CHAPTER 9Writing an Add-On Product
In the preceding chapters, you have seen what Plone is, what you can do with it, and how to modify its default behavior without writing a single line of code on the file system (e.g., adding content types, manipulating workflow schemas, modifying default page templates, etc.).
So, where do developers come in? They come in whenever you need to change Plone's underlying structure, and a simple reconfiguration of its services isn't enough.
Everything you have to do to configure a Plone instance can be easily distributed among many Zope services using a so-called product, which is a Zope synonym for an extension or plug-in. Besides that, working together on the same instance of a Plone site can be a nightmare ...
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