With the release of version 9.2 in August 2009, the packaging changed to create three versions: home edition (HE), professional edition (PE), and enterprise edition (EE). The home edition is open source and free, the other versions are available under commercial licenses. The renaming from SA to EE was done to emphasize that the commercial product by now included many additional features beyond schema awareness, including a more advanced optimizer and the capability for streamed processing of XSLT and XQuery, enabling very large source documents to be processed without correspondingly large amounts of memory.