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revision 1.91 by tjl, Thu Sep 18 12:37:05 2003 UTC revision 1.92 by benja, Thu Sep 18 13:07:34 2003 UTC
# Line 207  Under the hood: Hyperstructure Line 207  Under the hood: Hyperstructure
207  ==============================  ==============================
208    
209  At the bottom of an item-centered computing environment,  At the bottom of an item-centered computing environment,
210  is the *network of items*.  is the *network of items*. This network is a **hyperstructure**,
211  XXX  meaning that it allows an arbitrary number of data structures
212    to add information about an item through bidirectional connections.
213    For example, an address book structure may give
214    a person's name and e-mail, while a genealogy structure might
215    give their parents, children, and spouses.
216    
217    Hyperstructure may be implemented in many ways. In this section,
218    we present zzstructure and RDF, two hyperstructures actually used
219    in systems aiming at the goals we have described above [#databases-as-hyperstructure]_.
220    
221  .. In this section, we shall attempt to define what we mean by the word "hyperstructure",  .. In this section, we shall attempt to define what we mean by the word "hyperstructure",
222     as used e.g. in the name of the First Hyperstructure Workshop at XXX.     as used e.g. in the name of the First Hyperstructure Workshop at XXX.
# Line 777  Notes Line 784  Notes
784     about them, in this case the idea about how to develop     about them, in this case the idea about how to develop
785     one of them.     one of them.
786    
787    ..  [#databases-as-hyperstructure] Hyperstructure might also be
788        implemented, for example, as a relational database,
789        with individual data structures being represented as tables.
790        This would necessiate a system where users could add
791        new tables at any time, without hazzle.
792    
793  ..  [#zzstructure-rdf] RDF and zzStructure are actually closely  ..  [#zzstructure-rdf] RDF and zzStructure are actually closely
794      related: zzStructure is obtained if a RDF graph is constrained      related: zzStructure is obtained if a RDF graph is constrained
795      by two uniqueness conditions: for all x, y, there can be      by two uniqueness conditions: for all x, y, there can be

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