An Editor

I came across this, not sure if you've seen:

http://files.wymeditor.org/wymeditor/trunk/src/examples/15-rdfa-editor.html

Discussion:

http://forum.wymeditor.org/forum/viewtopic.php?f=3&p=2030

"Being able to edit RDFa with WYMeditor is one of our current main  
priorities, and we've been working lately on implementing some missing  
methods, such as insert, wrap and unwrap, to e.g. support more inline  
elements, ..."

-Elias