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.

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.

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.