# Query Z39.50 Query Servers

After you enable federated search of a Z39.50 query server through the standard ACI (Autonomy Content Infrastructure), you can send `Query` actions in PQF or CQL format to the DAH. The DAH then passes the queries to the query servers it connects to.

You can use the following `Query` action parameters:

-     Text

-     MaxResults

-     DatabaseMatch

-     TotalResults

-     Start

For details on these settings, refer to the IDOL Server Reference.

## Example Queries

PQF:

    http://host:port/action=Query&Text=cat

    http://host:port/action=Query&Text="Abyssinian Bobtail"

    http://host:port/action=Query&Text=@and fat cat

    http://host:port/action=Query&Text=@attr 1=4 @attr4=1 "hot tin roof"

CQL:

    http://host:port/action=Query&Text=cat

    http://host:port/action=Query&Text="Abyssinian Bobtail"

    http://host:port/action=Query&Text=fat and cat

    http://host:port/action=Query&Text=title="hot tin roof"

where:

- `host` is the IP address (or host name) of the machine on which the DAH is installed.

- `port` is the port number that clients use to communicate with the DAH (you specify this option in the `Port` setting in the `[Server]` section of the DAH configuration file).

NOTE: PQF (Prefix Query Format) and CQL (Common Query Language) are non-IDOL syntax standards. For more information, refer to the external documentation.

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