Policy Server Guides › Policy Server Configuration Guide › User Directories › User Attribute Mapping › Define an Attribute Mapping › Expression › Expression Use Case

Expression Use Case

This use case shows how you can use an expression attribute mapping to simplify references to multiple user attributes in one directory.

Given:

This use case represents a basic scenario in which a protected resource requires the sort name of users (last name,first name). The user directory does not uniquely reference this user attribute, but does store the last name of users as surname and the first name of users as givenname.

Solution:

Map a common name to an expression that creates the sort name using the user attribute names specified by the user directory's underlying schema.

• Name the mapping SortName.
• Define SortName as:

  {surname + "," + givenname}
  

Note: The expression must conform to the syntax rules of a SiteMinder expression.

Result:

You can reference SortName when defining policies, expressions, or other objects that require the sort name of users, without concern for the directory-specific schema. SiteMinder calculates the sort name using the expression.

Note: Advanced use cases are shown in the Apply Attribute Mapping section. The advanced use cases detail how you use different attribute mapping types to identify the same user attribute across different directory types.