NeXML is a generative XML Schema with EMF Java bindings for the NeXus format. NeXML stands for "XML tools for NeXus", and is also the name of the automatically generated XML Schema for NeXus. NeXus is a common data format for neutron, x-ray, and muon science. It is being developed as an international standard by scientists and programmers representing major scientific facilities in Europe, Asia, Australia, and North America in order to facilitate greater cooperation in the analysis and visualization of neutron, x-ray, and muon data.