Temple University Hospital brass and a subcommittee of negotiators with the Pennsylvania Association of Staff Nurses and Allied Professionals will attend an "exploratory meeting" that could lead to a contract bargaining session, said Jerry Silberman, a union staff representative. PASNAP and Temple negotiators met yesterday with a state-appointed mediator, said Temple spokeswoman Rebecca Harmon. The meeting was "ambiguous," and did not include any negotiations, Silberman said. With contract talks stalled, 1,500 nurses and other medical professionals who are represented by PASNAP went on strike beginning March 31.