`<audio>` does not work

The plugin doesn't seem to support the <audio> LwDITA element. I created an MDITA topic that contains the following HDITA snippet, based on the example for the draft spec:

<audio title="Alarm audio" controls>
  <source src="../Alarm10.wav">
  <p data-class="fallback">This music is not available.</p>
</audio>

When I use the default html5 transtype, that markup becomes:

<object><param name="source">

  <p class="p">This music is not available.</p>
</object>

Which doesn't match the syntax example for this element on MDN.

This is the normalized DITA output (dita transtype):

<audio title="Alarm audio" controls="">
  <source name="source" src="../Alarm10.wav"/>
  <p data-class="fallback">This music is not available.</p>
</audio>

The October 2018 Committee Note says that the LwDITA multimedia elements would be added to a new domain in DITA 1.3, but there haven't been any changes to DITA 1.3 since June of 2018. But I do see that the latest draft of DITA 2.0 includes the <audio> and <video> multimedia domain elements. The draft LwDITA spec doesn't currently say what version of full DITA it's supposed to be a subset of. I think this all means that the LwDITA subcommittee changed its mind and LwDITA is no longer meant to be a fully conforming subset of DITA 1.3, but of 2.0 instead.

Does this mean that the lwdita plugin must process MDITA/HDITA as DITA 2.0 in order to support these multimedia elements?

jelovirt / org.lwdita

`<audio>` does not work #180