@nexedi I'm wondering if Web{Section,Site}Traversal should have its own Document (currently in Web{Section,Site} Documents) and a Portal Type created for it as they are Persistent objects exported to XML.

Also, about WebSection being in erp5_base rather than erp5_web: it's because we have Python Script starting with WebSection_ (such as WebSection_getCKEditorPrecacheManifestList in erp5_xhtml) and CodingStyleTestCase complains about it because erp5_web is not installed and thus WebSection Document is not available. I don't think these scripts could be moved elsewhere nor an exception should be added to CodingStyleTestCase, so I have put WebSection in erp5_base. @romain What do you think?