Recent work on the Mariage project has shown the most effective way to approach user-switching between styles on the site: we should use Cocoon's built-in cookie selector to set the path to XSLT and CSS files used. The exact details of this need to be worked out, though; given the limitations we have in doing includes in XSLT files (see previous postings), we won't have complete freedom to mix and match components; we may have to depend on relative paths to do that for us, so XSLT stylesheets may have to be organized into subcollections.