Hi,
I haven't had much chance to work with user-defined rules, but if I remember this well enough, I think the third column is FILTER. You might want to try this :
INSERT INTO mdsys.semr_uni_rb VALUES(
'uni_rule1',
'(?x :authorOf ?p) (?y :authorOf ?p)',
*'?x != ?y',*
'(?x :coAuthor ?y)',
SEM_ALIASES(SEM_ALIAS('','http://www.owl-ontologies.com/UniModel.owl#')));
I hope this helps.
Regards,
Julien