Metafacture was originally developed an maintained by Markus Geipel and Christoph Böhme at the German National Library (DNB). It's on GitHub since 2013, currently 18 contributors, 53 stars. Since 2019 Metafacture is maintained by Open Infrastructure, hbz NRW, with contributions from the community.
Metafacture is a toolkit for processing semi-structured data with a focus on library metadata. It provides a versatile set of tools for reading, writing and transforming data. Metafacture can be used as a stand-alone application or as a Java library in other applications. The name Metafacture is a portmanteau of the words meta data and manufacture.