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2.6 KiB
2.6 KiB
title, description, icon
| title | description | icon |
|---|---|---|
| Triplet Store Module | RDF triple storage with SPARQL queries and bulk loading — Blazegraph, Apache Jena, and RDF4J. | table |
Store and query RDF triplets with SPARQL support.
Overview
The Triplet Store Module provides W3C-standard RDF storage with full SPARQL query support. Use it when you need semantic web compatibility, OWL reasoning, or SPARQL-based queries.
Backends: Blazegraph, Apache Jena (Fuseki), RDF4J.
Basic Usage
from semantica.triplet_store import TripletStore
store = TripletStore(
backend="blazegraph",
endpoint="http://localhost:9999/blazegraph/sparql"
)
# Add triplets
store.add_triplet(
subject="http://example.org/apple_inc",
predicate="http://example.org/founded_by",
obj="http://example.org/steve_jobs"
)
# Bulk load
store.add_triplets_bulk(triplets)
SPARQL Queries
# SELECT query
results = store.sparql("""
PREFIX ex: <http://example.org/>
SELECT ?person ?company WHERE {
?person ex:founded ?company .
?company ex:located_in ex:SiliconValley .
}
""")
# CONSTRUCT query (returns graph)
graph = store.sparql_construct("""
PREFIX ex: <http://example.org/>
CONSTRUCT {
?s ex:connected_to ?o
} WHERE {
?s ex:founded ?company .
?company ex:has_investor ?o .
}
""")
Backends
# Blazegraph
store = TripletStore(
backend="blazegraph",
endpoint="http://localhost:9999/blazegraph/sparql",
namespace="semantica"
)
# Apache Jena Fuseki
store = TripletStore(
backend="jena",
endpoint="http://localhost:3030/dataset/sparql",
update_endpoint="http://localhost:3030/dataset/update"
)
# RDF4J
store = TripletStore(
backend="rdf4j",
server_url="http://localhost:8080/rdf4j-server",
repository_id="semantica"
)
Import / Export
# Import from file
store.import_file("ontology.ttl", format="turtle")
store.import_file("data.jsonld", format="json-ld")
# Export to file
store.export("output.ttl", format="turtle")
store.export("output.nt", format="nt")