Also might want to look at meta-data, such as when data was updated (on your product data example). In one of my startups we measured how many products on shelf, differed from the retailers online description and found about half differed in some way.
Also might want to look at meta-data, such as when data was updated (on your product data example). In one of my startups we measured how many products on shelf, differed from the retailers online description and found about half differed in some way.