1. S. Abiteboul, P. Buneman, and D. Suciu. Data on the Web: From Relations to Semistructured Data and XML. Morgan Kaufmann, 1999.
2. Guruduth Banavar, Tushar Deepak Chandra, Bodhi Mukherjee, Jay Nagarajarao, Robert E. Strom, and Daniel C. Sturman. An efficient multicast protocol for content-based publish-subscribe systems. In Proc. of International Conference on Distributed Computing Systems, pages 262–272, 1999.
3. Robert Baumgartner, Sergio Flesca, and Georg Gottlob. Visual web information extraction with Lixto. In Procs. of 27th International Conference on Very Large Data Bases (VLDB), Roma, Italy, 2001. to appear.
4. Angela Bonifati and Stefano Ceri. Comparative analysis of five XML query languages. SIGMOD Record, 29(1):68–79, 2000.
5. T. Bray, J. Paoli, C. Sperberg-MacQueen, and E. Maler. Extensible Markup Language (xml) 1.0 (Second Edition), 2000.