ION is the transport mechanism and it has the capability to start a bshell in LN. Via that (1 or more) bshell BODs are read from LN and and send to LN.
There is no other standard method for this.
You can play around with tlesb3232m000 for getting data processed into LN. The session has the option to read 1 specific BOD (specify the file) and to read multiple (specify the folder).
The BOD structure in general can be found at http://schema.infor.com/
The LN specific implementation is documented, BOD mapping pdf files,and can be found in Infor Support Portal.
Also the LN-ION integration guide can give you information on what is available in this area.