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# CategoryExpandTopics

Allows you to expand a query that might contain category topic names into a full query, which replaces the category names with the queries that they represent.

Note: This is an administrative action that can be sent only from AdminClients (which are set in the `[Server]` section of the configuration file).

Note: `CategoryExpandTopics` works only with categories that have Boolean training. For example, if you have a category A with training `cat AND dog` and category B with training `apples AND bananas`, sending the `CategoryExpandTopics` action with the `Expand` parameter set to `A AND B` would result in IDOL Server expanding this string to `cat AND dog AND apples AND bananas`.

## Example

    http://localhost:9000/action=CategoryExpandTopics&Expand=genome

This action uses port `9000` to instruct IDOL Server, which is located on the local machine, to return the expanded query represented by the topic `genome`.

## Parameters

Parameter | Description | Required
--- | --- | ---
AndQuery | Whether to query the data index with the expanded query. |
Expand | The query text to expand. |
Explicit | Whether to expand only those topics that have explicit topic syntax. |
Schema | Restrict the expansion to topics in a specific category and its descendants. |
UserName | The name of the user that sends the action. |

This action accepts the following standard ACI action parameters.

Parameter | Description
--- | ---
ActionID | A string to use to identify an ACI action.
EncryptResponse | Encrypt the output.
FileName | The file to write output to.
ForceTemplateRefresh | Forces the server to load the template from disk.
Output | Writes output to a file.
ResponseFormat | The format of the action output.
Template | The template to use for the action output.
TemplateParamCSVs | A list of variables to use for the specified template.

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