SPIP - Configuration

The optional picture is searched in the picture directory you determined in the configuration file config.spip.
Sometimes, if you use special HTML tags inside your data tag, you have to add the line
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
as the second line of your sheet file.
You can take a look at the sheet files of this sample presentation. You find them in the subdirectory documentation/sheets/ in the SPIP directory. If you don't know where that is perhaps which spip.pl may help. If the result is a link, you have to follow that link to find the SPIP directory.

Introduction into SPIP - Simple Presentations In Perl Remarks on creating a sheet