Hello, Does a template exist for implementing an MVC (VisualWorks Smalltalk) like structure for Products. The Product example I have shows inheriting Zope class info and DTML info into the "domain object". I'd like a pattern where the Python objects remain clean, are wrapped by a value model, and linked via the value model with a presentation scheme (DTML). Some code is presented below to the idea across but is not a suggested implementation. class DomainWrapper( OFS.SimpleItem.Item, Persistent, Acquisition.Implicit, AccessControl.Role.RoleManager, ): # Specify definitions for tabs: manage_options=( {'label':'Properties', 'action':'manage_main'}, {'label':'View', 'action':''}, {'label':'Security', 'action':'manage_access'}, ) # Specify how individual operations add up to "permissions": __ac_permissions__=( ('View management screens', ('manage_tabs','manage_main')), ('Change permissions', ('manage_access',) ), ('Change Persons', ('manage_edit',)), ('View', ('','manage_self_edit') ), ) _domainObj = '' index_html = HTMLFile('blank',globals()) def for(self,aDomainObject) _domainObj = aDomainObject def defaultHTML(self, aDTMLFile) index_html = HTMLFile(aDTMLFile) #end class DomainWrapper class DomainObj: #end class DomainObj class Person(DomainObj): _lname = '' _fname = '' _ssn = '' def _init_(self, lastname, firstname,ssn ): _lname = lastname _fname = firstname _ssn = ssn #end class Person p = Person(John,Smith,1112223333) pdw = DomainWrapper.for(p) pdw.defaultHTML('person.dtml') regards, Steve