The PRECEDES operator states that **one interval ends before another starts**:

In EveXL, we state that interval I1 precedes I2 with the following syntax -[ I1 ]-[ I2 ]->.
For instance, the following expression will match an interval of "blue" readings preceding an interval of "red" readings.

The MEETS operator states that **one interval ends when another interval starts**:

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

The OVERLAPS operator states that **one interval ends within another interval**:

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