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# Display Online Help

You can display IDOL Expert and the IDOL Server Reference by sending an action from your Web browser.

For HPE IDOL Server to display help, the help data file (`help.dat`) must be available in the same directory as the service instance.

To display help for HPE IDOL Server

1. Start HPE IDOL Server.

2. Send the following action from your Web browser:

       http://IDOLhost:port/action=Help

   where:

   `IDOLhost` | is the IP address or name of the machine on which HPE IDOL Server is installed.
   `port` | is the ACI port by which you send actions to HPE IDOL Server (set by the `Port` parameter in the `[Server]` section of the HPE IDOL Server configuration file).

   For example:

       http://12.3.4.56:9000/action=Help

3. On the help landing page, click one of the following options to open the relevant help set.

   IDOL Expert | IDOL Expert provides conceptual overviews and expert knowledge of HPE IDOL Server and its features and functionality.
   IDOL Reference | The IDOL Server Reference contains details of all the actions and configuration parameters that you can set in IDOL Server.

   If you are new to HPE IDOL, you can use IDOL Expert to find out more about the different functions that IDOL can perform. You can use the IDOL Server Reference to look up specific configuration parameters and actions.

   Tip: You can also view the IDOL Server Reference without starting IDOL Server. In the IDOL Server installation directory, open the `help` directory and click `index.html`.

   The navigation panel for the IDOL Server Reference lists the following options to display reference information.

   Tab | Description
   --- | ---
   Actions | Describes the actions that you can send to HPE IDOL Server. Actions allow you to query HPE IDOL Server, and to instruct it to perform a variety of operations.
   Configuration Parameters | Describes the parameters that determine how the HPE IDOL Server operates. You can set configuration parameters in the HPE IDOL Server configuration file.
   Index Actions | Describes the index actions that you can send to HPE IDOL Server. Index actions allow you to index content into HPE IDOL Server, and to administer the HPE IDOL Server data index.
   Service Actions | Describes service actions. Service actions allow you to return data about the HPE IDOL Server service, and to control HPE IDOL Server.

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