Hi all,

I am testing SPIN rules in the demo version of Virtuoso 8 but I have
still no success.
I wrote a simple SPIN rule to compute the area of an instance of a
class Rectangle given its width and its height. In this script you can
see all the queries I used. This script must be executed in the SQL
console of Virtuoso 8.

https://tinyurl.com/yb359owr

As you can see here at the bottom,

http://imageshack.com/a/img923/1182/qG4HmJ.png

the rule is loaded but it does not work when I run a query

http://imagizer.imageshack.us/a/img922/7629/it260O.png

For you reference, I was using this output as reference to see how the
loaded rule must look.

https://tinyurl.com/ycm3zp6p

Also, I have read these links so far

https://medium.com/virtuoso-blog/virtuoso-8-0-creating-a-custom-inference-rules-using-spin-vocabulary-d7a060f859ef
https://www.mail-archive.com/virtuoso-users@lists.sourceforge.net/msg07790.html
https://www.linkedin.com/pulse/reasoning-inference-using-british-royal-family-part-idehen
https://medium.com/virtuoso-blog/using-british-royal-family-data-snippets-to-demonstrate-sparql-query-language-based-reasoning-56626a152419
http://docs.openlinksw.com/virtuoso/udt_overview/

BTW, in RDF4j works. I do not need to load the rule separately, I just
loaded the full ontology and that's all, the SPIN rule worked. See

http://imagizer.imageshack.us/a/img924/7717/Q9JYau.png
http://imagizer.imageshack.us/a/img924/9828/4dQPzg.png


Any idea?

Thanks in advance,

Adam

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