[Radiant] r:navigation help

[BJ Clark]

Hello all,
Another n00b question for you guys.
I'm trying to generate a list block of all the published children of
my home page.
I'm assuming, via the UsingRadiant page on the wiki, that I need to use:
<r:navigation urls="[Title: url; Title: url; ...]">
    <r:normal><a href="<r:url />"><r:title /></a></r:normal>
    <r:here><strong><r:title /></strong></r:here>
    <r:selected><strong><a href="<r:url />"><r:title
/></a></strong></r:selected>
    <r:between> | </r:between>
  </r:navigation>

First, what should I be putting in the "Title: url" section? Somethign
about r:children?
Second, I don't understand what the r:normal, r:here and r:selected
stuff are doing. Shouldn't that be rendering different "class=" or
something?

Is there anywhere else on the wiki that talks about this?
Thanks
BJ Clark