Variable: rmail-summary-message-parents-vector
rmail-summary-message-parents-vector is a variable defined in
rmailsum.el.gz.
Value
nil
Documentation
Vector that holds a list of indices of parents for each message.
Message A is parent of message B if the id of A appears in the
"References" or "In-reply-to" fields of B, or if A is the first
message with the same "Subject" as B. First element is ignored.
Source Code
;; Defined in /usr/src/emacs/lisp/mail/rmailsum.el.gz
(defvar rmail-summary-message-parents-vector nil
"Vector that holds a list of indices of parents for each message.
Message A is parent of message B if the id of A appears in the
\"References\" or \"In-reply-to\" fields of B, or if A is the first
message with the same \"Subject\" as B. First element is ignored.")