    class
    	DATABASE_TUPLE [G -> DATABASE create default_create end]

    General
    	cluster: dbms-support
    	description: "Implementation of DB_TUPLE"
    	create: make

    Ancestors
    	HANDLE_USE

    Queries
    	column_name (position: INTEGER_32): STRING_8
    	count: INTEGER_32
    	data: DATABASE_DATA [G]
    	item (index: INTEGER_32): ANY
    	map_table: ARRAY [INTEGER_32]

    Commands
    	fill_in (no_descriptor: INTEGER_32)
    	make
    	update_map_table (object: ANY)