XMLmind DITA Converter fully supports
Lightweight DITA 
(AKA LwDITA) support, whether
XDITA 
(very small subset of DITA XML, plus new
<audio>
and
<video>
elements),
HDITA 
(topics and maps written in
HTML5 
) or
MDITA 
Extended Profile (topics and maps written in
Markdown 
).
XMLmind DITA Converter can of course process DITA documents comprising
a mix of XDITA, HDITA, MDITA and (full) DITA topics and
maps.
You'll find in the following sections some templates to start writing
topics and maps in XDITA, HDITA and MDITA. You'll also find the list of
HDITA and MDITA implementation specificities and limitations.