ASK

Use the ASK query form to determine whether a particular triple pattern exists in the specified data set. ASK returns true or false, depending on whether the solution or match exists.

Syntax

[ PREFIX Clause ] ASK [ FROM Clause ] { triple_template }

Examples

The following example ASK statement queries the sample Tickit data set to ask whether data exists for the event named Wicked:

ASK FROM http://anzograph.com/tickit { ?s http://anzograph.com/tickit/eventname "Wicked" . }

true