The Column View and the Space View for Authoring a 
			Network Structure

Yasuhiro Yamamoto (1,2)
Kumiyo Nakakoji (2,1)
Atsushi Aoki (3)

1) PRESTO, JST
2) RCAST, University of Tokyo
3) SRA-KTL Inc.

The ART-SHTA (Sculptural HyperText Authoring) system 
integrates the three hypertext techniques for authoring a 
network of textual nodes: sculptural hypertext, spatial 
hypertext, and column-based browsing. The system 
provides the three-column view for focusing on one 
node while specifying links to and from the focused 
node by using the right and left-side columns that list 
the rest of the nodes. The space view is provided to 
overview all the existing nodes and the links among 
them while expressing emerging relationships among the 
nodes by freely positioning them in the space. We argue 
that the interaction design of the system makes it 
possible to integrate the two views to serve for the 
single authoring task.