Project Structure:
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The Parent pom is more like an aggregator but contains an assembly for the JBAS legacy integration (combines the jars of the Authorization SPI and the SPI Bare).

Modules:
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1) authorization - This is the submodule that defines the SPI that is used by both the JBossSX implementation as well as the ACL implementation. This Authorization SPI should be droppable in JBoss AS 4.2.x
2) spi - this is the sub module that defines the SPI excluding the authorization SPI.
