I depends on the complexity of your XML file. If the XML is not too complex (table like) I suggest you first take a look at Spreadsheet::WriteExcel::FromXML and related modules. This seems to do exactly what you want. If on the other hand your XML file is complex you probably have to write it yourself. You can combine an XML parser and an Excel writer for that. There are several modules available on CPAN.

You should take a look at two modules, Spreadsheet::WriteExcel and XML::Parser.

Good luck,
Luke

It depends what kind of Excel file you need to deliver. Usually I generate tab separated files, and everybody is happy, the users because they can import them seamlessly into Excel, and me because I can read them with a text editor. You can use pretty much any XML module to deliver that format.