Data Fields & Key Fields IN DSO

Hi Guys,
Can any one tel me what exactly key field holds & Data field hold in DSO.
Thanks,
Venkatesh

Hi,
A DSO serves as a storage location for consolidated and cleansed transaction data or master data on a document (atomic) level. This data can be evaluated using a BEx query.
A DSO contains
Key fields (such as document number, document item) and data fields that, in addition to key figures, can also contain character fields (such as order status, customer). The data from a DataStore object can be updated with a delta update into InfoCubes (standard) and/or other DataStore objects or master data tables (attributes or texts) in the same system or across different systems.
Key fields : It will contains both Chars and KeyFigures.
Data Fields : Based on this i.e. the charecterisctics which you will keep in this Data Fields, the DSO will over write the Data in DSO.
Overwriting functionality will works based on Data Fileds.
http://help.sap.com/saphelp_nw2004s/helpdata/en/f9/45503c242b4a67e10000000a114084/content.htm
Thanks
Reddy

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