Programming Guides › Programming Guide for C › Authorization API › Active Expressions

Active Expressions

An active expression is a string of variable definitions that comprises an active policy, rule, or response. Active expressions are constructed in the Administrative UI using the following syntax:

<@ lib=<lib-spec> func=<func-spec> param=<func-params>@>

In the syntax example:

• lib-spec is the path to a custom shared library. This clause is required.

  If you place the library in the default location, you need only specify the library file name rather than a path. Default locations are defined in Authorization API Overview.

  Also, the extension .dll or .so is optional.

• func-spec is the name of a user-defined, externally-visible function defined in the shared library. This clause is required.
• func-params is a parameter string to be passed to the function. This clause is optional.

SiteMinder constructs the active expression from information provided in the Active Rule Editor, Active Policy Editor, or Active Response Attribute Editor dialog box.