1. Available and useful: OAI at the Library of Congress;Arms;Library Hi Tech,2003
2. Burnard, L., Sperberg-McQueen C.M., 2012. TEI Lite: Encoding for Interchange: an introduction to the TEI Final revised edition for TEI P5. The TEI Consortium. .
3. Candela, P., 2003. W3C Glossary and Dictionary. .
4. Encoding controlled vocabularies for the Semantic Web using SKOS Core;Cantara;OCLC Syst. Serv.,2006
5. CCSDS, 2008. Recommended StandardBlue Book XML Formatted Data Unit (XFDU) Structure and Construction Rules. Consultative Committee for Space Data Systems (Recommendation for Space Data System Standards).