elasticsearch-js/docs/reference/api/IngestDissectProcessor.md

IngestDissectProcessor [interface-IngestDissectProcessor]

Name	Type	Description
append_separator	string	The character(s) that separate the appended fields.
field	Field	The field to dissect.
ignore_missing	boolean	If true and field does not exist or is null, the processor quietly exits without modifying the document.
pattern	string	The pattern to apply to the field.