SQL View to PostgreSQL View

Hi ,
I am trying to convert sql
view to postgresql view but i am getting the
following error i dont know how
to handle dbo.
in postgresql and when i remove dbo. from table name then view got created but it does not show any data, while this is working perfectly fine in sql, here is my code and error details 

CREATE OR REPLACE VIEW vwkbcomparesites as
select a.kbid kb_a, b.kbid kb_b, a.chr chr_a, a.start start_a, a."end" end_a, (a."end" - a.start)+1 tagsize_a, 
b.chr chr_b, b.start start_b, b."end" end_b, (b."end" - b.start)+1 tagsize_b,
    abs((a."end" + a.start)/2 - (b."end" + b.start)/2) centredistance,
case 
when a."end" <= b."end" and a.start >= b.start  
then (a."end" - a.start) 
when b."end" <= a."end" and b.start >= a.start   
then (b."end" - b.start) 
when a."end" <= b."end" and a.start <= b.start    
then (a."end" - b.start) 
when a."end" >= b."end" and a.start >= b.start
then (b."end" - a.start)  
end bpoverlap
from  dbo.kbsites a inner join dbo.kbsites b on a.chr=b.chr
inner join dbo.kbdetails kbd on a.kbid=kbd.kbid
where kbd.active='1' ;

i am getting this error , how can i fix this.

ERROR:  schema "dbo" does not exist
LINE 15:  from  dbo.kbsites a inner join dbo.kbsites b on a.chr=b.chr
                ^

********** Error **********

ERROR: schema "dbo" does not exist
SQL state: 3F000
Character: 761