Searching for authors named "Vasilis Vassalos" – sorted by Relevance.
20 documents found, showing 1 through 10.
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XML Query Forms (XQForms): Declarative Specification of XML Query Interfaces
- …XQForms is the first generator of Web-based query forms and reports for XML data. XQForms takes as input (i) XML Schemas that model the data to be queried and presented, (ii) declarative specifications, called annotations, of the logic of the query forms and reports that will be generated, and (…
- Cited by 5 (3 self) – Add To MetaCart
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Vassalos: “Improving the Efficiency of XPath Execution on Relational Systems”. EDBT
- …Abstract: This work describes a method for processing XPath on a relational back-end that significantly limits the number of SQL joins required, takes advantage of the strengths of modern SQL query processors, exploits XML schema information and has low implementation complexity. The method is based…
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Using Knowledge of Redundancy for Query Optimization
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Using Knowledge of Redundancy for Query Optimization in Mediators
- …this paper. We will focus on what needs to be done after such inferences have been made. A set of source queries has already been divided into equivalence classes; at least one query from each class needs to be executed to obtain a complete…
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Expressive Capabilities Description Languages and Query Rewriting Algorithms
- …Information integration systems have to cope with a wide variety of different information sources, which support query interfaces with very varied capabilities. To deal with this problem, the integration systems need descriptions of the query capabilities of each source, i.e., the set of queries sup…
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Query Rewriting using Semistructured Views
- …We address the problem of query rewriting for MSL, a semistructured language developed at Stanford in the TSIMMIS project for information integration. We develop and present an algorithm that, given a semistructured query q and a set of semistructured views V, finds rewriting queries, i.e., queries…
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Architecture and implementation of an XQuery-based information integration platform
- …An increasing number of business users and software applications need to process information that is accessible via multiple diverse information systems, such as database systems, file systems, legacy applications or web services. We describe the Enosys XML Integration Platform (EXIP), a commercial …
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Query Rewriting for Semistructured Data
- … We address the problem of query rewriting for TSL, a language for querying semistructured data. We develop and present an algorithm that, given a semistructured query q and a set of semistructured views V, finds rewriting queries, i.e., queries that access the views and produce the same result as q…
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Describing and using query capabilities of heterogeneous sources
- …Information integration systems have to cope with the different and limited query interfaces of the underlying information sources. First, the integration systems need descriptions of the query capabilities of each source, i.e., the set of queries supported by each source. Second, the integration sy…
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Jiyang Kang Ki-Il Kum and Wonyong Sung, “A floatingpoint to integer c converter with shift reduction for fixedpoint digital signal processors
- …Abstract. The wide adoption of semistructured XML databases requires the existence of systems for the generation and execution of web-based interactive database query forms and reports. Such systems are most effective when they allow the construction of the query forms and reports without programmin…
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