Endnote Part
Endnote information in a WordprocessingML document is stored in the Endnotes part within the package, which is stored via an implicit relationship from the Main Document part or Glossary Document part of relationship type http://schemas.openxmlformats.org/wordprocessingml/2006/endnotes
and has a content type of vnd-openxmlformats.officedocument.wordprocessingml-endnotes+xml
.