Read Only DFF Segment in Oracle Forms

• Create a new value set with the details as shown in the screenshot. 
• Make sure the 'Validation Type' is 'Special'
• Hit 'Edit Information'

 

• Make sure to enter the following:

Event: Edit
Function: FND SQL "BEGIN NULL; END;"

Event: Validate
Function: FND SQL "BEGIN NULL; END;"

• Assign the above value set to the DFF when you create the Descriptive Flexfield Segment.