Get relationship of roles (composite/single) remotely

Hello,

We have to analyze the structure of composite and single roles externally (via Java - JCo middleware). Is there a simple way - without changing the R/3 system (i. e. remote RFC modules) - to extract the relationship information of composite and single roles? In which tables is the information stored? I would need this information for non-CUA and for CUA environment.

Thanks for your help.

Kind regards,

Jens Runge