Reference The Reference topics provide more advanced information about the DITA-OT architecture, OASIS specification support, and licensing. DITA Open Toolkit ArchitectureDITA Open Toolkit is an open-source implementation of the OASIS specification for the Darwin Information Typing Architecture. The toolkit uses Ant, XSLT, and Java to transform DITA content (maps and topics) into different deliverable formats.DITA specification supportDITA Open Toolkit 3.3 supports all versions of the OASIS DITA specification, including 1.0, 1.1, 1.2, and 1.3.License Information DITA Open Toolkit is released under the Apache License, Version 2.0.