The keep node

Keep only those fields and tags specified by the parameters.

Example

|keep('data.topic', 'data.temperature')
.as('topic', 'temperature')

Parameters

Parameter	Description	Default
[node] fields( string_list )	list of fieldnames to keep from the incoming data
tags( string_list )	list of tagnames to keep from the incoming data	[]
as( string_list)	list of new field names for the kept fields, if given, must have the same count of names as fields	[]