<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE root[

    <!ELEMENT root (line,lang)>

    <!ELEMENT line ANY>

    <!ELEMENT lang ANY>

    <!ENTITY film "Harry Potter series">

]>

<root>

         

      <!—Entity reference reference -->

    <line>Favourite cinema is &film;</line>

 

      <!—Character reference -->

    <lang>&#x03A0; value is 22.7</lang>

</root>

The output from above example will be:

<root>

<line>Favourite cinema is Harry Potter series</line>

<lang>Π value is 22.7</lang>

</root>