, also called shopbots, are Web software applications that can help online shoppers find lower price for commodities or services. Price comparison services
was the earliest service a comparison-shopping agent provides. To search the price of a particular item, a comparison-shopping agent would search multiple online stores based on the keyword the online shopper provides. The keyword could be an ISBN number of a book or something like "iPod."
The first widely recognized comparison-shopping agent was BargainFinder developed by then Andersen Consulting and its SmartStore center.
- it is a an example of Semantic web
- They rely on wrappers: extensive programming required
- Wrappers need to be reprogrammed when an online store changes its outfit
- Wrappers extract information based on textual analysis
2-Limited information extracted