In open-fl samples like pirate-pig, most of the packages being used are having root as flash eg.
flash.display.MovieClip
flash.events.Event etc.
While when i see a port of away3d into haxe, eg. View3d.hx , they use openfl package as root eg.
openfl.display.Sprite
openfl.events.Event
So, what is the difference ? Can they be used interchangeably ?
Maybe this needs to go in an FAQ, because it keeps coming up.
Short answer: they can usually be used interchangeably, but openfl
is preferred.
This was made consistent a while ago:
https://github.com/openfl/openfl-samples/blob/master/PiratePig/Source/piratepig/PiratePig.hx
Originally, OpenFL favored the flash
namespace, but a while ago (when OpenFL 2 was released, I believe) it was changed to favor the openfl
namespace instead. It’s still backward compatible, but this allows for cleaner/better code completion, better consistency across all targets and better clarity about what you are using, and what features are available 
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