Sometimes is a great way use read-only to to restrict change or to make sure input is valid. However, all read-only fields are not submitted by default onSave event.
This is not desirable if you are automatically populating fields from user input on another field(s) and those fields cannot be changed by user. Those auto-populated fields will never be saved.
Submit values available are:
- alwaysit will submit only if the value of the attribute has changed
- dirtyit will not submit at all