The NationStates Archive is an (unofficial) archive of NationStates game content.
Regional Archives consist of "Region Dumps", which are a large gzipped archives containing a single region XML file. The XML contains details on all currently active regions in the game, and is generated daily.
National Archives consist of "Nation Dumps", which are large gzipped archives containing a single nation XML file. The XML contains details on all currently alive nations in the game, and is generated daily.
NS-DUMPS is a Java application which can convert Nation or Region dumps into a SQL Database for easier access. By default, it creates an in-memory H2 Database, but can be extended to write to any standard SQL database desired.