1. Döller, M., Tous, R., Gruhne, M., Yoon, K., Sano, M., Burnett, I.S.: The MPEG Query Format: On the way to unify the access to multimedia retrieval systems. IEEE Multimedia 15(4), 82–95 (2008)
2. Hanjalic, A., Lienhart, R., Ma, W.-Y., Smith, J.R.: The holy grail of multimedia information retrieval: So close or yet so far away? Proceedings of the IEEE 96, 541–547 (2008)
3. Stegmaier, F., Döller, M., Kosch, H., Hutter, A., Riegel, T.: AIR: Architecture for interoperable retrieval on distributed and heterogeneous multimedia repositories. In: 11th International Workshop on Image Analysis for Multimedia Interactive Services, WIAMIS 2010 (to appear, 2010)
4. Melton, J., Eisenberg, A.: SQL multimedia application packages (SQL/MM). ACM SIGMOD Record 30, 97–102 (2001)
5. Boag, S., Chamberlin, D., Fernández, M.F., Florescu, D., Robie, J., Siméon, J.: XQuery 1.0: An XML query language (2007),
http://www.w3.org/TR/xquery/