SAP BPC 10 NW and PS SAP ECC - Hierarchy upload

Hello Experts,

Have somebody worked in a project integrating SAP ECC and BPC who can help me finding how to get a hierarchy of projects and wbs elements to extract from SAP ECC ?

Example:

• OI.0001 - Project 1
  •      OI001.01 - WBS element 1
  •      OI001.02 - WBS element 2

Thanks a lot,

Nadine