This page illustrates a simple extension to TinyMCE: new buttons are added
to the tool bar which tag selected text using non-HTML elements
person, place, and org.
In this version the buttons are displayed normally. Compare the XSLTForms+TinyMCE version of this test case, in which the buttons do not appear.
Select some text and click one of the new buttons, then
click the HTML ('code editor') button to see the tagging.
Or click in one of the tagged phrases, and see the path information
in the status area.
Automatic styling to make the tagging visible ought to be possible, but hasn't been successful yet.