When using conditions in the charges area you might ask yourself, how to access data of the underlying BO.
This can be addressed by using the determination class /SCMTMS/CL_TCC_COND_DET_BOVAL.
This wonderful class makes the host BO data available for the TCM conditions. When entering the class, the data access definition behaves then like is would start at the root node of the entered BO.
An example for a BO access for TCM_PRECON can be seen here:
There are also some more specialized classes like /SCMTMS/CL_TCC_COND_DET_TOITM (for TOR item based accesses) and /SCMTMS/CL_TCC_COND_DET_TOSTG(for tor Stage/Stop_Successor based accesses)