*Proceedings* Accepted papers after proper registration and presentation will be published in the International Conference Proceedings Series by ACM (ISBN: 978-1-4503-8930-3), which will be archived in the ACM Digital Library, and indexed Ei Compendex, Scopus, etc. -DSDE 2019 conference proceedings (ISBN: 978-1-4503-7216-9) has been indexed by Ei Compendex and Scopus. -Submit paper via online system: http://confsys.iconf.org/submission/dsde2021 More detail about submission, please visit at http://dsde.org/Submission.html.