DOCBOOK: Non breaking spaces or "ties"?

[Robert Withrow <bwithrow@nortelnetworks.com>]

How does one encode a non-breaking space (called a "tie"
in the TeX world)?  In other words, if I enter the text 
"Mr. Jones", I never want the line to break between
the "Mr." and the "Jones".  

Likewise, how do I encode words to prevent hyphenation?
Like, my name, which I *never* want hyphenated!  ;-)

[Actually, I'm curious what ambitions DocBook has toward
high-quality typesetting, where considerations like the above
come into play...]

Thanks!

-- 
Robert Withrow -- (+1 978 288 8256, ESN 248)
BWithrow@NortelNetworks.com