The caution
directive is provided by the
admonition plugin.
The following markup:
[[!caution "Lorem ipsum dolor sit amet, consectetuer adipiscing elit."]]
Will show:
Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
It generates the following HTML, which is the equivalent:
<div class="caution">Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</div>
Other admonitions are available, see admonition for more and rationale.