extending crisp to fuzzy

[alisha jindal <al...@gmail.com>]

Hello List

I am  trying to extend a simple crisp student ontology having a few number
of classes
to a fuzzy ontology.
I am trying to introduce fuzzy concepts(linguistic variables) such as {
dull,average,bright,very bright}  on the basis of the percentage of marks
obtained by a student
and also introduce membership degrees.

I wanted to know whether jena will allow such an extension
i.e. introducing membership degrees  and linguistic variables.

Thanks
Alisha

Re: extending crisp to fuzzy

[Fariz Darari <fa...@gmail.com>]

Dear Alisha,

You can use a consistency-preserving translation method from Goedel ALC
ontology into its corresponding crisp ontology. The translation method can
be done programmatically and then you do the crisp reasoning using Jena.
The method is provided here:
http://lat.inf.tu-dresden.de/teaching/ws2011-2012/FDL/FDL.pdf on page 15.
Please be aware that there are some typos on the provided file.

Kind regards,
Fariz
FU Bolzano (Student)

On Thu, Jun 28, 2012 at 9:18 PM, Dave Reynolds <da...@gmail.com>wrote:

> On 28/06/12 18:27, alisha jindal wrote:
>
>> Hello List
>>
>> I am  trying to extend a simple crisp student ontology having a few number
>> of classes
>> to a fuzzy ontology.
>> I am trying to introduce fuzzy concepts(linguistic variables) such as {
>> dull,average,bright,very bright}  on the basis of the percentage of marks
>> obtained by a student
>> and also introduce membership degrees.
>>
>> I wanted to know whether jena will allow such an extension
>> i.e. introducing membership degrees  and linguistic variables.
>>
>
> There's no built in support for fuzzy OWL (in any of its variants).
> However, there's nothing to stop you defining an ontology for representing
> fuzzy categories and functions.
>
> Dave
>

Re: extending crisp to fuzzy

[Dave Reynolds <da...@gmail.com>]

On 28/06/12 18:27, alisha jindal wrote:
> Hello List
>
> I am  trying to extend a simple crisp student ontology having a few number
> of classes
> to a fuzzy ontology.
> I am trying to introduce fuzzy concepts(linguistic variables) such as {
> dull,average,bright,very bright}  on the basis of the percentage of marks
> obtained by a student
> and also introduce membership degrees.
>
> I wanted to know whether jena will allow such an extension
> i.e. introducing membership degrees  and linguistic variables.

There's no built in support for fuzzy OWL (in any of its variants). 
However, there's nothing to stop you defining an ontology for 
representing fuzzy categories and functions.

Dave