When we create data model we perform " save as sample data". My question is how i access the xml file for uploading xml data in ms word.?
That sample data cannot be exported. BIP uses that sample data to show previews of reports in the catalog and some detail views. You can only use the Export button on the Data tab to get xmls from your query. So you can run a query which returns the same data as in sample data and export it out.