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 Navigation Timing1 Content Delivery Time  | 
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 Navigation Timing1 Page Completion Time  | 
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 Fixed values—You can replace the value of a custom field with a new value or increment/decrement an existing value.  | 
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 Script outputs—Analyzers can use any data that is exposed as an output variable by a Groovy script. The script is executed as needed.  | 
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 Session custom fields—Analyzers can update custom fields using the data from a session-scoped custom field.  | 
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 Details—Analyzers can update custom fields using data that is already associated with a hit, sequence, or session. For example, you can update a custom field with a Request Header value. The type of details available to an analyzer changes depending on the type of analyzer.  |