How to get a structure of a transparent table?

Dear all,

I have a transparent table.

Now I hardcode its structure like:

TYPES: BEGIN OF PSA_STRUCTURE ,

REQUEST(000030) TYPE C,

DATAPAKID(000006) TYPE N,

PARTNO TYPE INT4,

RECORD TYPE INT4,

...

END OF PSA_STRUCTURE .

It's very rigid.

How can I detrmine the table structure and use it in DATA: ...TYPE... and ...TYPE TABLE OF..., as well as in FIELD-SYMBOLS statements?

Best regards,

Eugene