e outcome with the original resource - ideally, it should be identical</li>
  </ol>
 </li>
 <li>
   All transforms should execute - that is, they should be able to take any R3 resource, represent the content in R4, and then generate an R3 representation for the same content.
   Note, though, that in a few cases, the differences between R3 and R4 designs are so significant that not all examples can be successfully transformed at all.
 </li>
 <li>
   For some resources, the differences in design betwe