If enabled, metadata fields from child documents are prefixed with the string CHILD. This differentiates them from the same field from the parent document. For example, if the author of an XML document (parent document) is Admin, and the author of an attached PDF document (child document) is JSmith, the names are extracted as author=Admin and CHILDauthor=JSmith.
If a parent document has multiple children, the CHILDfieldname field only stores the value from the child document that was extracted last.
Note: To keep parent metadata, you must enable the ImportMetaToFields parameter.