The 1997 ISDA Government Bond Option Definitions are intended for use in confirmations of individual transactions governed by agreements such as the 1992 ISDA Master Agreements. These Definitions are primarily an expansion and revision of the 1993 Confirmation of an OTC Bond Option Transaction (Long Form). They provide the basic framework for the documentation of an over-the-counter government bond option transaction. These Definitions expressly contemplate options in certain European government bonds, which are capable of cash settlement or physical settlement. Parties may find these Definitions a useful starting point when drafting a confirmation for an option transaction relating to non-European government bonds or corporate bonds.