/[gzz]/manuscripts/FutureVision/vision.rst
ViewVC logotype

Diff of /manuscripts/FutureVision/vision.rst

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1.123 by tjl, Thu Sep 18 17:43:43 2003 UTC revision 1.124 by tjl, Thu Sep 18 17:48:03 2003 UTC
# Line 544  and hierarchies is currently being plann Line 544  and hierarchies is currently being plann
544  The system we are proposing is a logical extension  The system we are proposing is a logical extension
545  of several existing concepts and systems.  of several existing concepts and systems.
546    
 The *extensional* structure,  
 as introduced by `DeRose (1989)`_ is an important concept  
 in this context.  
   
547  5.1 Flexible structure - Unifying structured and unstructured information  5.1 Flexible structure - Unifying structured and unstructured information
548  -------------------------------------------------------------------------  -------------------------------------------------------------------------
549    
550    The *extensional* structure,
551    as introduced by `DeRose (1989)`_ is an important concept
552    in this context. The extensional structure
553    is, essentially, the external associations to
554    the document ("I liked it when I read it in march",
555    "It's a little similar in idea to that one", ...)
556    as opposed to the internal (intensional) structure
557    (sequence of sections, links to references section, ...).
558    
559  The Aquanet system, introduced by `Marshall et al (1991)`_,  The Aquanet system, introduced by `Marshall et al (1991)`_,
560  unified ideas from the freely structured hypertext systems  unified ideas from the freely structured hypertext systems
561  and tightly structure knowledge representation.  and tightly structure knowledge representation,
562  It used a frame-based representation,  allowing the extensional structure to be explicitly
563    represented in the system.
564    Aquanet uses a frame-based representation,
565  with custom schemas: classes contain slots to be filled by other  with custom schemas: classes contain slots to be filled by other
566  objects.  objects.
567  However, the system is still restricted to using separate  However, the system is still restricted to using separate

Legend:
Removed from v.1.123  
changed lines
  Added in v.1.124

savannah-hackers-public@gnu.org
ViewVC Help
Powered by ViewVC 1.1.26