Recruitment process outsourcing(RPO)

As we all know that India is expert country in the word of the out sourcing.
some of the special word which most of the people are familiar.
BPO( Business Process out sourcing)
KPO(Knowledge Process Outsourcing)
similarly
RPO is recruitment process out sourcing. where the recruiter will take the requirement from the company and provide the end to end services to the company related to recruitment.
If any one intrested in detail discussion about the RPO please mail me