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SPARQL queries

Metadata can be directly accessed through SPARQL queries.

The SPARQL query below will retrieve a list of all availbale filters of each telescope. It can be executed in the Stellaris query form below.

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rtml: <http://www.rtml.org/v3.2#>
SELECT ?FilterType ?tel
?tel rtml:RTML ?n1 .
?n1 rtml:Telescope ?n2 .
?n2 rtml:Camera ?cam .
?cam rtml:FilterWheel ?fw .
?fw rtml:Filter ?Filter .
?Filter rtml:type ?FilterType .
?Filter rtml:name ?FilterName .

The Stellaris query form provides a direct interface to the stored metadata.