2.2.7.4.1.1 External Defined Name
An external defined name is a reference to a defined name in an external workbook (section 2.1.10). The records specifying the external defined name will provide the name, scope, and formula (section 2.2.2) of the defined name on that workbook. The restrictions on the types of formulas supported in external defined names are described in section 2.4.805.