Bossam Rule Language is a query language created in 2004.
| #3362on PLDB | 20Years Old |
prefix family = http://family.com/Family#;
namespace = http://family.com/Johns#;
rule r1 is
if
family:isFatherOf(?x,?y)
and family:isBrotherOf(?z,?
then
family:isUncleOf(?z,?y);
fact f1 is
family:isFatherOf(John,Bob);