?x t:intervalStarts ?y 

Matches interval ?x and interval ?y such that ?x starts ?y.

?x and ?y can be defined as intervals using either times or points (though they must both be defined using the same mechanism).

I.e., Either ?x and ?y have the same start times and the end time of ?x is before the end time of ?y or Either ?x and ?y have the same startpoints and the endpoint of ?x is before the endpoint of ?y.


The following namespace abbreviations are used:

The SPARQL magic properties reference has additional information on using AllegroGraph magic properties and functions.