It looks like this question was asked in this thread, but was not resolved. I hope it doesn't sound redundant, but it seems there must be a way to accomplish this in org mode.
In my example, I am testing the include with an HTML footer. The footer contains the basic information:
<br>
<h2>This is the footer.</h2>
<p>You can put stuff here.</p>
<br>
Included in the org mode file thus:
#+INCLUDE: "footer.html" html
It displays like this after HTML export, in the final HTML document:
<br> <h2>This is the footer.</h2> <p>You can put stuff here.</p> <br>
I am using org mode version 9.0.3.
Perhaps INCLUDE:
is the wrong way to go about accomplishing this?