scholarly journals Evaluating XML-Extended OLAP Queries Based on Physical Algebra

2009 ◽  
pp. 2510-2542
Author(s):  
Xuepeng Yin ◽  
Torben Bach Pedersen
Keyword(s):  
World Wide Web ◽  
World Wide ◽  
Data Sources ◽  
Query Evaluation ◽  
Xml Data ◽  
Query Engine ◽  
The World ◽  
Query Semantics ◽  
Evaluation Techniques

In today’s OLAP systems, physically integrating fast-changing data (e.g., stock quotes) into a cube is complex and time-consuming. The data is likely to be available in XML format on the World Wide Web (WWW); thus, instead of physical integration, making XML data logically federated with OLAP systems is desirable. In this article, we extend previous work on the logical federation of OLAP and XML data sources by presenting simplified query semantics, a physical query algebra, and a robust OLAP-XML query engine, as well as the query evaluation techniques. Performance experiments with a prototypical implementation suggest that the performance for OLAP-XML federations is comparable to queries on physically integrated data.

Effective Processing of XML-Extended OLAP Queries Based on a Physical Algebra

2011 ◽  
pp. 195-242
Author(s):  
Xuepeng Yin ◽  
Torben Bach Pedersen
Keyword(s):  
World Wide Web ◽  
World Wide ◽  
Data Sources ◽  
Query Evaluation ◽  
Xml Data ◽  
Query Engine ◽  
The World ◽  
Query Semantics ◽  
Evaluation Techniques

In today’s OLAP systems, physically integrating fast-changing data, for example, stock quotes, into a cube is complex and time-consuming. This data is likely to be available in XML format on the World Wide Web (WWW); thus, instead of physical integration, making XML data logically federated with OLAP systems is desirable. In this chapter, we extend previous work on the logical federation of OLAP and XML data sources by presenting simplified query semantics, a physical query algebra and a robust OLAP-XML query engine as well as the query evaluation techniques. Performance experiments with a prototypical implementation suggest that the performance for OLAP-XML federations is comparable to queries on physically integrated data.

Mining Association Rules from XML Data

2008 ◽  
pp. 59-71 ◽  
Author(s):  
Qin Ding ◽  
Gnanasekaran Sundarraj
Keyword(s):  
Data Mining ◽  
World Wide Web ◽  
Association Rules ◽  
World Wide ◽  
Structured Data ◽  
Rule Mining ◽  
Xml Data ◽  
Xml Documents ◽  
The World ◽  
Tools And Techniques

With the growing usage of XML in the World Wide Web and elsewhere as a standard for the exchange of data and to represent semi-structured data, there is an imminent need for tools and techniques to perform data mining on XML documents and XML repositories. In this chapter, we propose a framework for association rule mining on XML data. We present a Java-based implementation of the Apriori and the FP-Growth algorithms for this task and compare their performances. We also compare the performance of our implementation with an XQuery-based implementation.

Dancing Across the World Wide Web: Advocacy in the 21st Century

2009 ◽  
Author(s):  
Blair Williams Cronin ◽  
Ty Tedmon-Jones ◽  
Lora Wilson Mau
Keyword(s):  
World Wide Web ◽  
21St Century ◽  
World Wide ◽  
The World

THE EUROPEAN UNION FORUM ON KIDS' SAFETY IN INTERNET SIF 2019

2019 ◽  
pp. 3-6
Author(s):  
D. A. Bogdanova
Keyword(s):  
European Union ◽  
World Wide Web ◽  
World Wide ◽  
The European Union ◽  
Internet Forum ◽  
The World

The article provides an overview of the activities of the European Union Forum on kids' safety in Internet — Safer Internet Forum (SIF) 2019, which was held in Brussels, Belgium, in November 2019. The current Internet risks addressed by the World Wide Web users, especially children, are described.

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