Nested or Subquery help

i am new to SQL Server DB.
i have a typical query problem.
master table contains Data in following format
id stype sid svalue
1 status 1 approved
2 status 2 pending
3 request 1 draft
4 request 2 waiting
etc

in my query i need to substitute the svalue in place of sid
e.g.
select requestid ,bstatus, brequest from request ;
should give
----------
R1122 approved draft
----------
instead of
R1122 1 1
*****************
link field is column name (quite unusual )
like for status column , it is bstatus column name and it is stored in master table as status .

i need to do the following in 1 query only.
kindly suggest some nested query to do the same
kindly help
Smitaselect requestid
, s.svalue as statusvalue
, r.svalue as requestvalue
from request
inner
join master as s
on bstatus = s.sid
and s.stype = 'status'
inner
join master as r
on bstatus = r.sid
and r.stype = 'request'