boxing words

[Julian Onions <julian.onions@gmail.com>]

Hi, hope this is the right list.

I'm new to docbook and its syntax, and I'm trying to replicate an existing look.
This has keyboard input set in fixed-width text but surrounded by a box.
I'm currently using <keycap>F1</keycap> within the docbook, but I'm unsure how to do the border.

I can get the html versions of this to work ok, using a CSS style, and
attaching it to the appropriate <span> construct. I've no idea
how to do the same in PDF/FO though. 

I use the following CSS in HTML, and am looking to try and get something close in PDF. 
{
    font-weight: normal;
    font-variant: small-caps;
    border-style: solid;
    border-width: 1px;
    border-color: black;
    color: black;
}

Along similar lines, I'd like to be able to get <application>
text rendered in green - which I imagine is a similar set of steps. 

Any hints? Thanks,
Julian.