<!--Customizations-->
<!--Override the Block.extra entity-->
<!ENTITY % Block.extra 
     "| table | form | fieldset | biog:biography" >

<!--Override the Inline.extra entity-->
<!ENTITY % Inline.extra 
     "| input | select | textarea | label | button | biog:person" >

<!--Add the biog namespace to the html element-->
<!ATTLIST html
     xmlns:biog     CDATA
     #FIXED "http://www.simonstl.com/xhtml/xhtml-biography/">