As explained earlier in this chapter, you can use scenario elements, specifically the Change element, to update any property in your profile repository. The profile repository, however, also contains a property called Scenario Values that your application developers can set up to store any additional information about each visitor that you gather from scenarios – perhaps information that is valuable but of only occasional importance. The property can store more than one value at a time. In this case, the values are called “keys,” and when you use the Scenario Values property in a scenario, the ATG Control Center prompts you to specify the key to change.

Example: You decide that, for a few months, you will keep track of visitors who come to your site between the hours of 2:00 AM and 5:00 AM. Your application developers set up the Scenario Values profile property so that one of its keys is latevisitor and the possible values for this key are true and false. You create the following scenario:

This scenario watches for people to log into the site between the specified times, and then it changes the latevisitor key in the Scenario Values property to true. You can now use this value to personalize site content _in the same way that you would use any other profile property – for example, you can use it as a way to filter site visitors in another scenario or in a content targeter.

Note also that the Scenarios module includes a scenario element called Set Variable that you can use to track any type of information you want for the duration of a single scenario segment only. See Using Action Elements in Scenarios for more information.

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