JD Edwards Voucher Types

Hi,

I'm really new with financial systems and am trying to determine which entries in the G/L are manually keyed into ledger versus the ones that are posted through batches, sub ledgers or other systems automatically.

I have found a field called "Voucher Type Code" which I think defines the entry's sources and it contains data such as AP, AR, CAN, CHQ etc. So what I am looking for is a description of what each of these codes mean or any other documentation on what fields are provided within JD.

Thanks for your help