The three signals below should look the same, but they don't. The first version, where there are no citations around the third argument, the 'data(addr-inf)' is not rendered correctly.
!definelong CALL(from,to,message)
from -> to : message
!enddefinelong
CALL(SysService, SMW, mysignal(data(addr-inf), a))
CALL(SysService, SMW, "mysignal(data(addr-inf), a)")
SysService -> SMW : mysignal(data(addr-inf), a)