Is there a common lisp library for creating excel spreadsheets? I'd much much prefer that it output one of the XML formats.
Update:
To add some more context, creating a csv file from common lisp is pretty trivial, and that's what I'm doing now.
The XML Spreadsheet format is pretty simple, and there are common lisp libraries that make it easy to output arbitrary XML, so rolling my own would be pretty easy, but if something already exists to ease the process I would prefer that.