From OpenSCADAWiki
Requests flags (enum — ReqFlg):
- TFld::ForceUse(0x01) — Forcing the setting of the flag of the element's using during the setting of its value.
- TFld::ExtValOne (0x02) — One/first (and default) value: set value for key.
- TFld::ExtValTwo (0x04) — Two/second value: base value for the key request or set.
- TFld::ExtValThree (0x08) — Three value: source address for translations.