Relevant Roles and Allowed Roles are used in UI queries by the filtering mechanism. For more information, see Relevant Roles and Allowed Roles.
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 Key input box  | 
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 List drop-down list  | 
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 Data Type from the Select Type dialog box  | 
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 You can select True, False, or Unknown from the List drop-down. These options indicate if the data in the parameter is a list, not a list, or might be a list. If the parameter is a list, it must be a list of objects of the selected Data Type.  | 
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 Select the data type from the Select Type dialog box. This is the type of value that the required parameter can have. For example, it can be a data type from the Monitoring data source, such as Host, or a common type like String.  | 
In the preceding example, the myKey node is the name of the list of objects of the data type Host. A query always returns a list of data objects of the given type. Even if there is only one data object to return, the query returns a list with one item.