{	The IRDATA routines are designed to include the description of
	the RDATA fields for RRs of various types and classes.

	IRINIT should be called to initialize internal tables.

	IRDATA(class) returns a pointer to a table describing all
	RRs for the particular class

}

procedure irinit;extern;

function IRDATA(myclass:dclass):rdata_table_pointer;extern
.