Abstract
Given the fact that relational and object-relational databases are the most widely used technology for storing data and that XML is the standard format used in electronic data interchange, the process of converting relational data to XML documents is one that occurs frequently. The problem that we address in this paper is an important one related to this process. If we convert a relation to an XML document, under what circumstances is the XML document redundancy free? Drawing on some previous work by the authors that formally defined functional dependencies and redundancy in XML documents, we show that for a very general class of mappings from a relation to an XML document, the XML document is always redundancy free if and only if the relation is in Boyce-Codd normal form (BCNF).
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References
Abiteboul, S., Buneman, P., Suciu, D.: Data on the Web. Morgan Kaufmann, San Francisco (2000)
Mokan, W.Y., Ng, Y.K., Embley, D.: A normal form for precisely characterizing redundancy in nested relations. ACM Transactions on Database Systems 21(1), 77–106 (1996)
Arenas, M., Libkin, L.: A normal form for xml documents. In: Proc. ACM PODS Conference, pp. 85–96 (2002)
Atzeni, P., DeAntonellis, V.: Foundations of databases. Benjamin Cummings (1993)
Bray, T., Paoli, J., Sperberg-McQueen, C.M.: Extensible markup language (xml) 1.0. Technical report (1998), http://www.w3.org/Tr/1998/REC-xml-19980819
Buneman, P., Davidson, S., Fan, W., Hara, C.: Reasoning about keys for xml. In: International Workshop on Database Programming Languages (2001)
Codd, E.F.: Recent investigations in relational database systems. In: IFIP Conference, pp. 1017–1021 (1974)
Levene, M., Vincent, M.W.: Justification for inclusion dependency normal form. IEEE Transactions on Knowledge and Data Engineering 12, 281–291 (2000)
Thomas, S.J., Fischer, P.C.: Nested relational structures. In: Kanellakis, P. (ed.) The theory of databases, pp. 269–307. JAI Press, Greenwich (1986)
Vincent, M.W.: A new redundancy free normal form for relational database design. In: Thalheim, B., Libkin, L. (eds.) Database Semantics, pp. 247–264. Springer, Heidelberg (1998)
Vincent, M.W.: Semantic foundations of 4nf in relational database design. Acta Informatica 36, 1–41 (1999)
Vincent, M.W., Liu, J.: Strong functional dependencies and a redundancy free normal form for xml. Submitted for publication (2002)
Vincent, M.W., Liu, J.: Functional dependencies for xml. In: Fifth Asian Pacific Web Conference (2003)
Widom, J.: Data management for xml - research directions. IEEE data Engineering Bulletin 22(3), 44–52 (1999)
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Vincent, M.W., Liu, J., Liu, C. (2003). Redundancy Free Mappings from Relations to XML. In: Dong, G., Tang, C., Wang, W. (eds) Advances in Web-Age Information Management. WAIM 2003. Lecture Notes in Computer Science, vol 2762. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45160-0_7
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DOI: https://doi.org/10.1007/978-3-540-45160-0_7
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