HOWTO duplicate the DocBook5 element reference synopsis

Hi:

I'd like to duplicate the DocBook5 element reference synopsis layout.

Looking at the generated HTML, I see the following:

> <div class="refsynopsisdiv" title="Synopsis">
> <h2>Synopsis</h2>
> <div class="itemizedlist">
> <ul class="itemizedlist" compact="compact" type="disc">
> <li class="listitem">Zero or more of:

In the <li> item above, what DocBook5 tags produce the "Zero or more
of:" run-in with no markup?

TIA,
jec