« A pure AS3 project uses only ActionScript and does not use the Flex framework in any way but still uses mxmlc, the Flex compiler, to create the final swf. «
« There is no data-binding, layout manager or mxml and it generally takes a lot more effort to make a polished app. »
http://www.randytroppmann.com/2011/04/12/pure-as3-workflow-with-flex-builder-…
