Editing Microsoft OneNote (section)

== File format ==
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A OneNote notebook is stored as a folder with a separate [[data file]] for each section. OneNote files have a <code>.one</code> [[filename extension]].<ref name="doc1"/> A .one file can be a OneNote notebook or a OneNote section.

Microsoft upgraded the file format twice after it had introduced OneNote 2003 — first in OneNote 2007, then in OneNote 2010.<ref>{{cite web |title=Error message when you try to open a OneNote 2007 or 2010 file in OneNote 2003: "This section is from a later version of One Note and cannot be opened" (Revision 4.0) |url=http://support.microsoft.com/kb/916888 |work=Support |publisher=Microsoft |access-date=September 29, 2011 |date=September 12, 2011 |archive-date=September 29, 2011 |archive-url=https://web.archive.org/web/20110929153554/http://support.microsoft.com/kb/916888 |url-status=live }}</ref> OneNote 2003 files can be opened by both OneNote 2007 and OneNote 2010 in read-only mode and subsequently upgraded to the later versions of the file format.<ref>{{cite web |first=David |last=Rasmussen |url=http://blogs.msdn.com/david_rasmussen/archive/2006/10/08/Why-the-OneNote-2007-and-2003-file-format-are-different.aspx |title=Why the OneNote 2007 and 2003 file format are different |work=David Rasmussen's Blog |agency=[[MSDN Blogs]] |publisher=Microsoft |date=October 8, 2006 |access-date=September 2, 2011 |archive-date=January 23, 2010 |archive-url=https://web.archive.org/web/20100123185000/http://blogs.msdn.com/david_rasmussen/archive/2006/10/08/Why-the-OneNote-2007-and-2003-file-format-are-different.aspx |url-status=live }}</ref><ref name="about .one 2010">{{cite web |title=About file format changes in OneNote 2010 |url=http://office.microsoft.com/en-us/onenote-help/about-file-format-changes-in-onenote-2010-HA010386956.aspx |work=[[Microsoft Office website]] |publisher=Microsoft |access-date=September 29, 2011 |archive-date=November 16, 2011 |archive-url=https://web.archive.org/web/20111116181744/http://office.microsoft.com/en-us/onenote-help/about-file-format-changes-in-onenote-2010-HA010386956.aspx |url-status=live }}</ref> OneNote 2010 can read and write OneNote 2007 file formats. It can also convert back and forth between the 2010 and the 2007 formats.<ref name="about .one 2010" />

Microsoft has documented the OneNote file format. It is an [[open format]] that can store varied [[multimedia]] content in a single <code>.one</code> file.<ref name="doc1">{{cite web |title={{Bracket|MS-ONE}}: OneNote File Format Specification |url=https://learn.microsoft.com/en-us/openspecs/office_file_formats/ms-one/73d22548-a613-4350-8c23-07d15576be50 |publisher=Microsoft |access-date=December 7, 2022 |date=December 7, 2022 |archive-date=December 7, 2022 |archive-url=https://web.archive.org/web/20221207062145/https://learn.microsoft.com/en-us/openspecs/office_file_formats/ms-one/73d22548-a613-4350-8c23-07d15576be50 |url-status=live }}</ref><ref>{{cite web |title={{Bracket|MS-ONESTORE}}: OneNote Revision Store File Format Specification |url=http://msdn.microsoft.com/en-us/library/dd951288%28v=office.12%29.aspx |work=[[MSDN]] |publisher=Microsoft |access-date=September 29, 2011 |date=June 10, 2011 |archive-date=September 30, 2011 |archive-url=https://web.archive.org/web/20110930121608/http://msdn.microsoft.com/en-us/library/dd951288(v=office.12).aspx |url-status=live }}</ref><ref>{{cite web |title=OneNote 2010: XML Schema Definition (XSD) File |url=http://www.microsoft.com/download/en/details.aspx?&id=27396 |work=Download Center |publisher=Microsoft |access-date=September 29, 2011 |date=September 13, 2011 |archive-date=December 4, 2011 |archive-url=https://web.archive.org/web/20111204112437/http://www.microsoft.com/download/en/details.aspx?&id=27396 |url-status=live }}</ref>

Multiple .one files can be exported to a .onepkg file, which stores multiple .one files (corresponding to the individual notebooks) in [[cabinet (file format)|cabinet]] file format.