适用于 Windows 事件的 XML Xpath？

Question

我正在尝试根据以下事件 XML（示例）创建一个事件过滤器，但似乎缺少了一些东西：

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<Events><Event xmlns='http://schemas.microsoft.com/win/2004/08/events/event'>
    <System>
        <Provider Name='acvpnui'/>
        <EventID Qualifiers='25600'>3021</EventID>
        <Level>4</Level>
        <Task>0</Task>
        <Keywords>0x80000000000000</Keywords>
        <TimeCreated SystemTime='2016-04-08T22:01:57.000000000Z'/>
        <EventRecordID>35164</EventRecordID>
        <Channel>Cisco AnyConnect Secure Mobility Client</Channel>
        <Computer>MyComputerName.domain.com</Computer>
        <Security/>
    </System>
    <EventData>
        <Data>Message type information sent to the user:
Connected to my.vpn.server.com.</Data>
    </EventData>
</Event></Events>

我正在使用以下 XML XPath 过滤器，但没有得到任何结果：

<QueryList>
  <Query Id="0" Path="Cisco AnyConnect Secure Mobility Client">
    <Select Path="Cisco AnyConnect Secure Mobility Client">
Event
    [System
        [Provider
            [@Name='acvpnui'] and (EventID=3021)
        ]
    ]
    [EventData
        [Data and (Data='Message type information sent to the user: Connected to my.vpn.server.com.')]
    ]
    </Select>
  </Query>
</QueryList>

我可以取出and (Data='Message type information sent to the user: Connected to my.vpn.server.com.')]，但这样一来，过滤器会给出比我想要的更多的结果。如何过滤特定的 EventData？