The adobe flex has the library file called as SWC. This is a simples zip file with the extension change.
More details: http://livedocs.adobe.com/flex/2/docs/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Parts&file=00001518.html
I need to unpack this files to use the RSL functionality.
Attached a simple SWC from the flex sdk 3.0
U can open this with any unzipper (winzip, winrar, or similar)