+(defun mime-entity-children (entity)
+ (or (mime-entity-children-internal entity)
+ (mime-entity-send entity 'entity-children)))
+
+(defalias 'mime-entity-node-id 'mime-entity-node-id-internal)
+
+(defun mime-entity-number (entity)
+ "Return entity-number of ENTITY."
+ (reverse (mime-entity-node-id-internal entity)))
+
+(defun mime-find-entity-from-number (entity-number &optional message)
+ "Return entity from ENTITY-NUMBER in MESSAGE.
+If MESSAGE is not specified, `mime-message-structure' is used."
+ (or message
+ (setq message mime-message-structure))
+ (let ((sn (car entity-number)))
+ (if (null sn)
+ message
+ (let ((rc (nth sn (mime-entity-children message))))
+ (if rc
+ (mime-find-entity-from-number (cdr entity-number) rc)
+ ))
+ )))
+
+(defun mime-find-entity-from-node-id (entity-node-id &optional message)
+ "Return entity from ENTITY-NODE-ID in MESSAGE.
+If MESSAGE is not specified, `mime-message-structure' is used."
+ (mime-find-entity-from-number (reverse entity-node-id) message))
+
+(defun mime-entity-parent (entity &optional message)
+ "Return mother entity of ENTITY.
+If MESSAGE is specified, it is regarded as root entity."
+ (if (equal entity message)
+ nil
+ (mime-entity-parent-internal entity)))
+
+(defun mime-root-entity-p (entity &optional message)
+ "Return t if ENTITY is root-entity (message).
+If MESSAGE is specified, it is regarded as root entity."
+ (null (mime-entity-parent entity message)))
+
+
+;;; @ Entity Buffer
+;;;
+
+(defun mime-entity-buffer (entity)
+ (or (mime-entity-buffer-internal entity)
+ (mime-entity-send entity 'entity-buffer)))
+
+(mm-define-generic entity-point-min (entity)
+ "Return the start point of ENTITY in the buffer which contains ENTITY.")
+
+(mm-define-generic entity-point-max (entity)
+ "Return the end point of ENTITY in the buffer which contains ENTITY.")
+
+(defun mime-entity-header-start (entity)
+ (or (mime-entity-header-start-internal entity)
+ (mime-entity-send entity 'entity-header-start)))
+
+(defun mime-entity-header-end (entity)
+ (or (mime-entity-header-end-internal entity)
+ (mime-entity-send entity 'entity-header-end)))
+
+(defun mime-entity-body-start (entity)
+ (or (mime-entity-body-start-internal entity)
+ (mime-entity-send entity 'entity-body-start)))
+
+(defun mime-entity-body-end (entity)
+ (or (mime-entity-body-end-internal entity)
+ (mime-entity-send entity 'entity-body-end)))
+
+
+;;; @ Entity Header
+;;;
+
+(defun mime-fetch-field (field-name &optional entity)