European Data Portal Version 4.3 – User Manual   Page 54 of 57 
 
 
3.7 SPARQL Manager 
The SPARQL M anager provides a grap hical user interface ( GUI) for sending user defined q ueries to 
the Virtuoso SPARQL query engine. 
The powerful SPARQL Protocol a nd RDF Query Langua ge are primarily aimed at professionals for 
querying metadata as Linked Data. A basic knowl edge of the DCAT -AP specification is highly 
recommended. 
In the future , users of the SPARQL Manager will be able to save their queries for scheduled 
execution. Additionally a notification will be send to the user when a result has changed. 
Clicking the inf o icon in the upper  right corner will display a step -by-step walkthrough  of all 
components with a short info about their function. 
This is possible in both of modes of the SPARQL Manager, the search and the assistant mode, which 
will be described in the following sections.  
3.7.1 SPARQL Search 
 
 
In this mode you can load some predefined example queries from the right side into the editable text 
area to introduce yourself w ith the very basic SPARQL syntax. Limiting the number of returned 
results is possible by se lecting a value fro m the Limit -dropdown or by editing the query directly . 
Furthermore the format for the result can be selected. After clicking the Search -Button the result is 
displayed in Result data preview area below. The preview may be truncated depending on the size of 
the result. The complete result could always be downloaded as a file by clicking the Download-link on 
the right side.