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  1. Proceedings of the 9th ACM international workshop on Data warehousing and OLAP (DOLAP '06)
  2. Building a web warehouse for accessibility data
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Formal specification and optimization of ETL scenarios
Enhanced mining of association rules from data cubes
Building a web warehouse for accessibility data
Designing ETL processes using semantic web technologies
Research in data warehouse modeling and design: dead or alive?
HYPE: mining hierarchical sequential patterns
Designing what-if analysis: towards a methodology
Computing closest common subexpressions for view selection problems
A study on workload-aware wavelet synopses for point and range-sum queries
Triple-driven data modeling methodology in data warehousing: a case study
Towards a logical multidimensional model for spatial data warehousing and OLAP
Pre-aggregation with probability distributions
Heuristic design of property maps

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Building a web warehouse for accessibility data

Content Provider ACM Digital Library
Author Thomsen, Christian Pedersen, Torben Bach
Abstract As more and more information is available on the web, it is a problem that many web resources are not accessible, i.e., are not usable for users with special needs. For example, for a web page to be accessible, it should give text alternatives (i.e., explanatory texts) for images such that blind users that have the web pages read aloud automatically also can obtain information about the images. In the European Internet Accessibility Observatory (EIAO) project, a crawler that will evaluate the accessibility of thousands of European web sites is built. The crawler frequently performs many tests of the web sites and thus very large amounts of accessibility data are generated. Based on open-source software, a data warehouse (DW) called EIAO DW is built to make analysis of the complex accessibility data easy, reliable and fast. The EIAO DW is, thus, a data warehouse which measures properties of the web or, in other words, a web warehouse. It is believed that this work is the first to address the application of business intelligence (BI) techniques to the complex field of accessibility in a general and scalable way. This paper describes how the EIAO DW is designed and built. The paper introduces accessibility and the EIAO project to give a background for the design of EIAO DW. Then, the conceptual, logical and physical models are presented. The paper also gives descriptions of the complex Resource Description Framework (RDF) source data and complex accessibility aggregation functions supported by EIAO DW.
Starting Page 43
Ending Page 50
Page Count 8
File Format PDF
ISBN 1595935304
DOI 10.1145/1183512.1183522
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2006-11-10
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Web warehouse Accessibility
Content Type Text
Resource Type Article
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