客户端可以从TopicProperties订阅指定的通知信息。下面的XML示例显示了设备规则引擎订阅所产生的通知。客户端只对引用名为VideoAnalyticsConfiguration、值为"2"和名为VideoSourceConfiguration、值为"1"的通知起反应。此订阅有一分钟超时。如果订阅没有明确续订或者不定期拉取消息，那么它将在此时间后自动终止。
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope"
xmlns:wsa="http://www.w3.org/2005/08/addressing"
xmlns:wsnt="http://docs.oasis-open.org/wsn/b-2"
xmlns:tet="http://www.onvif.org/ver10/events/wsdl"
xmlns:tns1="http://www.onvif.org/ver10/topics">
<SOAP-ENV:Header>
<wsa:Action>
http://www.onvif.org/ver10/events/wsdl/EventPortType/CreatePullPointSubscriptionRequest
</wsa:Action>
</SOAP-ENV:Header>
<SOAP-ENV:Body>
<tet:CreatePullPointSubscription>
<tet:Filter>
<wsnt:TopicExpression Dialect="http://www.onvif.org/ver10/tev/topicExpression/ConcreteSet">
tns1:RuleEngine//.
</wsnt:TopicExpression>
<wsnt:MessageContent Dialect="http://www.onvif.org/ver10/te v/messageContentFilter/ItemFilter">
boolean(//tt:SimpleItem[@Name="VideoAnalyticsConfigurationToken" and @Value="2"]) and boolean(//tt:SimpleItem[@Name="VideoSourceConfigurationToken" and @Value="1"])
</wsnt:MessageContent>
</tet:Filter>
<tet:InitialTerminationTime>
PT1M
</tet:InitialTerminationTime>
</tet:CreatePullPointSubscription>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>