| Name | Type | Use | Default | Fixed | Annotation |
| value | xsd:double | required | | | |
| timeStamp | nonNegativeScalarType | optional | | | | documentation | | Time value in seconds. |
|
| title | xsd:string | optional | | | | documentation | | Short title naming this element. |
|
| description | xsd:string | optional | | | | documentation | | Descriptive text explaining the intended effect of this element. |
|
| id | xsd:ID | optional | | | | documentation | | Unique identifier for this element. |
|
| refid | xsd:IDREF | optional | | | |