2.2.7 External References


The external references infrastructure exists to support formulas (section 2.2.2) which reference data sources outside the scope of the sheet (1) on which the formula (section 2.2.2) resides. These sources could be other sheets (1) in the same workbook, data in another workbook, DDE links or Object Linking and Embedding (OLE) links. A workbook that uses external references contains a collection of XTI records (section 2.5.344) that in turn reference SupBook records (section 2.4.271) that specify the source of the data.