This can either be the workbook which the named reference belongs to or one of the worksheets in the workbook.
The scope determines how formulas need to preface a name in order to use the named reference.
If the scope is the workbook, formulas in any cell in the workbook can reference the named reference by specifying just the name or the workbook's file name, an exclamation point, and the name:
If the scope is a worksheet, formulas in cells of the worksheet can reference the named reference by specifying just the name. In addition, they can fully qualify the named reference with the worksheet name and, optionally, the workbook file name:
Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+