Documenting process chains in SAP BW

Dear Experts,

we have nuilt a couple of hundreds of processchains with Meta Chains and subchains.

I am looking for a procedure how to coument those pcs with dependencies.

For. e.g let say a Meta chain has 3 subschains and one of the subchain is link to the second Mega chain.

Is there a Tcode or a table which can help to do such?

Thanks

Pat