TYPES AND TABLES

I want to define an internal table with other internal table inside.

For example:

TYPES: BEGIN OF S_DESCRIPCION,
       F_DESCR(30) TYPE C, 
       C_DESCR(30) TYPE C,
        END OF S_DESCRIPCION.
TYPES: BEGIN OF S_STATUS_F, 
       SFVACIO TYPE C, 
       SCVACIO TYPE C, 
       SMATERIAL TYPE C, 
       INCLUDE STRUCTURE S_DESCRIPCION.
 END OF S_STATUS_F.

It doen't work but this is my idea.

like

types: begin of s_table.

include structure sflight.

types: it_book type table of sflight.

end of s_table.

data: it_tabla type table of s_table,

wa_tabla like line of it_tabla,

wa_book like line of it_book.