Siebel Personalization Administration Guide > Targeting Content by Using Expressions >
Search expressions consist of inclusion and exclusion expressions. Inclusion and exclusion expressions relate content attributes to user profile attributes in order to control what content each user sees. Each expression is part of a rule that is part of a rule set that you can link to an applet for the purpose of controlling content.
Business components have existing visibility settings, for example, My visibility, All visibility, or Sales Rep visibility. There may be other search specifications configured in Siebel Tools. When a rule is evaluated at run time, its inclusion and exclusion expression are added to the business component as additional search specifications.
A rule can only return content that is within the scope of the business component's inherent visibility or search specifications as set in Siebel Tools.
EXISTS([Related Product] = GetProfileAttr("ProductInCart"))
shows products that are related to products in the Siebel eSales Shopping Cart.