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<DIV><FONT face=Arial size=2>Sorry for the naive question, but it is buzzing me
for so long time:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Is there any real DL systems currently available
that implement concrete domain together with reasonnably expressive logics
and that allow "attribute chains".</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am thinking about seemingly simple need like the
need of stating that any father is older than his son(s) A statement that would
involve a hasAge real attribute.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Racer does propose real attribute but it seems that
some mysterious difficulties prevent me from entering such
constraints</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Any clue?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>louis</FONT></DIV></BODY></HTML>