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revision 1.2 by tjl, Wed Mar 5 10:50:08 2003 UTC revision 1.3 by tjl, Wed Mar 5 16:20:03 2003 UTC
# Line 22  Line 22 
22  %Hardware-Accelerated  %Hardware-Accelerated
23  by Unique Background Textures}  by Unique Background Textures}
24    
 \newauthor{tjl}{\censor{Tuomas J. Lukka}}{}  
25  \newauthor{jvk}{\censor{Janne V. Kujala}}{}  \newauthor{jvk}{\censor{Janne V. Kujala}}{}
26    \newauthor{tjl}{\censor{Tuomas J. Lukka}}{}
27  \affiliation{\censor{  \affiliation{\censor{
28    Hyperstructure Group\\    Hyperstructure Group\\
29    Dept.~of Mathematical Information Technology\\    Dept.~of Mathematical Information Technology\\
# Line 226  or vector fields\cite{ware95texture}. Line 226  or vector fields\cite{ware95texture}.
226  % In this article, we apply texture shading to synthesize a large number  % In this article, we apply texture shading to synthesize a large number
227  % of unique textures for distinguishing virtual objects.  % of unique textures for distinguishing virtual objects.
228    
229    XXX Interrante
230    
231    
232  \subsection{Focus+Context views}  \subsection{Focus+Context views}
233    
# Line 272  or flat 2D images or maps\cite{fc-taxono Line 274  or flat 2D images or maps\cite{fc-taxono
274  % In this article, we  % In this article, we
275  %  %
276    
277  \subsection{Data Identity}  %  \subsection{Data Identity}
278    %  
279  % Reason this is important for the article:  %  % Reason this is important for the article:
280  % uniq.textures really help only on systems that do this part right.  %  % uniq.textures really help only on systems that do this part right.
281    %  
282  The identity of data is an important concept which  %  The identity of data is an important concept which
283  most current computer systems have not been programmed to handle properly,  %  most current computer systems have not been programmed to handle properly,
284  and is usually not visualized at all: icons are used to represent different  %  and is usually not visualized at all: icons are used to represent different
285  file {\em types}, instead of the identities of the actual files.  %  file {\em types}, instead of the identities of the actual files.
286  Some systems (e.g., KDE) show previews of the files in the icons,  %  Some systems (e.g., KDE) show previews of the files in the icons,
287  which is useful but is not the same as showing the identity.  %  which is useful but is not the same as showing the identity.
288    %  
289  % The concept of ``file'', which was developed early in the history  %  % The concept of ``file'', which was developed early in the history
290  % of computers has become so pervasive that...  %  % of computers has become so pervasive that...
291    %  
292  For instance, consider a published scientific article  %  For instance, consider a published scientific article
293  available through several different URLs on the WWW,  %  available through several different URLs on the WWW,
294  e.g.,~through ResearchIndex\cite{giles98citeseer%,lawrence99digital  %  e.g.,~through ResearchIndex\cite{giles98citeseer%,lawrence99digital
295  },  %  },
296  the ACM portal and the author's web site.  %  the ACM portal and the author's web site.
297  Now, when a user downloads and saves one copy, the relationship between  %  Now, when a user downloads and saves one copy, the relationship between
298  the local copy and the original on the WWW is severed, so  %  the local copy and the original on the WWW is severed, so
299  in the computer's opinion there are now {\em four} different entities,  %  in the computer's opinion there are now {\em four} different entities,
300  whereas the user thinks of them as the same article.  %  whereas the user thinks of them as the same article.
301    %  
302  When following another link to the same article at a different  %  When following another link to the same article at a different
303  server, the computer has no idea that the article has already been downloaded  %  server, the computer has no idea that the article has already been downloaded
304  (from another server) by the user,  %  (from another server) by the user,
305  and that the user has annotated that version  %  and that the user has annotated that version
306  of the article.  %  of the article.
307  The burden of matching the identities and locating the local version, if desired, is on the user.  %  The burden of matching the identities and locating the local version, if desired, is on the user.
308    %  
309  In a system based on identities, all references to the article would be made through  %  In a system based on identities, all references to the article would be made through
310  the same identifier. The computer {\em would} know that this is a familiar article  %  the same identifier. The computer {\em would} know that this is a familiar article
311  and would also be able to show the user's annotations;  %  and would also be able to show the user's annotations;
312  it would even be possible to show anyone else's published annotations and links  %  it would even be possible to show anyone else's published annotations and links
313  to the article.  %  to the article.
314    %  
315  Systems and protocols based on identities as opposed to files  %  Systems and protocols based on identities as opposed to files
316  {\em do} exist, but mostly still only in research stage: for example,  %  {\em do} exist, but mostly still only in research stage: for example,
317  the Xanadu hypermedia model\cite{lukka02guids,ted-xanalogical-structure-needed},  %  the Xanadu hypermedia model\cite{lukka02guids,ted-xanalogical-structure-needed},
318  Open Hypermedia systems\cite{davis92openhypermedia},  %  Open Hypermedia systems\cite{davis92openhypermedia},
319  URN (Uniform Resource Name)\cite{rfc1737}, and  %  URN (Uniform Resource Name)\cite{rfc1737}, and
320  URN-5\cite{fallenstein02urn5}.  %  URN-5\cite{fallenstein02urn5}.
321  % and additionally, the recently opened  %  % and additionally, the recently opened
322  % informal URN-5 namespace\cite{fallenstein02urn5} is  %  % informal URN-5 namespace\cite{fallenstein02urn5} is
323  % one example of a different direction of identity.  %  % one example of a different direction of identity.
324    %  
325    %  
326    %  
327  % Different versions  %  % Different versions
328    %  
329  % The reason for this state of the matter is that  %  % The reason for this state of the matter is that
330  % there is little direct benefit for developing software which  %  % there is little direct benefit for developing software which
331  % handles identities better, because the current user interfaces cannot  %  % handles identities better, because the current user interfaces cannot
332  % use the information to advantage; likewise, developing such interfaces  %  % use the information to advantage; likewise, developing such interfaces
333  % is next to useless without having the backend functionality.  %  % is next to useless without having the backend functionality.
334    
335  \section{The XXX xupdf user interface --- the motivation for unique backgrounds}  \section{The XXX xupdf user interface --- the motivation for unique backgrounds}
336    

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