A question on Standard Datasources

Hi Everybody,

I can get the field names of a standard data source(say for example 0plant_attr) using table ROOSFIELD .

Now i want to know from which tables these fields are coming from.

How to get the table name for a each field in datasource.

Another Question : What is object version 'D' in standard data source mean. Does that mean SAP has given it and that is what SAP recommends

Please advise.Points Assured