System fields are a category of fields that cannot be updated by users. They are automatically set or updated by TRACE system:

●      Created On: The date when the form was created.

●      Created By: The name of the user that created the form.

●      Updated On: The date when the form was updated last time.

●      Updated By: The name of the user that updated the form last time.

●      Form Type: The name of the form-type that was instantiated when the form was created.

●      Link: The user-friendly link to be used to access the form, on Project name and Form ID. In some cases, the user can change the Form ID so this link is subject to change.

●      Permanent Link: The link to be used to access the form. Unlike the Link, the Permanent Link never changes

●      Version: The version number of the form represents the number of times the form fields were updated. One updated of the form counts as +1, even multiple fields were changed.

●      Ancestors/Parent: In a tree-structure, forms can have ancestors/parents unless they are root forms

●      Child: In a tree-structure, forms can have child forms. Any form that is not on root level is some other form child.

●      UID: Unique identifier of a form.

https://trace3.windriver.com/app/?project_id=552&form_id=798274

The form_id value in the above form link is the UID, in this case 798274. This field is very important and useful in export/import of tree structures.