The following is the requirement summary for building a new centralized file management system (FMS):

1. After merging the central FMS, each individual system will use web service to connect to it. And all files and related information will be put in a central place.

2. The central should have the following functions:

a. Authenticate

b. Upload (with all related information, such as file name, version number and category)

c. Update (reversion)

d. ListFile (all versions of a file)

e. Download

f. Delete

g. Rename

h. AccessVerify

3. Let each system change as few as possible, when merging the central FMS.

To issustrate the situation, please read the following diagram.

fms requirement Analysis