Access Vendor Master

Dear all,

In our project we need to create, modify and read vendor master data in SAP ECC 5.0. Can anybody help to give the following information or a reference to relevant documentation?

1. The tables which contain the vendor master.

2. The BOR object representing vendor.

3. The BAPI and function module to access the data.

4. Vendor-related workflow

Many Thanks + Best Regards

Jerome