Abstract
Evidence grows that ORM has some problems to overcome in order to escape the charge that it cannot reliably lead, as claimed, to ONF (optimal normal form) relational schemas. Some of that evidence we present here. We also indicate that there is more than one way to address the issue effectively, thus saving ORM’s reputation as a generator of fully normalized relational schemas. But of two ways mentioned, the more satisfactory one involves, essentially, ascribing a certain semantics to the idea of “role-playing” in ORM. We show how it would address these issues, and why it is the better approach.
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References
Carver, A.: How To Avoid Redundant Object-References. In: Meersman, R., Herrero, P. (eds.) OTM-WS 2008. LNCS, vol. 5333, pp. 770–779. Springer, Heidelberg (2008)
Carver, A., Halpin, T.: Atomicity and Semantic Normalization. International Journal of Information System Modeling and Design 1(2), 23–39 (2010)
Halpin, T.: What is an Elementary Fact? In: Nijssen, G.M., Sharp, J. (eds.) Proc. 1st NIAM-ISDM Conf. (1993)
Halpin, T., Carver, A., Owen, K.M.: Reduction Transformations in ORM. In: Meersman, R., Herrero, P. (eds.) OTM-WS 2007, Part I. LNCS, vol. 4805, pp. 699–708. Springer, Heidelberg (2007)
Halpin, T., Morgan, T.: Information Modeling and Relational Databases, 2nd edn. Morgan Kaufmann Publishers, San Francisco (2008)
Levinson, S.C.: Pragmatics. Cambridge University Press, Cambridge (1983)
Lyons, J.: Semantics, vol. 2. Cambridge University Press, Cambridge (1977)
The World Wide Web Consortium: XQuery 1.0 and XPath 2.0 Formal Semantics, http://www.w3.org/TR/xquery-semantics/
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Carver, A. (2011). Roles in ORM: A Suggested Semantics. In: Meersman, R., Dillon, T., Herrero, P. (eds) On the Move to Meaningful Internet Systems: OTM 2011 Workshops. OTM 2011. Lecture Notes in Computer Science, vol 7046. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-25126-9_47
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DOI: https://doi.org/10.1007/978-3-642-25126-9_47
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