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revision 1.142 by tjl, Sat Feb 15 20:38:40 2003 UTC revision 1.143 by tjl, Sat Feb 15 20:40:07 2003 UTC
# Line 101  Introduction Line 101  Introduction
101  In several hypertext systems today, following a link means a *disruptive* change  In several hypertext systems today, following a link means a *disruptive* change
102  in the user's workflow, replacing the current context (e.g., a Web page) with an  in the user's workflow, replacing the current context (e.g., a Web page) with an
103  entirely different one.  entirely different one.
104    This is partly caused by the dominant graphical user interface paradigm
 ..  A focus+context view [fc-fisheye]_ of bidirectional links  
     can provide a *gradual* change by showing fragments of link targets  
     before a link is followed, and fragments of link sources after  
     the link has been followed (if links are bidirectional).  
   
 This is diffucult to realize in the dominant graphical user interface paradigm  
105  (developed in the 70s at Xerox PARC [XXX ref]) in which *pages*  (developed in the 70s at Xerox PARC [XXX ref]) in which *pages*
106  are shown in overlapping, rectangular, unconnected viewports (windows).  are shown in overlapping, rectangular, unconnected viewports (windows).
107  In this paradigm, following a link can only create a new window  In this paradigm, following a link can only create a new window
108  or replace the contents of the current window.  or replace the contents of the current window.
109  Alternatives, such as replacing part of text (XXX antont's reference; w3c link scopes),  Alternatives, such as replacing part of text (XXX antont's reference; w3c link scopes),
110  are not very popular nor intuitive... [XXXref]  are not very popular nor intuitive. [XXXref]
111  Improving user orientation through user interface improvements has  Improving user orientation through user interface improvements has
112  recently received much attention.  recently received much attention.
113    
114    ..  A focus+context view [fc-fisheye]_ of bidirectional links
115        can provide a *gradual* change by showing fragments of link targets
116        before a link is followed, and fragments of link sources after
117        the link has been followed (if links are bidirectional).
118    
119  One approach is to display information about the destinations of the links.  One approach is to display information about the destinations of the links.
120  Browsers' status lines or tooltips show the URL or the HTML link title of the link  Browsers' status lines or tooltips show the URL or the HTML link title of the link
121  that the mouse is currently over.  that the mouse is currently over.

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