Building a query

Once connected, the query page shows three areas, top to bottom: the visual query builder, the SPARQL editor and the results.

The builder is Sparnatural. Its choices come from the deployment itself: Agrafe describes the deployed schema, its concepts and the properties between them, and Eqlat hands that description to the builder. What you can pick is exactly what the project declares.

Writing a query by clicking

Start from a concept: the builder lists the concepts of the deployment. Then pick a relation leaving it, and the concept at the other end. Keep chaining to follow the graph further. Labels are shown in English.

Every change rewrites the query in the SPARQL editor below, so you can see what the builder means. Queries are generated with a limit of 100 results.

Running it

Press the builder’s play button. It is disabled while the query runs and comes back when the answer arrives, in the results table. The query only sees the data of this deployment.

The play button runs what is in the SPARQL editor, so a query you edited by hand runs as edited.

Starting over

The builder’s reset button empties the query, the SPARQL editor and the results.

Not covered here

Eqlat does not change how the builder itself behaves. For its finer points, filters and options, see the Sparnatural documentation.