The first example shows how a Web site tracks the items that a visitor views:

For this site, each visitor profile has a property called Products Viewed Recently that contains a list of IDs corresponding to the products that the visitor views. The scenario watches for a visitor to view any product from the catalog, and then updates his or her profile by adding the product’s ID (its repository ID) to the list in the Products Viewed Recently property. It uses an Action element, Change, to update the profile.

The site’s application developers can then use the new value in the property as a way to personalize content. For example, they could perform cross selling by setting up a slot that shows helmets by a given manufacturer to anyone whose Products Viewed Recently list contains one of that manufacturer’s bikes.