Consuming SPARQL endpoints

Overview

The Knowledge Graph can be queried using SPARQL (opens new window), the standard query language for RDF data.

SPARQL 1.1 Support

Ontopic Suite provides comprehensive support for SPARQL 1.1 features, including:

• Basic graph patterns and filters
• Optional patterns and unions
• Aggregation functions (COUNT, SUM, AVG, etc.)
• Subqueries
• Built-in functions and operators

Limitations: The main unsupported features are recursive property paths and the SERVICE clause. For complete details about SPARQL 1.1 compliance, refer to the Ontop documentation (opens new window).

Note: Ontopic Suite only supports read-only SPARQL operations.

Querying

From the User Interface

Execute SPARQL queries directly through the user interface:

1. Navigate to Query > SPARQL
2. Enter your SPARQL query in the editor
3. Select the endpoint to query on the top-right
4. Click on the run to execute the query
5. Optionally, click View source SQL to inspect the generated SQL query that runs against your data sources

From the Web API

Ontopic Suite implements the SPARQL 1.1 Protocol (opens new window) specification, exposing SPARQL endpoints via standard HTTP methods. For more details, see the Web API reference.