[ZDP] BackTalk to Document Zope Developer's Guide (2.4 edition)/Zope Products

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A comment to the paragraph below was recently added via http://zope.org/Documentation/Books/ZDG/current/Products.stx#4-30

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        'Item' requires that your class and instances have some
        management interface related attributes.

          'meta_type' -- This attribute should be a short string which
          is the name of your product class as it appears in the product
          add list. For example the poll product class could have a
          'meta_type' of 'Poll'. 

          'id' or '__name__' -- All 'Item' instances must have an 'id'
          string attribute which uniquely identifies the instance within
          it's container. As an alternative you may use '__name__'
          instead of 'id'. 

          'title' -- All 'Item' instances must have a 'title' string
          attribute. A title may be an empty string if your instance
          does not have a title.

          % Anonymous User - Nov. 23, 2003 9:23 pm:
           If you use __name__ instead of id, you need to mix in the Item_w__name__ class from OFS.SimpleItem