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 <tickit> { ?s <eventname> "Wicked" . }

true