1Danish Library of Congress' Network Development and MARC Standards Offlce. ISO/CD25577 Information and documentation MarcXchange [S/OL]2006- 10 - 30 [2007 - 01 - 15 ]. http://www. bs.dk/MarcXchange/index.htm.
2Danish Library of Congress' Network Development and MARC Standards Office. MARCXML MARC 21 XML Schema[ EB/OL] (2006 - 7 - 26) [ 2007 -01 - 15 ] http://www. loc. gov/standards/marcxml/.