This specification defines how a selection of existing HTTP fields can be handled as Structured Fields. About This Document This note is to be removed before publishing as an RFC. Status information for this document may be found at https://datatracker.ietf.org/doc/draft-nottingham-http-structure- retrofit/. information can be found at https://mnot.github.io/I-D/. Source for this draft and an issue tracker can be found at https://github.com/mnot/I-D/labels/http-structure-retrofit.