Idoc -> JMS queue using ABAP Mapping

Hi all,

I am doing a idoc to JMS queue scenario using ABAP Mapping. I am new to ABAP

Basically i want to know how to read the OUTBOUND idoc segments and their field values. I have gone through link : IDOC--XI--IDOC Using ABAP MAPPING(Idoc to Idoc using ABAP Mapping).

If any body could suggest me how to read idoc->segment->fields or give some sample code, it would be very helpful.

Thanks in advance&

Regards,

Mani