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- research-articleNovember 2007
Even straight forward data warehouses are complicated
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 103–104https://doi.org/10.1145/1317331.1317352This panel paper will suggest some areas of research that I think people working in companies with data warehousing and business intelligence would like that the research community gave more attention.
- research-articleNovember 2007
Warehousing the world: a few remaining challenges
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 101–102https://doi.org/10.1145/1317331.1317351Data warehouses (DWs) have become very successful in many enterprises, but only for relatively simple and traditional types of data. It is now time to extend the benefits of DWs to a much wider range of data, making it feasible to literally "warehouse ...
- research-articleNovember 2007
OLAP preferences: a research agenda
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 99–100https://doi.org/10.1145/1317331.1317350Expressing preferences when querying databases is a natural way to avoid empty results and information flooding, and in general to rank results so that the user may first see the data that better match his tastes. In this paper we outline the main ...
- research-articleNovember 2007
Improving business intelligence speed and quality through the OODA concept
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 97–98https://doi.org/10.1145/1317331.1317349This article introduces the Observation-Orientation-Decision-Action (OODA) concept as a mean to identify three new desired technologies in business intelligence applications that improve the speed and quality in the decision making processes.
- research-articleNovember 2007
Mining unexpected multidimensional rules
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 89–96https://doi.org/10.1145/1317331.1317347Discovering unexpected rules is essential, particularly for industrial applications with marketing stakes. In this context, many works have been done for association rules. However, none of them addresses sequences. In this paper, we thus propose to ...
- research-articleNovember 2007
CT-OLAP: temporal multidimensional data model and algebra for moving objects
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 81–88https://doi.org/10.1145/1317331.1317346Sequenced queries are queries that are conceptually evaluated at each time instant. Therefore, this kind of queries return functions of time. Some applications (e.g., traffic analysis) need support for sequenced queries on data about continuous changes. ...
- research-articleNovember 2007
Efficient computation of view subsets
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 65–72https://doi.org/10.1145/1317331.1317343Over the past ten to fifteen years, data warehouse platformshave grown enormously, both in terms of their importance and their sheer size. Traditionally, such systems have been based upon a dimensional model known as the Star Schema that consists of a ...
- research-articleNovember 2007
Partition-based workload scheduling in living data warehouse environments
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 57–64https://doi.org/10.1145/1317331.1317342The demand for so-called living or real-time data warehouses is increasing in many application areas such as manufacturing, event monitoring and telecommunications. In these fields users usually expect short response times for their queries and high ...
- research-articleNovember 2007
Deciding the physical implementation of ETL workflows
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 49–56https://doi.org/10.1145/1317331.1317341In this paper, we deal with the problem of determining the best possible physical implementation of an ETL workflow, given its logical-level description and an appropriate cost model as inputs. We formulate the problem as a state-space problem and ...
- research-articleNovember 2007
RLH: bitmap compression technique based on run-length and huffman encoding
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 41–48https://doi.org/10.1145/1317331.1317339In this paper we present a technique of compressing bitmap indexes for application in data warehouses. The developed compression technique, called Run-Length Huffman (RLH), is based on the run-length encoding and on the Huffman encoding. RLH was ...
- research-articleNovember 2007
A probabilistic model for data cube compression and query approximation
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 33–40https://doi.org/10.1145/1317331.1317338Databases and data warehouses contain an overwhelming volume of information that users must wade through in order to extract valuable and actionable knowledge to supportthe decision-making process. This contribution addresses the problem of ...
- research-articleNovember 2007
Optimal chunking of large multidimensional arrays for data warehousing
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 25–32https://doi.org/10.1145/1317331.1317337Very large multidimensional arrays are commonly used in data intensive scientific computations as well ason-line analytical processing applications referred to as MOLAP. The storage organization of such arrays on disks is done by partitioning the large ...
- research-articleNovember 2007
A comparison of five probabilistic view-size estimation techniques in OLAP
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 17–24https://doi.org/10.1145/1317331.1317335A data warehouse cannot materialize all possible views, hence we must estimate quickly, accurately, and reliably the size of views to determine the best candidates for materialization. Many available techniques for view-size estimation make particular ...
- research-articleNovember 2007
SAMSTAR: a semi-automated lexical method for generating star schemas from an entity-relationship diagram
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 9–16https://doi.org/10.1145/1317331.1317334The star schema is widely accepted as the de facto data model for data warehouse design. A popular approach for developing a star schema is to develop it from an entity-relationship diagram with some heuristics. Most of the existing approaches analyze ...
- research-articleNovember 2007
Automating multidimensional design from ontologies
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAPPages 1–8https://doi.org/10.1145/1317331.1317333This paper presents a new approach to automate the multidimensional design of Data Warehouses. In our approach we propose a semi-automatable method aimed to find the business multidimensional concepts from a domain ontology representing different and ...
- proceedingNovember 2007
DOLAP '07: Proceedings of the ACM tenth international workshop on Data warehousing and OLAP
It is our great pleasure to welcome you at the 10th ACM International Workshop on Data Warehousing and OLAP -- DOLAP'07. Continuing the tradition of previous successful DOLAP workshops, the DOLAP 2007 workshop provides an international forum where both ...