optional; value-type: string; Indicates the fields in the copy elevation dialog which should be read only. The fields are provided in a comma separated, case insensitive, string of Field constants. 

For the copy elevation dialog to have:

• name field read only, IsReadOnly should include Field.Name constant.
• amount field read only, IsReadOnly should include Field.Amount constant.
• alternative field read only, IsReadOnly should include Field.Alternative constant.
• user description field read only, IsReadOnly should include Field.UserDescription constant.

Value examples:

• "NAME": name field only will be read only.
• "name,Amount,ALTERNATIVE,User_Description": name, amount, alternative and user description fields will be read only.