There seems to be an issue with the Table Editor in DIS not recognising the delta option for columns in a table.
For example the following test connector shows the delta option being used to populate the difference in the number of In and Out octet counts between polls of the interface table. While the options=";delta=3" entry in a ColumnOption will not trigger an error in Validate, using the Table Editor window in DIS, it is highlighted as an Unknown option as shown in the screenshot below:
Hi Paul,
Thanks for reporting. The table editor indeed seems to not be aware of this option and therefore marks it as unknown. I've created a task to update this logic so the table editor will be aware of all options. This task has been added to our backlog.