Results 1 - 10 of 3,441,564

Storing and querying ordered xml using a relational database system

by Igor Tatarinov, Kevin Beyer, Jayavel Shanmugasundaram - In SIGMOD , 2002
"... XML is quickly becoming the de facto standard for data exchange over the Intemet. This is creating a new set of data management requirements involving XML, such as the need to store and query XML documents. Researchers have proposed using relational database systems to satisfy these requirements by ..."
Abstract - Cited by 283 (3 self) - Add to MetaCart
XML is quickly becoming the de facto standard for data exchange over the Intemet. This is creating a new set of data management requirements involving XML, such as the need to store and query XML documents. Researchers have proposed using relational database systems to satisfy these requirements

Set-Oriented Production Rules in Relational Database Systems

by Jennifer Widom, Sheldon J. Finkelstein , 1990
"... We propose incorporating a production rules facility into a relational database system. Such a facility allows definition of database operations that are automatically executed whenever certain conditions are met. In keeping with the set-oriented approach of relational data manipulation languages, o ..."
Abstract - Cited by 151 (16 self) - Add to MetaCart
We propose incorporating a production rules facility into a relational database system. Such a facility allows definition of database operations that are automatically executed whenever certain conditions are met. In keeping with the set-oriented approach of relational data manipulation languages

Integrity control in relational database systems - an overview

by Paul W. P. J. Grefen, Peter M. G. Apers - Data & Knowledge Engineering , 1993
"... Grefen, P.W.P.J. and P.M.G. Apers, Integrity control in relational database systems- An overview, Data & ..."
Abstract - Cited by 45 (3 self) - Add to MetaCart
Grefen, P.W.P.J. and P.M.G. Apers, Integrity control in relational database systems- An overview, Data &

Relational Database Systems

by Ji-won Byun, Elisa Bertino, Ninghui Li, Elisa Bertino, Ninghui Li
"... In this paper, we present a comprehensive approach for privacy preserving access control based on the notion of purpose. Purpose information associated with a given data element specifies the intended use of the data element, and our model allows multiple purposes to be associated with each data ele ..."
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purposes can be associated. We address this issue in the context of relational databases and propose four different labeling schemes, each providing a different granularity. In the paper we also propose an approach to representing purpose information, which results in very low storage overhead, and we

Buffer management in relational database systems

by Giovanni Maria Sacco, Mario Schkolnick - ACM Transactions on Database Systems , 1986
"... The hot-set model, characterizing the buffer requirements of relational queries, is presented. This model allows the system to determine the optimal buffer space to be allocated to a query; it can also be used by the query optimizer to derive efficient execution plans accounting for the available bu ..."
Abstract - Cited by 54 (1 self) - Add to MetaCart
The hot-set model, characterizing the buffer requirements of relational queries, is presented. This model allows the system to determine the optimal buffer space to be allocated to a query; it can also be used by the query optimizer to derive efficient execution plans accounting for the available

Gral: An Extensible Relational Database System for Geometric Applications

by Ralf Hartmut Güting - PROC. OF THE 15TH INTL. CONF. ON VERY LARGE DATA BASES , 1989
"... We describe the architecture of a relational database system that is extensible by user-defined data types and operations, including relation operations. The central concept is to use languages based on many-sorted algebra to represent queries as well as query execution plans. This leads to a simple ..."
Abstract - Cited by 49 (13 self) - Add to MetaCart
We describe the architecture of a relational database system that is extensible by user-defined data types and operations, including relation operations. The central concept is to use languages based on many-sorted algebra to represent queries as well as query execution plans. This leads to a

Implementation of Magic-sets in a Relational Database System

by Inderpal Singh Mumick, Hamid Pirahesh - In Proc. of ACM SIGMOD , 1994
"... We describe the implementation of the magic-sets transformation in the Starburst extensible relational database system. To our knowledge this is the first implementation of the magic-sets transformation in a relational database system. The Starburst implementation has many novel features that make o ..."
Abstract - Cited by 21 (1 self) - Add to MetaCart
We describe the implementation of the magic-sets transformation in the Starburst extensible relational database system. To our knowledge this is the first implementation of the magic-sets transformation in a relational database system. The Starburst implementation has many novel features that make

Query evaluation techniques for large databases

by Goetz Graefe - ACM COMPUTING SURVEYS , 1993
"... Database management systems will continue to manage large data volumes. Thus, efficient algorithms for accessing and manipulating large sets and sequences will be required to provide acceptable performance. The advent of object-oriented and extensible database systems will not solve this problem. On ..."
Abstract - Cited by 767 (11 self) - Add to MetaCart
is essential for the designer of database management software. This survey provides a foundation for the design and implementation of query execution facilities in new database management systems. It describes a wide array of practical query evaluation techniques for both relational and post-relational

Running Head: Integrating XML and Relational Database Systems

by Elisabeth Kapsammer, Werner Retschitzegger
"... Abstract. Relational databases get more and more employed in order to store the content of a web site. At the same time, XML is fast emerging as the dominant standard at the hypertext level of web site management describing pages and links between them. Thus, the integration of XML with relational d ..."
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schema specification languages and relational database systems is provided. Second, basic kinds of mappings between XML concepts and relational concepts are presented and reasonable mappings in terms of mapping patterns are determined. Third, design alternatives for integrating XML and relational

Querying Ontologies in Relational Database Systems

by Silke Trißl, Ulf Leser - In Proc. of the DILS , 2005
"... Abstract. In many areas of life science, such as biology and medicine, ontologies are nowadays commonly used to annotate objects of interest, such as biological samples, clinical pictures, or species in a standardized way. In these applications, an ontology is merely a structured vocabulary in the f ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
in the form of a tree or a directed acyclic graph of concepts. Typically, ontologies are stored together with the data they annotate in relational databases. Querying such annotations must obey the special semantics encoded in the structure of the ontology, i.e. relationships between terms, which
Results 1 - 10 of 3,441,564