Hello Tina, as Dave said, there is no sorting for rules. You need to re-model your data first, such that you have a timestamp or whatever. Then you could use SPARQL CONSTRUCT
Kind regards, Lorenz > My data arrives and saved randomly to my owl file: These four values are > the income of employee's four weeks so in week1, he earns 200, week2 300 > week3 150 and week4 280. > > I need some sorting in which I can describe if the Employee progresses each > week according to his salary. If he earns like 150, 200, 280, 300, then for > sure he progresses. > > Kindly if you described the required Jena rules here to accomplish this > goal? > > Best regards > > On Sat, Sep 24, 2016 at 1:15 AM, Dave Reynolds <[email protected]> > wrote: > >> On 23/09/16 23:17, tina sani wrote: >> >>> For instance, I have a data property employee_income which have four >>> values >>> for each employee. Employee1 have income Euro 200, Euro 300, Euro 150, and >>> Euro 280 . >>> >>> Is there any way using Jena rules or other way, in which we >>> compute/compare >>> these values in some ascending or descending way. The purpose of doing so >>> is to find out whether the employee progresses or not. If she earns in >>> ascending order like 150, 200, 280 and 300 Euro, it means progresses. >>> >>> Thanks for understanding. >>> >> If you mean you have simply four copies of the property then they aren't >> ordered. E.g. >> >> :employee :employee_income 150, 200, 280, 300 . >> >> is exactly the same set of RDF triples as: >> >> :employee :employee_income 300, 200, 150, 280 . >> >> and >> >> :employee :employee_income 300 . >> :employee :employee_income 200 . >> :employee :employee_income 280 . >> :employee :employee_income 150 . >> >> triples aren't ordered. >> >> You can certainly use SPARQL to query for values and to sort them. >> >> If you want to test if the income increased in order then you need to >> represent either the date of the income or the order in which the income >> arrived in your data. Once you've decided how you will do that then there >> will be ways in SPARQL or rules to do the test for progression. >> >> Dave >> >> >> >> >> -- Lorenz Bühmann AKSW group, University of Leipzig Group: http://aksw.org - semantic web research center
