INFOSET QUERY

Hi,

any one help me on this topic..

1)how to creat a infoset on ODS or MASTER DATA ?

2)explain the steps for creating?

3)in production system what is the use of infoset ,how to support the production server through infoset?

plzzz, give me details on it,,becausse i am new for this topic and SAPBW...

regards,

goodyear...