1. Aberer, K., Catarci, T., Cudré-Mauroux, P., Dillon, T., Grimm, S., Hacid, M.-S., Illarramendi, A., Jarrar, M., Kashyap, V., Mecella, M., Mena, E., Scannapieco, M., Saltor, F., Santis, L.D., Spaccapietra, S., Staab, S., Studer, R., Troyer, O.D.: Emergent semantics systems. In: In International Conference on Semantics of a Networked World (ICSNW), pp. 14–43 (2004)
2. Abiteboul, S., Buneman, P., Suciu, D.: Data on the Web: From Relations to Semistructured Data and XML. Morgan Kaufmann, San Mateo (1999).
3. Abiteboul, S., Quass, D., McHugh, J., Widom, J., Wiener, J.L.: The lorel query language for semistructured data. Int. J. Digit. Libr. 1(1), 68–88 (1997)
4. Abrial, J.-R.: Data semantics. In: Klimbie, J.W., Koffeman, K.L. (eds.) Data Base Management, pp. 1–60. North-Holland, Amsterdam (1974)
5. ANSI/X3/SPARC Study Group on Data Base Management Systems: Interim report. FDT—Bulletin of ACM SIGMOD 7(2), 1–140 (1975)