BRS or URS first? Sequence of BRS, URS, SRS, FRS, HLD, DLD

[PMHUB]

A question in PMHUB Forums:

http://forums.pmhub.net/viewtopic.php?f=19&t=15778

This query may be a simple query. But, I think it is very important.

After getting the requirements from the client, which document I need
to send in the first step either Business requirements specificiation
(BRS) or User requirements specification (URS) document? What is the
order that we need to follow in BRS, URS, SRS, FRS, HLD, LLD ?

Thanks in advance.

Regards,
Chandra