It turns out that is you change in the Spreadsheet::XLSX module:

my $cell =Spreadsheet::ParseExcel::Cell->new(
Val    => $v,
Format => $thisstyle,
Type => $type
);
[download]

to

my $cell =Spreadsheet::ParseExcel::Cell->new(
Val    => $v,
Format => $thisstyle,
Type => ""
);
[download]

It removes the formatting. There are still minor differences with what appears in the ss2tk display. The format that results from the change mentioned above seems to use the same sort of rounding that Excel itself does before displaying the raw data from worksheet#.xml files.

For instance a piece of raw data displayed in the ss2tk table and in the XML worksheet file is 1.3318000000000001 and changing the Spreadsheet::XLSX routine and using the Utility2007::xls2csv function and Excel itself displays a rounding to 1.3318.

Thanks again for the help.