DOCBOOK-APPS: show-ulinks

My customisation of the DSSL print stylesheet turns on %show-ulinks and
unfortunately long urls that go past the end of the line are truncated. 
Is there a way either to force the url on to the next line or break it
to the printed version is complete ? 

 Ian Moor

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Ian W Moor                     Department of Computing,     
            Imperial College.            
  Tel +44 20 7594 8250         180 Queensgate               
                               London SW7 2BZ UK.