question to a tag it is associated with." .
+<http://stackoverflow.com/schema#duplicateOf> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#downvoteCount> <http://www.w3.org/2000/01/rdf-schema#range> <http://www.w3.org/2001/XMLSchema#integer> .
+<http://stackoverflow.com/schema#Answer> <http://www.w3.org/2000/01/rdf-schema#label> "Answer" .
+<http://stackoverflow.com/schema#answersQuestion> <http://www.w3.org/2000/01/rdf-schema#comment> "Links an answer to the question it answers." .
+<http://stackoverflow.com/schema#AnswerComment> <http://www.w3.org/2000/01/rdf-schema#label> "Answer Comment" .
+<http://stackoverflow.com/schema#commentOn> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Post> .
+<http://stackoverflow.com/schema#acceptedAnswerOf> <http://www.w3.org/2000/01/rdf-schema#comment> "Inverse of acceptedAnswer (answer -> question)." .
+<http://stackoverflow.com/schema#TagWiki> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://stackoverflow.com/schema#Post> .
+<http://stackoverflow.com/schema#hasTitle> <http://www.w3.org/2000/01/rdf-schema#label> "has title" .
+<http://stackoverflow.com/schema#TagWiki> <http://www.w3.org/2000/01/rdf-schema#comment> "Represents the wiki documentation post associated with a tag." .
+<http://stackoverflow.com/schema#AnsweredQuestion> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#possibleBetterAnswer> <http://www.w3.org/2000/01/rdf-schema#comment> "Links a question to an answer that might be better than the accepted one (potentially based on score or other heuristics)." .
+<http://stackoverflow.com/schema#upvoteCount> <http://www.w3.org/2000/01/rdf-schema#comment> "The number of upvotes a post has received." .
+<http://stackoverflow.com/schema#tagWikiOf> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#TagWiki> .
+<http://stackoverflow.com/schema#taggedWith> <http://www.w3.org/2002/07/owl#inverseOf> <http://stackoverflow.com/schema#tagsQuestion> .
+<http://stackoverflow.com/schema#Comment> <http://www.w3.org/2000/01/rdf-schema#comment> "Represents a comment on a Stack Overflow post." .
+<http://stackoverflow.com/schema#hasText> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Comment> .
+<http://stackoverflow.com/schema#hasAnswer> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Answer> .
+<http://stackoverflow.com/schema#AcceptedAnswer> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://stackoverflow.com/schema#Answer> .
+<http://stackoverflow.com/schema#commentOn> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Comment> .
+<http://stackoverflow.com/schema#acceptedAnswerOf> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#duplicateOf> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#linkedTo> <http://www.w3.org/2000/01/rdf-schema#comment> "Indicates that two questions are linked (e.g., related). This relationship is symmetric." .
+<http://stackoverflow.com/schema#AnsweredQuestion> <http://www.w3.org/2000/01/rdf-schema#comment> "A question that has an accepted answer." .
+<http://stackoverflow.com/schema#score> <http://www.w3.org/2000/01/rdf-schema#comment> "The score (upvotes - downvotes) of a post or comment." .
+<http://stackoverflow.com/schema#Content> <http://www.w3.org/2000/01/rdf-schema#comment> "A content item (either a Post or a Comment) that can have a score." .
+<http://stackoverflow.com/schema#tagsQuestion> <http://www.w3.org/2000/01/rdf-schema#comment> "Inverse of taggedWith (tag -> question)." .
+<http://stackoverflow.com/schema#downvoteCount> <http://www.w3.org/2000/01/rdf-schema#comment> "The number of downvotes a post has received." .
+<http://stackoverflow.com/schema#acceptedAnswer> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#duplicateOf> <http://www.w3.org/2000/01/rdf-schema#label> "duplicate of" .
+<http://stackoverflow.com/schema#hasBody> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Post> .
+<http://stackoverflow.com/schema#possibleBetterAnswer> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#Question> <http://www.w3.org/2000/01/rdf-schema#comment> "Represents a question post on Stack Overflow." .
+<http://stackoverflow.com/schema#hasTagWiki> <http://www.w3.org/2002/07/owl#inverseOf> <http://stackoverflow.com/schema#tagWikiOf> .
+<http://stackoverflow.com/schema#Tag> <http://www.w3.org/2000/01/rdf-schema#comment> "Represents a tag used to categorize questions." .
+<http://stackoverflow.com/schema#hasTitle> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Post> .
