The name of the system. This required string value corresponds to the System Name setting on the Client Configuration window (see Define the System Name and Type for a Client - System Connection).

The type of system to which the client will connect. This required string value matches the Type setting on the Geo SCADA Expert Client Configuration window. You can specify any of the following (enter the text on the left to specify the required connection type):

• SCX—To connect to a Geo SCADA Expert server
• OPCDA—To connect to an OPC Data server

For more information, see Define the System Name and Type for a Client - System Connection.

Defines whether the system is online (enabled) or offline (disabled). This optional Boolean value corresponds to the Disable setting on the Geo SCADA Expert Client Applet.

Defines whether the client connection can be detected by ViewX. In some circumstances, you may want the client connection to only be available to third-party OPC clients and not ViewX clients. This optional Boolean value corresponds to the Visible in ViewX setting on the Client Configuration window (see Define Whether the System is Visible in ViewX).

Defines whether the client uses client licensing. This optional Boolean value corresponds to the Use Client Licensing setting on the Geo SCADA Expert Client Configuration window. When it is true, client licensing is enabled; when it is false, client licensing is disabled. For more information, (see Enable or Disable Client Licensing).

This attribute is now obsolete. Do not use this attribute in new Systems.xml files. The attribute is supported for backward compatibility.

Defines whether the client connects to fully synchronized servers only. This optional Boolean value corresponds to the Connect to Fully Synchronized Server setting on the Client Configuration window (see Connect Client to Fully Synchronized Server Only).

If this attribute is omitted from the Systems.xml file, its default setting (false) is used.

Defines whether the client uses the IPv6 protocol for communications. This optional Boolean value corresponds to the Enable IPv6 setting on the Client Configuration window (see Enable or Disable IPv6 on the Client).

If this attribute is omitted from the Systems.xml file, its default setting (false) is used, meaning that the client communicates using the IPv4 protocol.

Defines whether the client is required to validate the server's certificate when a communications link is being established. This optional Boolean value corresponds to the Validate Server Certificate setting on the Connection Security window that is available from the Client Configuration window (see Configure the Client Connection Security Settings).

If this attribute is omitted from the Systems.xml file, its default setting (false) is used.

Defines the method by which a client certificate is selected when a communications link is being established. This optional attribute corresponds to the Client Certificate Mode and Client Certificate Selection settings on the Connection Security window that is available from the Client Configuration window (see Configure the Client Connection Security Settings). The possible options are:

• 0—Disabled. No certificate will be supplied to the server.
• 1—Automatic. If the server requests a certificate then one will be selected automatically, based on the CA root certificates that the server trusts.
• 2—Specified. If the server requests a certificate then one specified via the selectClientCertByHash or selectClientCertBySubjectSubstring attribute will be selected. If both attributes are present in the Systems.xml file then selectClientCertByHash will take precedence.

If this attribute is omitted from the Systems.xml file, its default setting (1) is used.

Optionally include either this attribute or the selectClientCertBySubjectSubstring attribute when the clientCertMode attribute is set to 2 (see above). The value of this attribute is a string. The string specifies the full hash string of the certificate that should be selected when establishing a communications link.

The value of this attribute is ignored if the clientCertMode attribute is set to a value other than 2, or is not included in the Systems.xml file.

Optionally include either this attribute or the selectClientCertByHash attribute when the clientCertMode attribute is set to 2 (see above). The value of this attribute is a string. The string specifies a portion of the subject name of the certificate that should be selected when establishing a communications link. If more than one certificate has a subject name that contains the string, a certificate will be selected based on the CA root certificates that the server trusts.

The value of this attribute is ignored if the clientCertMode attribute is set to a value other than 2, or is not included in the Systems.xml file.

The workstation name of the client. This optional string value corresponds to the Workstation Name setting on the Client Configuration window (see Define the Workstation Name for the ViewX Client).

Defines an order of preference for the client - server connection. This value of this optional attribute corresponds to the Default System Priority setting on the Client Configuration window (see Use System Priority for Global Scripts and Homepages).

This optional string allows you to define the name of the server node. This attribute corresponds to the Node Name setting (see Define the Node Name for a Client - System Connection).

This optional integer allows you to define the node cost (which is used by Geo SCADA Expert to determine the order of preference for the client’s connections). This attribute corresponds to the Node Cost setting (see Define the Node Cost for a Client - System Connection).

This optional integer allows you to define the number of the port that the client uses for outgoing communications to the system server. This attribute corresponds to the Port setting (see Define the Port and Poll Timeouts and Intervals for a ViewX Client Connection)

This optional Boolean allows you to define whether data compression is enabled (true) or disabled (false) for the client - system connection. This attribute corresponds to the Compress setting (see Define the Client Compression Settings for a ViewX Client Connection).

This optional integer allows you to define the amount of time, in milliseconds, in which the client can attempt to make a connection to the server. This attribute corresponds to the Connect Timeout setting (see Define the Port and Poll Timeouts and Intervals for a ViewX Client Connection).

This optional integer allows you to define the amount of time, in milliseconds, in which the client can request data from the server. This attribute corresponds to the Request Timeout setting (see Define the Port and Poll Timeouts and Intervals for a ViewX Client Connection).

This optional integer allows you to define the amount of time, in milliseconds, in which the client can attempt to terminate a connection to the server. This attribute corresponds to the Disconnect Timeout setting (see Define the Port and Poll Timeouts and Intervals for a ViewX Client Connection).

This optional integer allows you to define the amount of time, in seconds, that can elapse between each update request sent from the client to the server. This attribute corresponds to the Poll Interval setting (see Define the Port and Poll Timeouts and Intervals for a ViewX Client Connection).

This optional integer allows you to define the amount of time, in seconds, that the client will wait for a response to a poll request from the server. This attribute corresponds to the Poll Timeout setting (see Define the Port and Poll Timeouts and Intervals for a ViewX Client Connection).