We appeal from Flex to symbols through CSS

Curious is the fact that symbols from swf in CSS can be accessed via #

Application {
backgroundImage: Embed (source = "assets / backgrounds.swf # tartan");
}

At the same time, backgrounds.swf is compiled in Flash CS4, and tartan is its symbol.
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In fact, this is an analogue of this:
Application {
backgroundImage: Embed (source = "assets / backgrounds.swf", symbol = "tartan");
}

Just an interesting fact.
An interesting link can be found here:
Flex2 Style Explorer