title: when to use explicit relations - schema design
body: <p>I am pondering about schema design with regard to explicit vs implicit relation when to...</p>
  
  <p>for example:
  in an imaginary schema with 2 custom types author and post, each with several properties, A post type can reference an author in 1 of 2 ways:</p>
  
  <ol>
  <li>explicit: having an Autor type property</li>
  <li>implicit: having a scalar value that indirectly points to the author</li>
  </ol>
  
  <p>when designing a shema. what should be my compass in this kind of desicion making?
  thanks in advance</p>