[ZDP] BackTalk to Document The Zope Book (2.5 Edition)/Extending Zope

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A comment to the paragraph below was recently added via http://www.zope.org/Documentation/Books/ZopeBook/current/CustomZopeObjects.stx#2-44

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    Before going on with the next example, you should rename the
    existing *ZooExhibit* Product in your Zope Products folder to
    something else, like *ZooTemplate* so that it does not conflict
    with this example. Now, create a new Product in the Product folder
    called *ZooExhibit*.

      % Anonymous User - Sep. 19, 2002 11:05 am:
       I belive you omitted: "Go into the ZooExhibit Product you just created..." Otherwise, the Add ZClass
       selection in the next step does not appear.

      % Anonymous User - Sep. 19, 2002 11:08 am:
       Please explain why a containing Product is necessary to create a ZClass.

      % Anonymous User - Nov. 12, 2002 11:21 am:
       I think ZClasses are tools for Products. In fact before they say that ZClass, Zope Factory and another class
       appear in the selection box only when you are adding objects in the product creation