DITA Open Toolkit has successfully used the DITA 1.3 Committee Specification 01 Part 3 (All Inclusive Edition), approved 21 August 2015, in accordance with section 4.1, "Conformance of DITA implementations," section 4.2, "Conformance of DITA documents", and section 4.3, "Conformance of DITA processors". DITA-OT is a "Fully aware processor" under the definition in section 4.3; DITA-OT interoperates with multiple independent implementations. Among others, DITA-OT implements the following structures and features added to DITA 1.3: XML mention domain Branch filtering Key scopes Same-topic fragment identifiers Robert D Anderson IBM Authoring Tools Development Chief Architect, DITA Open Toolkit (
http://www.dita-ot.org/ )