This is the source of the Nxt Reference Software (NRS) corresponding to version 0.4.7e, as provided by its original developer, BCNext. The Alias System has been removed from the source, as it is an advanced feature which will be open-sourced later. Only the core is made open source now. As of Jan 01, 2014, the Nxt blockchain has advanced past block 30000 and is now using Transparent Forging. The Transparent Forging is also considered an advanced feature and is not part of the open-source release yet. This means that clients running 0.4.7e, as provided here, will not be able to advance after block 30000 on the current blockchain.