PlantUML

PlantUML is a text-based format to describe data to be charted in a diagram. For some unknown reason, the U.S. National Archives decided to release a list of Japanese-Americans interned during World War II in this format instead of something more appropriate for this sort of data; others have converted it to more useful formats.

Documentation

 * Language reference guide

Sample data

 * Japanese internment data in U.S. National Archives

Other links

 * Official site