NotationDecl(p, name$, base$, sysid$, pubid$)
name$ parameter. The base$ parameter is the base
to use for relative system identifiers. It is set by parser:SetBase() and
may be Nil. The sysid$ parameter is the system identifier specified in the entity
declaration and is never Nil. The pubid$ parameter is the public ID given in the
entity declaration and may be Nil.