A UDF (User Defined Field) is a feature of OpenDocMan that allows the administrator to add custom meta-data fields to all documents.
To Add UDF's:
Now that the UDF is added, the Select List UDF needs some values for the users to pick from:
Now “edit” or “add” a file and you should see a new dropdown list with Blue/Red as options for each file.
Radio items are done the same way as Select lists. The Text Field UDF just provides a blank text box for each file.