Authoring formats 
  In addition to standard DITA XML, DITA-OT supports several alternative input formats, including Markdown
    and the proposed XDITA , MDITA  and HDITA  authoring formats currently in
    development for Lightweight DITA.
  
Standard DITA XML 4.3 , DITA-OT also provides an initial preview of features for the     latest draft of the upcoming DITA 2.0 standard.Markdown input Markdown  is a lightweight markup language that allows you to write using an easy-to-read plain text     format and convert to structurally valid markup as necessary.Preview support for Lightweight DITA Lightweight DITA , or “LwDITA ”. The XDITA , MDITA  and HDITA      formats are alternative representations of DITA content in XML, Markdown and HTML5.