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SPARQL 1.1 query service wrapping pub/sub triples interface

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Add a backend-agnostic SPARQL query service that parses SPARQL
queries using rdflib, decomposes them into triple pattern lookups
via the existing TriplesClient pub/sub interface, and performs
in-memory joins, filters, and projections.

Includes:
- SPARQL parser, algebra evaluator, expression evaluator, solution
  sequence operations (BGP, JOIN, OPTIONAL, UNION, FILTER, BIND,
  VALUES, GROUP BY, ORDER BY, LIMIT/OFFSET, DISTINCT, aggregates)
- FlowProcessor service with TriplesClientSpec
- Gateway dispatcher, request/response translators, API spec
- Python SDK method (FlowInstance.sparql_query)
- CLI command (tg-invoke-sparql-query)
- Tech spec (docs/tech-specs/sparql-query.md)
This commit is contained in:
Cyber MacGeddon 2026-04-02 16:01:54 +01:00
parent 62c30a3a50
commit 9ce1ac0f1c
20 changed files with 2524 additions and 3 deletions
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trustgraph-cli/pyproject.toml
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@ -51,6 +51,7 @@ tg-invoke-document-embeddings = "trustgraph.cli.invoke_document_embeddings:main"
tg-invoke-mcp-tool = "trustgraph.cli.invoke_mcp_tool:main"
tg-invoke-nlp-query = "trustgraph.cli.invoke_nlp_query:main"
tg-invoke-rows-query = "trustgraph.cli.invoke_rows_query:main"
tg-invoke-sparql-query = "trustgraph.cli.invoke_sparql_query:main"
tg-invoke-row-embeddings = "trustgraph.cli.invoke_row_embeddings:main"
tg-invoke-prompt = "trustgraph.cli.invoke_prompt:main"
tg-invoke-structured-query = "trustgraph.cli.invoke_structured_query:main"