Thanks for having a look. Are you referring to the contents of the web part titled (by default) 'Sample Set Contents'? If so, when I add that web part I see two columns displayed, 'Name' and 'Flag' in the grid view. Looking over the available columns that are listed when I customize the grid view, I see both 'Name' and 'Id' but not 'Name Expression'. Let me know if I'm not looking in the correct place for Sample Set details.