Only reference I can find to this topic is http://zope.nipltd.com/public/lists/dev-archive.nsf/0a8715d5f3c7b6a3802568c1 006328f7/28e1ed0f8d7efdc980256879003d36d8 , which seems to have gone unanswered. So, since it took me so long to figure out (mostly because I kept trying to put things into the class, not the instance, and 'cause I didn't realise that the newer property sheet mechanisms don't want to "pollute" the namespaces of the instance), figured I'd post an example of using the PropertySheet/PropertySheets constructs. Notes: I'm just guessing with a lot of this stuff, hopefully if there's problems someone can point them out. Use at your own risk, and take with a grain of salt :) . I never could get the DefaultProperties mechanism to work (it's what I was really wanting to use, doing the work with the PropertySheets stuff means a lot of code re-writing). Is there a better/standard mechanism for getting properties than the getProperty function in the example? Seems this kind of access should be included with the basic property system. I couldn't use PropertyManager because of limitations on datatypes it will support. Haven't been able to get write-only properties to work. They either complain that I'm trying to overwrite them when i use the property management interfaces, or they turn to "" strings. Neither old nor new property addition interfaces allow for adding datetime or list property types. Enjoy, Mike 8<_____________ event2.py ___________ __doc__ = """Event Product Module""" __version__ = '0.1' from Globals import HTMLFile from Globals import MessageDialog from Globals import Persistent import OFS.SimpleItem from OFS.PropertySheets import PropertySheets, PropertySheet import Acquisition # Various acquisition types. import AccessControl.Role # Zope Security management. import DateTime manage_addEvent2Form = HTMLFile('event2Add', globals()) def manage_addEvent2(self, id, REQUEST=None): '''Add an event object ''' newEvent = Event( REQUEST ) newEvent.id = id self._setObject( id, newEvent ) if REQUEST is not None: return self.manage_main(self, REQUEST) class Event( OFS.SimpleItem.Item, # A simple Principia object. Not Folderish. Persistent, # Make us persistent. Yaah! Acquisition.Implicit, # Let us use our parent's variables and methods. AccessControl.Role.RoleManager # Security manager. ): meta_type='VRPilot Event' index_html =HTMLFile( 'event2Index', globals() ) event2_display_rows = HTMLFile( 'event2_display_rows', globals() ) manage_main = HTMLFile( 'event2Edit', globals() ) manage_propertiesForm = manage_main # gets around assumption in propertysheet code manage_options = ( {'label':'Edit', 'action':'manage_main'}, {'label':'View', 'action':'index_html'}, # should do something more intelligent than hard-coding in a real app {'label':'Properties', 'action':'properties/default/manage'}, {'label':'Security', 'action':'manage_access'}, ) __ac_permissions__ = ( ('View', ('index_html', '')), ('View management screens', ('manage', 'manage_main', 'getProperty')), ('Manage properties', ('properties',)), ) # these aren't used here, they are copied into the default property sheet _properties = ( {'id':'title', 'type': 'string', 'mode':'w', "meta": {}}, {'id':'description', 'type': 'text', 'mode':'w', "meta": {}}, {'id':'location', 'type': 'string', 'mode':'w', "meta": {}}, {'id':'startdate', 'type': 'datetime', 'mode':'w', "meta": {}}, {'id':'enddate', 'type': 'datetime', 'mode':'w', "meta": {}}, ## {'id':'creationdate', 'type': 'datetime', 'mode':'w', "meta": {}}, ## {'id':'creator', 'type': 'string', 'mode':'w', "meta": {}}, ) def __init__( self, REQUEST= None ): # simple attirbutes self.creationdate = DateTime.DateTime() self.creator = REQUEST.AUTHENTICATED_USER.getUserName() ### Build property sheets... self.properties = PropertySheets() props = PropertySheet( 'default' ) props._properties = self._properties props._extensible= 0 # don't allow definition of new properties # the default values for the properties props.title = "" props.description = "" props.location = "" props.startdate = DateTime.DateTime() props.enddate = DateTime.DateTime() # add the default sheet to the set of sheets self.properties.__of__( self ).addPropertySheet( props ) # now configure the property sheet... self.properties.get('default').manage_editProperties( REQUEST ) def getProperty( self, name, default=None ): ''' Retrieve value of a property by name, from whatever property sheet it is stored in If the property isn't valid for any sheet, return default ''' for sheet in self.properties: if sheet.hasProperty( name ): return sheet.getProperty( name, default ) return default __________________________________ Mike C. Fletcher Designer, VR Plumber http://members.home.com/mcfletch