title: how to indicate that a namespace is only for library use?
body: <p>I'm working in a project where I happened to define a global <code>std::map</code> variable which will store run-time fabricated values. I want to specify that such variable and the two functions (one that updates and other which searches) for that map are only for library use. What I'm doing until now is to declare the <code>namespace</code> as <code>namespace stored__</code> so that it groups the features which will accomplish the same function. I don't know if there is a standard for such purpose, I'm using <code>__</code> at the end to imply that it mustn't be used in to a derived project just the library.</p>
  <p>How should I indicate that a namespace is only for library use?</p>
  <p>I greatly appreciate your help.</p>