style attribute takes a space-separated list of styling hints. The display tool parses those hints to style the text as it is presented to the reader. Any displayable Mallard element can have a style attribute.
<note style="info"> <p>Settings from the <code>user</code> database file will take precedence over the settings in the keyfile.</p> </note> <note style="important"> <p><cmd>dconf update</cmd> must be run whenever you modify a keyfile.</p> </note> <note style="tip"> <p>You can also <link xref="dconf-lockdown">lock down</link> the settings to prevent users from changing them.</p> </note> <note style="bug"> <p>If dconf had any bugs, this is where you would mention them.
Unfortunately, dconf is awesome and does not have any bugs.</p> </note>
Note styles as displayed in Yelp