+<http://stackoverflow.com/schema#linkedTo> <http://www.w3.org/2000/01/rdf-schema#label> "linked to" .
+<http://stackoverflow.com/schema#QuestionComment> <http://www.w3.org/2000/01/rdf-schema#label> "Question Comment" .
+<http://stackoverflow.com/schema#AnsweredQuestion> <http://www.w3.org/2000/01/rdf-schema#label> "Answered Question" .
+<http://stackoverflow.com/schema#UnansweredQuestion> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#upvoteCount> <http://www.w3.org/2000/01/rdf-schema#range> <http://www.w3.org/2001/XMLSchema#integer> .
+<http://stackoverflow.com/schema#Post> <http://www.w3.org/2000/01/rdf-schema#label> "Post" .
+<http://stackoverflow.com/schema#duplicateOf> <http://www.w3.org/2000/01/rdf-schema#comment> "Indicates that a question is considered a duplicate of another question." .
+<http://stackoverflow.com/schema#taggedWith> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Tag> .
+<http://stackoverflow.com/schema#AnswerComment> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://stackoverflow.com/schema#Comment> .
+<http://stackoverflow.com/schema#favoriteCount> <http://www.w3.org/2000/01/rdf-schema#comment> "The number of times a question has been favorited by users." .
+<http://stackoverflow.com/schema#possibleBetterAnswer> <http://www.w3.org/2000/01/rdf-schema#label> "possible better answer" .
+<http://stackoverflow.com/schema#hasAnswer> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#tagName> <http://www.w3.org/2000/01/rdf-schema#label> "tag name" .
+<http://stackoverflow.com/schema#score> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Content> .
+<http://stackoverflow.com/schema#answerCount> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Question> .
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+<http://stackoverflow.com/schema#hasBody> <http://www.w3.org/2000/01/rdf-schema#range> <http://www.w3.org/1999/02/22-rdf-syntax-ns#HTML> .
+<http://stackoverflow.com/schema#Question> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://stackoverflow.com/schema#Post> .
+<http://stackoverflow.com/schema#commentOn> <http://www.w3.org/2000/01/rdf-schema#comment> "Links a comment to the post (question or answer) it is associated with." .
+<http://stackoverflow.com/schema#answersQuestion> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Question> .
+<http://stackoverflow.com/schema#tagName> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Tag> .
+<http://stackoverflow.com/schema#QuestionComment> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://stackoverflow.com/schema#Comment> .
+<http://stackoverflow.com/schema#hasComment> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Comment> .
+<http://stackoverflow.com/schema#answerCount> <http://www.w3.org/2000/01/rdf-schema#comment> "The number of answers a question has." .
+<http://stackoverflow.com/schema#Post> <http://www.w3.org/2000/01/rdf-schema#comment> "Represents a post on Stack Overflow, which can be a question, answer, or tag wiki." .
+<http://stackoverflow.com/schema#acceptedAnswer> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Answer> .
+<http://stackoverflow.com/schema#score> <http://www.w3.org/2000/01/rdf-schema#range> <http://www.w3.org/2001/XMLSchema#integer> .
+<http://stackoverflow.com/schema#hasComment> <http://www.w3.org/2000/01/rdf-schema#comment> "Links a post (question or answer) to a comment associated with it." .
+<http://stackoverflow.com/schema#answerCount> <http://www.w3.org/2000/01/rdf-schema#range> <http://www.w3.org/2001/XMLSchema#integer> .
+<http://stackoverflow.com/schema#possibleBetterAnswer> <http://www.w3.org/2000/01/rdf-schema#range> <http://stackoverflow.com/schema#Answer> .
+<http://stackoverflow.com/schema#TagWiki> <http://www.w3.org/2000/01/rdf-schema#label> "Tag Wiki" .
+<http://stackoverflow.com/schema#acceptedAnswerOf> <http://www.w3.org/2000/01/rdf-schema#domain> <http://stackoverflow.com/schema#Answer> .
+<http://stackoverflow.com/schema#linkedTo> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2002/07/owl#SymmetricProperty> .
+<http://stackoverflow.com/schema#hasAnswer> <http://www.w3.org/2000/01/rdf-schema#label> "has answer" .
+<http://stackoverflow.com/schema#acceptedAnswer> <http://www.w3.org/2000/01/rdf-schema#comment> "Links a question to its accepted answer." .
+<http://stackoverflow.com/schema#commentOn> <http://www.w3.org/2000/01/rdf-schema#label> "comment on" .

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