Freshmeat page: http://freshmeat.net/projects/mondrian/
Mondrian is an OLAP (online analytical processing) database written in Java. It implements the MDX language; and we are adding support for JOLAP and XML for Analysis. It reads from SQL and other data sources, and aggregates data in a memory cache.
License: Common Public License
This project has the following developers:
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!