On Tue, Nov 18, 2008 at 4:02 AM, Tim Berners-Lee <timbl@w3.org> wrote: > > On 2008-11 -17, at 11:27, John Goodwin wrote: > > [...] > I'd be tempted to generalise or just remove the domain/range > restrictions. Any thoughts? > > > There are lots of uses for rand and domain. > One is in the user interface -- if you for example link a a person and a > document, the system > can prompt you for a relationship which will include "is author of" and > "made" but won't include foaf:knows or is issue of. > > Similarly, when making a friend, one can us autocompletion on labels which > the current session knows about and simplify it by for example removing all > documents from a list of candidate foaf:knows friends. > Both these use cases require some OWL to say that documents aren't people. I don't see these scenarios being feasible in the general case because you'd need a complete description of the world in OWL, i.e. you'd want to know about everything that can't possibly be a person. > > It is of course also important for checking hand-written files for > validity. > Again, isn't validity checking something that can only be done with OWL. RDFS only adds for information. > > Tim BL > Ian
Received on Tuesday, 18 November 2008 07:32:37 UTC