Microsoft announced On the inclusion in Microsoft Office 2021 and Microsoft 365 Office 2021 Support Support Specifications ODF 1.3 (OpenDocument), which is available in Word, Excel and PowerPoint applications. Previously, the ability to work with documents in ODF 1.3 format was available only in LibreOffice 7.x, and MS Office was limited to supporting ODF 1.2 specification. From now on, MS Office allows you to work with the topical version of the ODF format, which is proposed along with the support of OOXML’s own format (Office Open XML), used in files with .docx, .xlsx and .pptx extensions. When exporting to ODF, documents are stored only in ODF 1.3 format, but old alternative office packages will be able to process data files, ignoring specific for ODF 1.3 innovations.
ODF 1.3 format is notable for adding new features to ensure document protection, such as the certification of the document digital signature and encrypt the content using OpenPGP keys. The new version also added support for the types of polynomial and moving average regression for graphs, additional methods of formatting numbers are implemented in numbers, added a separate type of upper and lower footers for the title page, the means of arrangement of the parameters of paragraphs are defined depending on the context, improved monitoring of changes in the document and Added new template type for basic text in documents.