My main doubt using the Zope, is as to implement the OO concepts using the Zclasses. In the Z Classes, the attributes will be created in the " Property Sheets "? The operations will be created in the border " Methods "? The aggregation concept will be used using " Subobjects "? Question 2 is my main doubt. I am thankful all -- ----------------------------------------- Douglas Daniel Del Frari ----------------------------------------- Brazil, RS ----------------------------------------- mailto:[EMAIL PROTECTED] http://labinf.detec.unijui.tche.br/~gaucho ----------------------------------------- _______________________________________________ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )