انظر: Statistical Data and Metadata Exchange, 2008, SDMX Content-Oriented Guidelines, Annex 4, Metadata Common Vocabulary. وثيقة متاحة في العنوان التالي: 11http://www.sdmx.org/index.php?page_id=1
Statistical Data and Metadata Exchange, SDMX Content-Oriented Guidelines, Annex 4, Metadata Common Vocabulary, можно ознакомиться по адресу: http://www.sdmx.org/index.php?page_id=11.