Dear friends, barry, here is the reference: https://henrietteharmse.com/2018/04/21/creating-custom-rule-primitives-for-jena/
But, after searching more carefully, I found it is another tool using jena, but not jena at all. So, I wanted to confirm that such builtin was available. By the way, you say if I use dates with lessThan and greaterThan they should resolve to true or false?, an specific date format for that? Luis Ramos El mar., 21 ene. 2020 a las 15:14, Nouwt, B. (Barry) (<barry.no...@tno.nl.invalid>) escribió: > Hi Luis Ramos, where can we find this substractDates builtin? I cannot > find it in the source code: > > > https://github.com/apache/jena/tree/master/jena-core/src/main/java/org/apache/jena/reasoner/rulesys/builtins > > or the documentation: > > https://jena.apache.org/documentation/inference/#builtin-primitives > > There are lessThan, greaterThan builtins that evaluate to true if one data > is more recent than another. > > Regards, Barry > > -----Original Message----- > From: Luis Enrique Ramos García > <luisenriqueramos1...@googlemail.com.INVALID> > Sent: dinsdag 21 januari 2020 10:56 > To: users@jena.apache.org > Subject: substractDate built in > > Dear friends, > > I a trying to perform some operations with dates using rules in jena. One > of those is calculating ages. I found the built in subtractDates(x1, x2, > x3), and at first I wonder if this is a valid jena built in?, at second, I > implemented it with the rule 1 however it does not trigger as expected, > thus I wonder if the built in is properly implemented?. The date format I > am using is yyyy-MM-dd. > > @prefix ex: <http://www.example.com#>. > > [*rule1:* (?a ex:birthday ?d1) (?b ex:currentdate ?d2) subtractDates(?d1, > ?d2 ,?age) -> (?a ex:currentage ?age )] > > Where, d1 and d2 are xsd date time values, and age is decimal. > > I also implemented the greater than with integer numbers, and I got the > expected result, but I would like to know if there is a built in for date, > where I could evaluate to true when a date is more recent than another?. > > > Best regards > > > Luis Ramos > This message may contain information that is not intended for you. If you > are not the addressee or if this message was sent to you by mistake, you > are requested to inform the sender and delete the message. TNO accepts no > liability for the content of this e-mail, for the manner in which you use > it and for damage of any kind resulting from the risks inherent to the > electronic transmission of messages. >
