is swf open format

[Naveen Kumar]

Hi,
   Can we use .swf files to develop open source applications? Some of the links, that
maybe useful here:

http://www.adobe.com/devnet/swf/
http://www.adobe.com/devnet/swf/pdf/swf_file_format_spec_v10.pdf
http://opensource.adobe.com/wiki/display/flexsdk/Flex+SDK

regards
Naveen