Thank you again for your response. I guess I am not understanding how to use the useragent filter. Sorry to ask again. I really want to understand how this filter works.
My Apache Access Logs are using the CombinedApacheFileFormat. One of the fields that is captured is named "agent". How do I use the useragent filter to parse out the browser name from the agent field and put the browser name value inside a new field named "browser-name"?