The b-i inline element specifies content that should be formatted in bold and italic. Whereas in HTML you would do something like <b><i>This is bold and italic text.</b></i>, this is the only element you need to wrap your content in to get the effects of both bold and italic.
b-i is a specialization of ph.
+ topic/ph d4p-formatting-d/b-i
<p>The name of the XML architecture we use is <b-i>DITA</b-i>.</p>