This topic describes how to use the variable center.
Background information
Description: Compared with a constant, a variable indicates a dynamic computing process. The decision-making engine computes the results of variables based on input parameters by using specific computing logic. The decision-making engine can compute the results of variables by using functions, scenario recognition models, or velocity metrics. For example, the decision-making engine can use a function that extracts the suffix of email addresses, an Account Abuse Detection Pro model, or a metric that indicates the number of accounts associated with an IP address in an hour to compute the results of variables.
Scenario: Alibaba Cloud expert team updates and publishes variables in the variable center from time to time. You can use variables that are provided in the variable center when you configure policies. The variable center allows users without knowledge of algorithms or technical development to apply variables in their design and configure custom policies. For example, if you want to use a fraud detection model in the registration scenario, you can use the Account Abuse Detection Pro-Rating variable that is provided in the variable center.
Feature description
1. Variable selection
If you want to use a variable in an event, you can select the variable and associate it with the event.
Step 1: Select the variable that you want to associate with an event. Step 2: Configure the association between the variable and the event. Step 3: Use the variable in a policy.
You can use a variable in the decision-making engine by using one of the following methods:
1. On the Variables tab of the variable center, select the variable and associate it with an event in the Variable Details panel.
2. On the Variable Management tab of the variable center, click Add Variable. In the Add Variable panel, select a variable and associate it with an event.
2. Custom list
The decision-making engine allows you to create lists and use them as variables. The decision-making engine supports various types of lists. For example, you can create a whitelist, blacklist, graylist, or VIP list based on your business needs. To use a list in a policy, perform the following steps:
Step 1: Create a list by specifying the list name, description, and import method. Import the list items based on the import method. Step 2: Use the list in a policy.
When you create a list, you can select Upload Later as the import method to leave the list items unspecified. After the list is created, you can click Import in the Actions column for the list to import the list items.
The limits on lists vary with the commercial edition of the decision-making engine. For more information, visit the buy page of the decision-making engine.
3. Custom velocity variable
A velocity variable is used to monitor a specific type of behavior of a subject over a period of time. You can configure velocity variables based on your business scenario. Velocity variables support a variety of computing methods, such as summation and counting. You can also compute the results of velocity variables by the specified interval, for example, by day, hour, or minute. For more information, contact Alibaba Cloud.