- From: Frank Manola <fmanola@acm.org>
- Date: Sat, 5 Jan 2008 16:23:44 -0500
- To: Garret Wilson <garret@globalmentor.com>
- Cc: SWIG <semantic-web@w3.org>
On Jan 5, 2008, at 4:14 PM, Garret Wilson wrote: > Frank Manola wrote: >> In a graph of triples, there are as many relations as far as >> *semantics* are concerned as there are distinct predicates >> included in those triples (not one per resource, as you had it >> earlier). > > When I was describing relations based upon Date's interpretation, I > spoke incorrectly; I should have said "one relation per resource > type" (e.g. <foaf.Person>). Date's interpretation, though, is independent of the relational design involved. That is, his interpretation of what a relation means applies whether your design calls for a single Person relation (with a whole bunch of columns describing each person), or a design that, due to normalization requirements, involves breaking the description of a person up into multiple relations, e.g., a separate relation for associating each person with his/her relatives, or his/ her hobbies (this is an example of your multiple properties). > > (Multiple types per resource is a whole different can of worms that > I don't even want to bring up until I read a little more...) > > Garret
Received on Saturday, 5 January 2008 21:24:06 UTC