anchor.diff:  
   *Legacy DB element*: <emphasis>
   
  -*New HTML element*: <strong>
  +*HTML element*: <strong>
   
   *Special semantics*: class="bold" where appropriatefootnote:[From DocBook; no close match in EPUB 3 Structural Semantics Vocabulary]; potentially some other options
   
  
positive.code: 
  *Legacy DB element*: <note>, <tip>, <warning>, <caution>, <important>
  
  *New HTML element*: <div>
  
  *Special semantics*: class="note" or class="warning" (these are the two admon values in the EPUB 3 Structural Semantics Vocabulary spec; we can always define more if note/warning do not suffice)
  
  
negative.code: 
  *Legacy DB element*: <equation>
  
  *HTML element*: <div>
  
  *Special semantics*: class="equation"footnote:[From DocBook; no close match in EPUB 3 Structural Semantics Vocabulary]
  
  