Visualizing Keyword Distribution Across Multidisciplinary C-Space is an interesting article on using VisualNet to visualize available titles in a library.
The author Donald Beagle at Belmont Abbey College proposes the idea of C-Space or Concept Space. “As proposed here, c-space would be a construct comprising visual representations of all fields of knowledge or domains of discourse, meant to answer the need for a language-neutral, format-neutral medium through which theories about abstract knowledge and the representation of its various physical manifestations may be articulated and tested.”
The idea of C-Space origniated with a conversation with Isaac Asimov. Beagle has used the enterprise software VisualNet from Antarctica (founded by Tim Bray of XML fame) to create interactive visualizations.