The following python method returns a list of all the empty properties in the ZClass it's a method of. Add it as a KeywordIndex to your ZCatalog, and you can search for empty properties easily. For example, if you want to find all object where 'title' is empty, use: <dtml-in "catalog({'emptyProperties' : 'title'})"> ... </dtml-in> ================================================================ # ** function name: emptyProperties # ** parameters: self ## Return list of all empty properties in our propertysheets ## emptyproperties = [] #empty properties propertysheets = self.propertysheets.items() i = 0 for sheetname in propertysheets: sheetname = sheetname[0] if sheetname == 'webdav': i = i + 1 continue psheet = self.propertysheets[i] validprops = [] for pmap in psheet.propertyMap(): if pmap['type'] in ['string', 'text']: validprops.append(pmap['id']) for pname, pcontent in psheet.propertyItems(): if (pname in validprops) and (not pcontent): emptyproperties.append(pname) i = i +1 return emptyproperties