Re: Semantics of rdf:Statement

On Jan 5, 2010, at 1:42 AM, Melvin Carvalho wrote:

>
>
> On Tue, Jan 5, 2010 at 7:54 AM, Pat Hayes <phayes@ihmc.us> wrote:
>
> On Jan 4, 2010, at 5:11 PM, darood wrote:
>
>
> Cheers Dan, I had one more question which I am a bit wary about:
>
> Is the following which I listed as transitive, symmetric and/or  
> functional
> correct?
> •       “taller than” - Transitive
>
> Yes.   Inverse would be "shorter than"
>
> •       “sister of” - Symmetric
>
> No. Mary sisterOf John, but not John sisterOf Mary.
>
> Inverse would be "has sister"
>
> •       “mother of” - Functional
>
> No. Mary motherOf Bill and Mary motherOf John is possible. motherOf  
> is inverse functional; hasMother (its inverse) is functional.
>
> •       “likes” - Symmetric
>
> Unfortunately, no. If it were, personal relationships would be a lot  
> easier than they are. Inverse would be "liked by"
>
> •       “eats” - Functional
>
> ??
>
> •       “neighbour of” - Symmetric
>
> Yes. This is its own inverse.
>
> Hoping not to be pedantic but im curious as to whether this is a  
> valid case:
>
> I am neighbour of noisey teenagers
>
> does that imply
>
> (All?) Noisey teenagers are neighbours of me?

You have to be careful. If 'noisy teenagers' is an individual, then  
yes, it does imply that, but ignore the 'all'. If its a class, then  
you have to say more precisely what relation holds between the  
property and the class...

Pat

>
>
> Hope this helps.
>
> Pat Hayes
>
>
>
> Can you help me get the inverse properties of each example?
>
>
> Thanks in adv.
> Darood
> -- 
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>
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------------------------------------------------------------
IHMC                                     (850)434 8903 or (650)494 3973
40 South Alcaniz St.           (850)202 4416   office
Pensacola                            (850)202 4440   fax
FL 32502                              (850)291 0667   mobile
phayesAT-SIGNihmc.us       http://www.ihmc.us/users/phayes