GeodesyML is an initiative of Australian and NZ government geodetic agencies in collaboration with international GNSS organisations.
Just like other Markup Languages, GeodesyML is a common language for sharing data and metadata. In this case, the language of geodesy. Where databases are mapped to GEodesyML they can easily be shared and combined with others.
Want to know more? Visit the GeodesyML website http://geodesyml.org/geodesyml-information/.