2.1.7.8 Comments
An instance of the Comments part type specifies the comments for a given sheet, as well as the names of the authors of those comments.
Content type: application/vnd.ms-excel.comments
Source relationship: http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments
A package MUST contain at most one Comments part per worksheet (section 2.1.7.62) or macro sheet (section 2.1.7.32) part, and each such part MUST be the target of an implicit relationship from a worksheet or macro sheet part.
A Comments part MUST NOT have implicit or explicit relationships to any part specified by this document.
Record sequence ABNF:
COMMENTS = BrtBeginComments COMMENTAUTHORS COMMENTLIST *FRT BrtEndComments
COMMENTAUTHORS = BrtBeginCommentAuthors *BrtCommentAuthor BrtEndCommentAuthors
COMMENTLIST = BrtBeginCommentList *COMMENT BrtEndCommentList
COMMENT = [ACUID] BrtBeginComment [BrtCommentText] BrtEndComment
For ABNF rules not listed here, see section 2.1.8.