https://docs.microsoft.com/en-us/dotnet/api/documentformat.openxml.spreadsheet.cellformula?view=openxml-2.8.1 https://docs.microsoft.com/en-us/dotnet/api/docume

https://docs.microsoft.com/en-us/dotnet/api/documentformat.openxml.spreadsheet.cellformula?view=openxml-2.8.1 https://docs.microsoft.com/en-us/dotnet/api/documentformat.o... The OpenXML basis format for XSLX is an ISO standard. Most things are documented albeit in a somewhat obtuse way.