How can you make a field "key" in transformation rules - master data maping

Question

Hello ,
We are in the process of creating some custom master data datasources for HR module. In this we are trying to extract fields from particular infotypes. In my situation we are pulling fields from only one table PA0032.  From this table I am making a view where in I am selecting all the key fields from that table and including 2 other fields (Buliding name and room number). Now I create an ATTR master datasource with this view and check in RSA3 I see the data very good. All this is time dependent data like for Employee he might be in buliding AB room 32 first and then get moved to Buliding CD room 34. So we need to keep a history of the records. Now I replicate the DS in BW system, and create custom infoobjects for building and room no. I create an infoobject called Zworkaddress and dates I use 0VALIDTO and 0VALIDFROm. I make both the dates, bulding and room as attributes of ZWORKADDRESS. Now I map all the fields from datasource to the infoobject but field ZWORKADDRESS is on,y coming up as KEy field not the dates and subtype. Thats why I am getting only the last record not all the records of the emplyee work address. 
We are using BI 7.0, so my question is how can I make the other fields as key's so that I can have all records.
Thanks in advance.

Answer 1

Kiran,
   If you make any one time dependant system will create Dateto and date from internally. we don't need to add those.
1. for Employee, add Company Address as attribute. make this as Time Dependant. keep Subtype as Compounding key to your employer. then you will get Employee, Sub Type and Dates as key fields. you can have complete history of Employee Address change.
Hope this helps.
Nagesh Ganisetti.