Description
mixed 
yaz_wait ( [array &options] )
   This function carries out networked (blocked) activity for outstanding
   requests which have been prepared by the functions 
   yaz_connect(), yaz_search(), 
   yaz_present(), yaz_scan() and 
   yaz_itemorder().
  
   yaz_wait() returns when all servers have either
   completed all requests or aborted (in case of errors).