Precedes

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.

Meets

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.

Overlaps

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.