D.2. The Statistical Data and Metadata Exchange content-oriented guidelines on metadata of Eurostat
18.35. On the basis of SDMX information, model DSDs can be created for data on the international supply of services (including FATS). The SDMX content-oriented guidelines have been used to define reference metadata for the European Statistical System (ESS). Table 18.1 lists the main components of the ESS reference metadata. The present Guide advises compilers of statistics on the international supply of services of other regions to take the European Union recommendations into account, as applicable, when setting up the conceptual structure of their own reference metadata for such statistics.
 Available from http://ec.europa.eu/eurostat/data/metadata/metadata-structure.
 See also the Commission of the European Communities recommendation 2009/498/EC of 23 June 2009 on reference metadata for the European Statistical System (Official Journal of the European Union, L 168,30.6.2009).