Metafacture is a toolkit for processing semi-structured data with a focus on library metadata. It provides tools for reading, writing and transforming data. Metafacture can be used as a stand-alone application or as a java library.

See the wiki for more information: https://github.com/culturegraph/metafacture-core/wiki
For support and discussion join the mailing list: http://lists.dnb.de/mailman/listinfo/metafacture