als below indicate the broad base of support
  for the specification. All of the required features had at least
  two implementations.
  All of the optional features also received at least one implementation.
  However, these optional features do not have
  conformance requirements that have an impact on interoperability.
</p>

<h2 id="h_report_reqs"><a id="report_reqs" name="report_reqs">5. Implementation Report requirements</a></h2>

<h4 id="h_DetailedReqs"><a id="DetailedReqs" name="DetailedReqs">5.1 Det