Bold text for v5?

[Limper Nikki <nlimper@earthlink.net>]

  Is this the correct way to do bold text for v5?

<emphasis role="strong">text to be bold<emphasis>

you tag both bold and italic text with the emphasis tag and add an  
attribute of strong to bold in the structure pane?)
Is there a way to map a bold character style to do this automatically  
for long books?
What if you have several bold styles for different fonts?