The following three fields together uniquely identify an ItemOptionValue object.
The item to which this option belongs.
The ID of the option. This must be unique for a given ItemId.
The ID of the value corresponding to the above OptionNumber. This must be unique for a given OptionNumber and ItemId.
A collection of value strings for the value localized in various languages. They key is the language and the value is the localized string.
A collection of description strings. The key is the language code and the value is the description localized in that language.
The price of the value given by that option.
A string representing what tax to apply to the Price.