Table 10.
The description of ecgML: subelements for elements Pwave, QRSwave, Twave, Uwave and OtherWave
| Element/attribute | Description/Origin | Required | Values/Data Type | Example |
| Onset | Beginning value of the wave in time or samples | Required | Time/samples | 00:00:12.000 |
| Peak | Peak value of the wave in time or samples | Required | Time/samples | 00:00:12.600 |
| Offset | Ending value of the wave in time or samples | Required | Time/samples | 00:00:13.002 |
| Annotation | Annotation of the wave | Optional | string | Normal |
| Comment | Any comments on the annotation | Optional | string |