WoW:API SimpleHTML SetText
PLACEHOLDER CONTENT WHILE I WRITE A REAL PAGE:
Accepts content in one of two forms.. "HTML" and "Plain"..
Plain form is the normal WoW markup with pipe delimiters.
HTML form uses a subset of HTML (You seem to be able to have WoW markup in the data) with the following tags:
HTML BODY
Within the BODY tag, you can have: H1 H2 H3 P BR IMG
H1, H2, H3, and P are identical unless you've specified header fonts in the XML for the frame.
Within H1, H2, H3 and P, you can have BR and A tags.
The P H1 H2 and H3 tags can have align attributes The IMG tag can have align, width, height, and src attributes.
I think most entities are supported, but I'm not sure. Non-ascii characters need to use the &#NNN; encoding (I think that's the right format)