Database Systems (TODS)


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ACM Transactions on Database Systems (TODS), Volume 26 Issue 3, September 2001

Richard Snodgrass
Pages: 261-263
DOI: 10.1145/502030.505049

Probabilistic object bases
Thomas Eiter, James J. Lu, Thomas Lukasiewicz, V. S. Subrahmanian
Pages: 264-312
DOI: 10.1145/502030.502031
Although there are many applications where an object-oriented data model is a good way of representing and querying data, current object database systems are unable to handle objects whose attributes are uncertain. In this article, we extend previous...

Answering queries with useful bindings
Chen Li, Edward Chang
Pages: 313-343
DOI: 10.1145/502030.502032
In information-integration systems, sources may have diverse and limited query capabilities. To obtain maximum information from these restrictive sources to answer a query, one can access sources that are not specified in the query (i.e., off-query...

An extension of the relational data model to incorporate ordered domains
Wilfred Ng
Pages: 344-383
DOI: 10.1145/502030.502033
We extend the relational data model to incorporate partial orderings into data domains, which we call the ordered relational model. Within the extended model, we define the partially ordered relational algebra (the PORA) by allowing the ordering...