2.5.5.1 CellRef

The CellRef token specifies a reference to a cell in a reference context.

ABNF:

 cellRef = [sheetref "!"] ( name / NamedCellRef / IndexedCellRef / SingleLetterNamedCellRef )
  
 sheetref = CrossPageRef / DocSheetRef / MasterSheetRef / PageSheetRef / ShapeSheetRef / StyleSheetRef

name is a name of a cell in the web drawing. It MUST be equal to the N attribute of a Cell_Type element that is a child element of the Sheet_Type element in the current reference context or a reference context specified by sheetref.