Out of the box,
XMLmind XML
Editor (XXE for short) allows to edit topics, maps and bookmaps
conforming to the DITA 1.1 DTD or W3C XML Schema.
As of version 4.5, XXE no longer relies on the
DITA Open
Toolkit 
to convert DITA documents to formats such as XHTML, PDF,
RTF, etc. Instead XXE embeds
XMLmind DITA Converter:
XMLmind DITA Converter 
(ditac for short) allows to
convert the most complex DITA 1.1 documents to production-quality XHTML
1.0, XHTML 1.1, HTML 4.1,
Java™ Help, HTML Help,
Eclipse Help, EPUB, PDF, PostScript®, RTF (can be opened in Word 2000+),
WordprocessingML (can be opened in Word 2003+), Office Open XML
(
.docx, can be opened in Word 2007+), OpenOffice (
.odt,
can be opened in OpenOffice.org 2+).
All this makes XMLmind DITA Converter a very
serious alternative to using the
DITA Open
Toolkit 
.