Migrating to release 4.3
DITA-OT 4.3 includes new init and validate subcommands that can be used to set up projects from a template and check files for errors before publishing. You can now publish multiple formats on the command line at once, add raw DITA to Markdown files, and publish bookmaps with PDF themes.
Bookmap support in PDF themes
com.elovirta.pdf has been updated to version 0.8 for better bookmap support.
        #111
        You can now style the following bookmap elements in a YAML or JSON theme without building a custom PDF plug-in:
        - <part>
- <chapter>
- <appendix>
- <index>
Table of contents (ToC) styles have moved to the root style key. ToC styling has also been
        extended for better bookmap support, so you can now specify styles for each level with dedicated keys such as
          style-toc-part, style-toc-chapter, etc.
Parts and chapters now also support their own local contents listings, which you can enable by setting the
        corresponding layout key, for example chapter-layout: MINITOC. You can then define styling for
        each level via keys like style-part-toc-chapter, or style-chapter-toc-1.
A new default theme provides basic styling such as font settings, indentation, and title
        numbering for a range of commonly used elements. This theme is not intended for publishing as is, but can serve
        as a foundation for custom themes, and reduce the number of elements you need to style yourself. To use the
        default theme as the baseline for your own custom theme, add extends: default to your theme
        file.
        #112,
        #114
      
Legacy sample files removed
dita init samples path/to/dita-ot-dir/docsrc/samples