The following XHTML paragraph
<p>it's Greek to me Φ Δ Δ</p>
contains character references for Greek characters and renders as
it's Greek to me Φ Δ Δ
The following XHTML paragraph
<p>© 2006 k.mcmanus@gre.ac.uk & the University of Greenwich™</p>
contains character entities for copyright, ampersand and trademark characters and renders as
© 2015 k.mcmanus@gre.ac.uk & the University of Greenwich™