The fabric is more complex than permissonless platforms, like Ethereum, Bitcoin. As there is no detailed document describing the fabric, people aiming to modify fabric code has to read the source codes. This is also difficult.
It is better if someone could provide a document describing in detail the data flow from one component to another component in the following procedure: client application invoke a transaction, and finally query the state after the transaction. Here "component" refers to client application, ledger, and something like.
