Mediator Specification

<f(N) join_entry {<ticker T><as_of A>

<last C><volume V><p_e P>}> :-

<quote {<ticker T><as_of A><last C>}>@smqs &

<quote {<ticker T><volume V>}>@dbcqs &
<N entry {<ticker T>}>@dbcns.

join_pred(f(N), C) :- company(N, C)@dbcns.