Association analysis

market basket transactions
Retailers are interested in analyzing the data to learn about the purchasing behavior of their customers. Such valuable information can be used to support a variety of business-related applications such as marketing promotions, inventory management, and customer relationship management.
commercial entity resolution (ER) systems were developed around customer contact information.
Association analysis a little like infromation data collecting thus that can collect lots of the data relates their customers or product for example, one website is talikng about the food industry and news and this website is connecting lots of food infromation and news from government news or public news.
 http://www.just-food.com/companies/soil-association_id114
or something retairl industries would also use the association analysis
such as waitrose have some recipes in their website
http://www.waitrose.com/home/recipes.html
and therefore it is kind of asooscciation analysis connect with recipes and thier food products :)