Released: Apr 22, 2026

Updates in V28.1 Build ID: 2026041800

Features

• Component Update: Updated the Netty HTTP library used in the Oxygen Publishing Engine Zendesk plugin to version 4.2.12.Final.
• WebHelp Responsive: WebHelp Responsive output generation is now more robust when enabling the webhelp.enable.ai.friendly parameter.
• WebHelp Context Sensitive Help: New optimizations allow you to get faster load times when using WebHelp context-sensitive help.

Released: Mar 18, 2026

Updates in V28.1

Features

WebHelp Output

• Generate Output Files for Content Located Outside DITA Map Folder - The generate.copy.outer parameter can now be used in WebHelp Responsive transformations to generate output files for resources that are located outside the DITA map folder.

PDF Output

• Character-Level Fallback Fonts - For DITA to PDF publishing, you can now use the new enable.character.level.font.fallback parameter to enable character-level font fallbacks so that mixed-language content (for example, Latin...

Released: Feb 3, 2026

Updates in V28.0 Build ID: 2026013010

Features

• Oxygen PDF Chemistry: Improved the line break algorithm, especially for non-Latin punctuation marks (such as ideographic characters).

Fixes

• Oxygen PDF Chemistry: Fixed an issue where resetting a background image using "background-image: none;" caused an "image not found" error.
• WebHelp Context-Sensitive Help: Resolved encoding issues for non-Latin file names in context-sensitive help mappings, ensuring that targets are correctly identified and matched regardless of character set...

Released: Dec 17, 2025

Updates in V28.0 Build ID: 2025121623

Fixes

• Oxygen PDF Chemistry: Fixed exception appearing when processing footnotes in rotated table cells.
• Oxygen PDF Chemistry: Fixed Matterhorn 11-001 "Note without ID" issue, improving overall PDF/UA-1 accessibility in PDF outputs.
• WebHelp search: Fixed the "stemmer is not a function" error triggered when the use.stemming parameter is enabled in WebHelp Responsive output.

Released: Nov 26, 2025

Updates in V28.0

Features

WebHelp Output

• Sticky Table Headers - Table headers can now be set to stay visible as you scroll, allowing you to maintain context while viewing information. This behavior can be controlled using the new webhelp.enable.sticky.table.headers transformation parameter.
• Switch Between Light and Dark Theme - You can now let users switch between Light and Dark themes in WebHelp output by enabling the webhelp.enable.dark.mode parameter. When enabled, a Switch Theme button appears in the header...

Released: Jul 1, 2025

Updates in V27.1 Build ID: 2025063009

Features

• Component update: Updated Apache Commons Compress to 1.26.0.

Fixes

• PDF using HTML5 & CSS: Fixed a display issue that caused notes to appear in two lines rather than a single line.
• WebHelp Responsive: Ensure expand/collapse buttons are correctly displayed when table of contents are not sticky in a topic.
• WebHelp Responsive: Resolved issues regarding the 16:9 aspect ratio and responsive rendering of video elements in the output.

Released: Apr 15, 2025

Updates in V27.1 Build ID: 2025041503

Fixes

• PDF Publishing / Appendix Numbering: Fixed the numbering of <appendix> children for deep numbering schemes.
• Oxygen PDF Chemistry / Lists: Fixed an issue where styling properties (such as 'font-size') were not properly applied to markers in lists with list-style-position: inside.

Released: Mar 28, 2025

Updates in V27.1 Build ID: 2025032808

Fixes

• Oxygen Publishing Engine: Fixed the wildcard expansion for libraries when installing/removing plugins.

Released: Mar 24, 2025

Updates in V27.1

Features

PDF Output

• Control Logging - It is now possible to control the Chemistry console logging by using a custom logback.xml configuration file along with the new chemistry.log.file transformation parameter. This is helpful if you want to hide the INFO messages or write the logs into a separate file.

DITA-OT

• The publishing engine has been updated to integrate DITA-OT 4.3.0.

Component Updates

• Oxygen WebHelp Responsive output now uses Bootstrap 5.3.3 to render the output.

Deprecated/Removed...

Released: Dec 16, 2024

Updates in V27.0 Build ID: 2024121223

Features

• WebHelp tabs: Changed the default display of the elements marked with outputclass="wh-tabbed" attribute.

Fixes

• Publishing / PDF Appendix Numbering: Fixed the numbering of <appendix> children for deep numbering schemes.
• Oxygen PDF Chemistry: Removed the extra table caption and header from the page footer when tables are displayed on multiple pages.