Reason BSFN run on server or client&server?

Hi,

We don't know the reason BSFN are Client or server/client, for example web don't support P91300 because it's Clietn only, but what is reason?

Client only:

B91300A.c - Scheduler Date/Time Functions
N91300A.c - Scheduler Interactive NER functions
B91300B.c - Prompt for Scheduler WF & Report Data Structures
N91300B.c - Scheduler client only interactive functions
B91300C.c - Scheduler business functions

out of these BSFN's only B91300A and N91300A run on the server, rest of all are client only BSFN's which cannot be accessed by web

client. Hence due to this reason we cannot run the P91300 application on the web client.