CDR file format is a proprietary file format
developed by Corel Corporation and primarily used for vector graphic
drawings. There is no publicly available CDR file format specification.[30][31]
Other CorelDRAW file formats include CorelDRAW Compressed (CDX), CorelDRAW Template (CDT)[29] and Corel Presentation Exchange (CMX).[32]
In December 2006 the sK1 open source project team started to reverse-engineer the CDR format.[33]
The results and the first working snapshot of the CDR importer were
presented at the Libre Graphics Meeting 2007 conference taking place in
May 2007 in Montreal (Canada).[34] Later on the team parsed the structure of other Corel formats with the help of the open source CDR Explorer.[35]
As of 2008, the sK1 project claims to have the best import support for
CorelDRAW file formats among open source software programs. The sK1
project developed also the UniConvertor, a command line open source tool
which supports conversion from CorelDRAW ver.7-X4 formats
(CDR/CDT/CCX/CDRX/CMX) to other formats. UniConvertor is also used in Inkscape and Scribus open source projects as an external tool for CorelDRAW files importing.[36][37][38]
In 2007, Microsoft blocked CDR file format in Microsoft Office 2003 with the release of Service Pack 3 for Office 2003.[39][40]
Microsoft later apologized for inaccurately blaming the CDR file format
and other formats for security problems in Microsoft Office and
released some tools for solving this problem.[41]
In 2012 the joint LibreOffice/re-lab team implemented libcdr, a
library for reading CDR files from v1 to the currently latest X6 version
and CMX files.[42]
The library has extensive support for shapes and their properties,
including support for color management and spot colors, and has a basic
support for text.[43]
The library provides a built-in converter to SVG, and a converter to
OpenDocument is provided by writerperfect package. The libcdr library is
expected to be used in LibreOffice 3.6[44], and thanks to public API it can be freely used by other applications.
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