Editing DOS Navigator (section)

== Disadvantages ==
The original DN contains a large amount of [[Assembler (computing)|assembler]] code, complicating ports to other platforms. The cross-platform version, DN OSP, in turn, is tied to the [[Virtual Pascal]] [[compiler]] and [[runtime library]], which are no longer supported. No version of DN as of January 2022 supports [[Unicode]] on platforms other than Windows, although cross-platform implementation of [[Turbo Vision]] for Pascal with Unicode support exists.<ref name=":0">{{Cite web|lang=en|url=https://gitlab.com/freepascal.org/fpc/source/-/issues/21373|title=Free Vision for linux platform does not properly display the Russian language. (#21373) · Issues · FPC / FPC / FPC Source|website=GitLab|access-date=2022-02-07}}</ref> The source code license is compromised.

=== Source code license ===
DN source code was published under the 3-clause [[BSD license]]. However, the code included an implementation of the [[Turbo Vision]] library based on the version from the [[Turbo Pascal]] distribution, and the latter was never released under a license that allows creation of derivative works. In addition,  DN OSP contains modified parts of the [[Virtual Pascal]] runtime library, while the license for Virtual Pascal itself prohibits distribution of modified versions, however, it is not clear whether this applies only to the compiler or to the runtime library too.<ref>{{Cite web|url=https://github.com/unxed/dn2l|title = Dn2l|website = [[GitHub]]|date = 2 February 2022}}</ref>