title: UUID namespace and name. How to retrieve it?
body: <p>I have the following problem. I assign to any object in my database a UUID. When I get a UUID from any source, to obtain the object I need to know what type of object is, so I can query the correct table in the database. As far as I understand, UUID version 5 supports namespacing, but I am not sure I clearly understand its meaning. </p>
  
  <p>Is it possible to associate to a UUID information about the namespace it belongs, so to recover it later ?</p>