change (Variable Changed)

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This is a "system-level" counterpart of updated event. The "change" event is fired when value of the some variable defined in this context is modified. In contrast to the "updated" event that is designed to deliver property changes to other system modules, the "change" event is used to persistently store historical property values. The history of this event is internally used by different system components to retrieve property history.

Event Name

change

Permissions:

Accessible at Observer permission level

Records:

1

Record Format:

Field Name

Field Type

Notes

variable

String

Name of changed variable.

value

Data Table

New value of the variable.

data

String

Value of the variable encoded into string, without format. This field is filled only when "value" field is NULL.