small error in Section 3.3.4.2

> This example defines the selected attribute to be a boolean attribute. 

> selected     (selected)  #IMPLIED  -- reduced inter-item spacing --

The comment "reduced inter-item spacing" seems connected to the boolean attribute "compact" 
rather than to "selected". You may want to check.
Best regards.
Daniela Musto
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Daniela Musto
Italian National Research Council -
Institute for Information Processing                                              
Via Santa Maria 46                                       
I-56126 Pisa (Italy)                                        
e.mail: musto@iei.pi.cnr.it
http://faure.iei.pi.cnr.it/~musto
phone: +39.050.593.450
fax: +39.050.554.342
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~