> > But who is deciding the LCC or Dewey Classification code ? Should it 
> > be the publisher's initiative ? Is there a way to get those 
> > information automatically ?
> 
> For books published in the US except for those categories listed at 
> http://www.loc.gov/publish/cip/about/ineligible.html , the Library 
> of Congress creates all of the CIP data based on information provided 
> before publication by the publisher.  It's not up to the publisher to 
> suggest these.  If you want to find classification data for existing 
> titles (as above, mostly only those published in print), you could 
> query the Library of Congress catalog or WorldCat.

Conveniently, those ineligible  categories include: 

"Books published in electronic format"

Cheers
stuart