The non-contextual content of a WITSML Message object. A reference to an object that is defined within the context of a wellbore. A reference to an sub-object that is defined within the context of the object referenced by objectReference. This should only refer to recurring components of a growing object. Date and time the information is related to. A code used to define rig activity. Custom string to further define an activity. Along hole measured depth of measurement from the drill datum. Along hole measured depth of measurement from the drill datum. Message type. Message text. Any extra numeric data. Severity of incident. A warning probability (applies to warning).