Starts

The STARTS operator states that one interval starts at the same time as another, and ends within the latter:

The EveXL notation for interval I1 starting interval I2 is: -[ I1 ] I2 ]->. For instance, the following expression will match an interval of "green" readings, overlapping an interval of "green" or "blue" readings.

Contains

The CONTAINS operator states that one interval starts and ends within another:

The EveXL notation for interval I1 containing interval I2 is: -[ I1 [ I2 ] I1 ]->. For instance, the following expression will match an interval of "red" and "blue" readings, containing an interval of "blue" readings.

Finishes

The FINISHES operator states that one interval starts inside another and ends when the other ends:

The EveXL notation for interval I2 finishing interval I1 is: -[ I1 [ I2 ]->. For instance, the following expression will match an interval of "red" readings finishing a mixed interval of "red" and "blue" readings.