{
	"display": string,
	"contentMetadata": [{
		"fieldName":string,// Any string, the key for generated array in "doc.metadata"
		"scriptlang":string,// One of "javascript", "regex", "xpath"
		"script":string,// The script that will generate the array in "doc.metadata" (under fieldName)
		"flags":flags,// Standard Java regex field (regex/xpath only), plus "H" to decode HTML, "D": will allow duplicate strings (by default they are de-duplicated), plus the following custom flags:
								// For javascript (defaults to "t" if none specified), "t" the script receives the doc fullText ("text"), "d" the script receives the entire doc (_doc), "m" the script receives the doc.metadata (_metadata)
								// For xpath: "o": if the XPath expression points to an HTML (/XML) object, then this object is converted to JSON and stored as an object in the corresponding metadata field array. (Can also be done via the deprecated "groupNum":-1)
		"replace":string,// Replacement string for regex/xpath+regex matches, can include capturing groups as $1 etc
		"store":Boolean,// Whether this field should be stored in the DB or discarded after the harvest processing
		"index":Boolean,// Whether this field should be full-text indexed or just stored in the DB
	},
	...
	]
}