I don't really understand your question but if you're trying to ask if the book provides a subject on namespaces, it does. In fact it provides a whole CHAPTER about namespaces. It is chapter 9, "Memory Models and Namespaces". And trust me, once you start that book, learning from another source (For example a website) is NOT good. Finishing it is much more beneficial to you because some sources exlpain the information in a different order.
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