On 18 December 2015, the Central Bank published various materials relating to National Specific Templates (NSTs) (i.e. reporting formats to be used for reporting to the Central Bank under Solvency II). These were published for public comment. The materials relate primarily to XBRL Taxonomy and Data Processing Models (in short, the reporting classification language and specifications to be used for such reporting). The Central Bank's proposed versions extend those previously published by the European Insurance and Occupational Pensions Authority (EIOPA). Central Bank extensions are generally prefixed with 'ie'.