QLever FAQs

Question 1

Is input sanitization handled automatically?

Accepted Answer

Absolutely. All user-controlled inputs, including string literals and IRIs, are automatically sanitized and validated against RFC 3987. This prevents SPARQL injection attacks and ensures data integrity before any query execution or update.

Question 2

How does QLever ensure data security during updates?

Accepted Answer

For SPARQL Update operations, it includes dry-run previews, detects destructive commands (like DROP/CLEAR ALL), requires an access token, and performs strict IRI validation and SPARQL injection prevention to safeguard your data.

Question 3

What is QLever (mcp-server-qlever)?

Accepted Answer

QLever (mcp-server-qlever) acts as a bridge, connecting Model Context Protocol (MCP) compatible clients, such as Claude Code, to underlying QLever SPARQL engines for efficient knowledge graph interaction and management.

Question 4

What unique features does this QLever connector offer?

Accepted Answer

It provides context-sensitive SPARQL autocompletion, native geographic search (radius/bounding box), full-text search via SPARQL+Text extension, query plan analysis, and robust SPARQL 1.1 Update with safety features.

Question 5

Can I connect to different QLever instances?

Accepted Answer

Yes, it is designed to work seamlessly with any QLever instance – whether it's local (e.g., via Docker), self-hosted on a server, or a public endpoint, offering flexible integration options for various knowledge graphs.

QLever

QLever

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