Dewey, signage and non-fiction

Here is an interesting article about the future of Dewey to classify non-fiction in public libraries.
http://www.libraryjournal.com/article/CA6698264.html

A key aspect I take from this discussion is the importance of having good signage, and I think shelf guides with words on them do add a useful element for library users browsing for information...

Here are subject shelf guides in the non-fiction at Paihia School (click on the picture to enlarge it).