ActionScript | Flex | Flash bracketed directives like [SWF...] and [Frame...], what are they? documentation?

I've seen that this kind of directives like [SWF...] and [Frame...] are used to开发者_StackOverflow中文版 set things that would otherwise require using the Flash IDE, but this way you set them from within Actionscript code.

I've tried to search for them but as I don't know their name I can't find them, and of course SWF and Frame aren't good search terms.

Where are they documented?

thanks.

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Metadata tags.

http://livedocs.adobe.com/flex/3/html/help.html?content=metadata_3.html