doi

type MapSniffer struct {
	Pattern    *regexp.Regexp
	IgnoreKeys []*regexp.Regexp
}

type Sniffer struct {
	Reader         io.Reader
	Writer         io.Writer
	MapSniffer     *MapSniffer
	IdentifierKey  string
	UpdateKey      string // if set, update the document in place
	SkipUnmatched  bool
	ForceOverwrite bool // if set, overwrite existing values in "UpdateKey"
	PostProcess    func(s string) string
	BatchSize      int
	NumWorkers     int
}