The JDD provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge. This is identical to the Creative Commons Attribution-NonCommercial-NoDerivatives (CC-BY-NC-ND) License. https://creativecommons.org/licenses/by-nc-nd/4.0/

It is accessible without barrier from Korea Citation Index (https://kci.go.kr) or National Library of Korea (http://nl.go.kr) in the event a journal is no longer published. Authors can archive pre-print (i.e., pre-refereeing), and they can archive post-print (i.e., final draft post-refereeing). Authors can archive publisher’s version/PDF.

This CC-BY-NC-ND license means that anyone may freely read, download, distribute and make the article available to the public (in printed and electronic form), provided that the author and the journal as the source are acknowledged, whereas no commercial use is allowed and the work may not be altered, transformed or serve as the basis for a derivative work.