Results 251 to 260 of about 983,529 (297)
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1992
We investigate the expressive power of query languages with counting ability. We define a LOGSPACE extension of first order logic and a PTIME extension of fixpoint logic with counters. We develop specific techniques, such as games, for dealing with languages with counters and therefore integers. We prove in particular that the arity of the tuples which
Stéphane Grumbach, Christophe Tollu
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We investigate the expressive power of query languages with counting ability. We define a LOGSPACE extension of first order logic and a PTIME extension of fixpoint logic with counters. We develop specific techniques, such as games, for dealing with languages with counters and therefore integers. We prove in particular that the arity of the tuples which
Stéphane Grumbach, Christophe Tollu
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Proceedings of the ACM annual conference on - ACM '72, 1972
Natural English as a query language offers the ultimate in directness for man-machine communications and has new and powerful potentials for interactive problem solving. The linguistic problems underlying machine interpretation and generation of natural English, however, have been slow in yielding to solution, though recent successes have raised new ...
Burt M. Leavenworth +8 more
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Natural English as a query language offers the ultimate in directness for man-machine communications and has new and powerful potentials for interactive problem solving. The linguistic problems underlying machine interpretation and generation of natural English, however, have been slow in yielding to solution, though recent successes have raised new ...
Burt M. Leavenworth +8 more
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IEEE Transactions on Knowledge and Data Engineering, 1993
We define the query language Vizla, in which answers to queries are built up by pointing to representations of sets and functions in a conceptual model of the data base of an application, and to iconic identifiers of computational operators or control constructs.
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We define the query language Vizla, in which answers to queries are built up by pointing to representations of sets and functions in a conceptual model of the data base of an application, and to iconic identifiers of computational operators or control constructs.
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The Metaphor GIS Query Language
Journal of Visual Languages & Computing, 2000In recent years, visual representations have been increasingly used in the management of real-world phenomena as a valuable support for human?computer interaction. In the field of Geographic Information Systems, visual languages represent a promising means for allowing unskilled users to query geographic databases.
SEBILLO, Monica Maria Lucia +2 more
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Computational Power in Query Languages
SIAM Journal on Computing, 1982Primitive recursion, recursion and partial recursion are defined for languages which query a relational data base. Necessary and sufficient conditions for a language to satisfy these properties are given. The computational power of several extensions of the relational algebra is considered.
Henry W. Davis, Leon E. Winslow
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A coherent query language for XML
Journal of Intelligent Information Systems, 2008Text search engines are inadequate for indexing and searching XML documents because they ignore metadata and aggregation structure implicit in the XML documents. On the other hand, the query languages supported by specialized XML search engines are very complex.
Thirunarayan, Krishnaprasad +1 more
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A multimedia query specification language
Proceedings. International Workshop on Multi-Media Database Management Systems, 1996Typically, multimedia applications involve thousands of hours of video, images, audio, text and graphics that need to be stored, retrieved and manipulated in a large multimedia database. There is therefore an important need for novel techniques and systems which provide an efficient retrieval facility of the voluminous information stored in the ...
Naél Hirzalla, Ahmed Karmouch
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The Constellation Query Language
2009Collaboration in modeling is essential to success, but ORM diagrams intimidate many business people, and most would never install an ORM modeling tool on their computers. The Constellation Query Language (CQL) offers an alternative able to represent almost any ORM2 model in plain text using natural language, with the goal of supporting involvement ...
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The t4sql temporal query language
Proceedings of the sixteenth ACM conference on Conference on information and knowledge management, 2007Time characterizes every aspect of our life and its management when storing and querying data is very important. In this paper we propose a new temporal query language, called T4SQL, supporting multiple temporal dimensions of data. Besides the well-known valid and transaction times, it encompasses two additional temporal dimensions, namely ...
COMBI, CARLO +2 more
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