This element defines the defined names that are defined within this workbook. Defined names are descriptive text that is used to represents a cell, range of cells, formula, or constant value. Use easy-to-understand names, such as Products, to refer to hard to understand ranges, such as Sales!C20:C30. A defined name in a formula can make it easier to understand the purpose of the formula. Names are available to any sheet. Names can also be used to represent formulas or values that do not change (constants).
You can also link to a defined name in another workbook, or define a name that refers to cells in another workbook.
A compliant producer or consumer considers a defined name in the range A1-XFD1048576 to be an error. All other names outside this range can be defined as names and overrides a cell reference if an ambiguity exists.
creates a new DefinedName.
Returns the value of attribute local_sheet_id