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Benchmarking Summarizability Processing in XML Warehouses with Complex Hierarchies [article]

Chantola Kit, Jérôme Darmont
2013 arXiv   pre-print
The benchmark enables us to generate XML data warehouses with scalable complex hierarchies as well as summarizability processing.  ...  In order to contribute to summarizability analysis, this paper proposes an extension to the XML warehouse benchmark (XWeB) with complex hierarchies.  ...  In order to fill in this gap, we extend in this paper the XML data warehouse benchmark [13] with scalable complex hierarchy generation and summarizability processing.  ... 
arXiv:1308.6683v1 fatcat:crvmdodxcfgd5ftxjspveijzki

Benchmarking summarizability processing in XML warehouses with complex hierarchies

Chantola Kit, Marouane Hachicha, Jérôme Darmont
2012 Proceedings of the fifteenth international workshop on Data warehousing and OLAP - DOLAP '12  
In order to fill in this gap, we extend in this paper the XML data warehouse benchmark [13] with scalable complex hierarchy generation and summarizability processing.  ...  CONCLUSION To the best of our knowledge, our benchmark is the first XML data warehouse benchmark with complex hierarchies.  ... 
doi:10.1145/2390045.2390058 dblp:conf/dolap/KitHD12 fatcat:yy5zokuekbg4ndk5cfeqqrdgku

A Novel Query-Based Approach for Addressing Summarizability Issues in XOLAP [article]

Marouane Hachicha, Jérôme Darmont
2013 arXiv   pre-print
with complex hierarchies than the relational model.  ...  In many real-world situations, hierarchies in MD models are complex, which causes data aggregation issues, collectively known as the summarizability problem.  ...  QUERY-BASED COMPLEX HIERARCHY MANAGEMENT IN XOLAP Motivation and Contributions In XML data warehouses and XOLAP, complex data structures, and especially complex hierarchies, are likely to be present,  ... 
arXiv:1308.6682v1 fatcat:k57of4aqjbhfzlnaugxarpqaqe

DC Proposal: Online Analytical Processing of Statistical Linked Data [chapter]

Benedikt Kämpgen
2011 Lecture Notes in Computer Science  
Linked Data for expressive and reliable analysis, we propose to use expressive Semantic Web ontologies to build and evolve a well-interlinked conceptual model of statistical data for Online Analytical Processing  ...  Only for time dimensions, we consider the natural time hierarchy of year, month and day. More complex Hierarchies may be useful [4] .  ...  In order to integrate information from different datasources a more complex MDM may be needed.  ... 
doi:10.1007/978-3-642-25093-4_22 fatcat:4ahg6n73erd3lauji7hd45n5pi

GEM: Requirement-Driven Generation of ETL and Multidimensional Conceptual Designs [chapter]

Oscar Romero, Alkis Simitsis, Alberto Abelló
2011 Lecture Notes in Computer Science  
We present our method in terms of the TPC-DS benchmark and show its applicability and usefulness.  ...  The goal of our research is to provide designers with a semi-automatic means for producing conceptual multidimensional designs and also, conceptual representation of the extract-transform-load (ETL) processes  ...  The validation process introduced in this stage guarantees the multidimensional normal forms presented in [6, 7] for validating the output MD schema, and the summarizability constraints discussed in  ... 
doi:10.1007/978-3-642-23544-3_7 fatcat:rsntllc3irbsnju5u3fwzmarru

Holistic Statistical Open Data integration based on integer linear programming

Alain Berro, Imen Megdiche, Olivier Teste
2015 2015 IEEE 9th International Conference on Research Challenges in Information Science (RCIS)  
However, as these data are scattered in several tables, it is a slow and costly process to use existing pairwise schema matching approaches to integrate several schemas of the tables.  ...  The program encompasses different constraints related to graph structures and matching setup, in particular 1:1 matching.  ...  We named LP4HM(relax) a relaxed version of LP4HM with decision variables in [0,1] resolving complex matching cardinalities (n:m).  ... 
doi:10.1109/rcis.2015.7128908 dblp:conf/rcis/BerroMT15 fatcat:2gbic4mvobgn7p3az7vvujxa5e

Bridging Decision Applications and Multidimensional Databases

Fatemeh Nargesian, Université D'Ottawa / University Of Ottawa, Université D'Ottawa / University Of Ottawa
2011
Moreover, the homogeneity and summarizability of data in conceptual models is the key to accurate query answering, a necessity in decision making environments.  ...  The algorithm compiles these correspondences into a set of mappings that associate each construct in the conceptual model with a query on the physical model.  ...  The root of the XML model for CDL is a complex type that pertains to property, level, dimension, level, factRelationship, and sometimes hierarchy.  ... 
doi:10.20381/ruor-4576 fatcat:rclsiknlzzeodlucd5z7k75lxe

Semantic Metadata for Supporting Exploratory OLAP [article]

Jovan Varga
2016 Ph.d.-serien for Det Teknisk-Naturvidenskabelige Fakultet, Aalborg Universitet  
We only consider linear hierarchies since, in practice, complex hierarchies (see [81] for more details) with many-to-many cardinalities are typically transformed to linear hierarchies with many-to-one  ...  Resource Description Framework The means for flexible (meta)data representation range from XML 2 that in principle only tags the (meta)data elements, to semantically rich but computationally complex approaches  ...  A key feature to promote the use of our proposal is to relieve OLAP users from the need of learning a new and complex language like SPARQL.  ... 
doi:10.5278/vbn.phd.engsci.00172 fatcat:2jvgnvvmznh7dk7dap2aipiiii

Citation analysis of database publications

Erhard Rahm, Andreas Thor
2005 SIGMOD record  
Jayavel's research interests include Internet data management, IR, and query processing in emerging system architectures.  ...  His current research interests include intelligent search on semistructured data, combining DB technology with IR techniques, and "autonomic" peer-to-peer information management.  ...  There will be other data models in the hierarchy, including the relational model, XML with schema, RDF, OWL (the Web Ontology Language).  ... 
doi:10.1145/1107499.1107505 fatcat:c4evhhw6y5difggghxsvvdqzeu

Aalborg Universitet Aspects of data modeling and query processing for complex multidimensional data Aspects of Data Modeling and Query Processing for Complex Multidimensional Data Aspects of Data Modeling and Query Processing for Complex Multidimensional Data Project Title The Clinical Data Warehouse

Torben Pedersen, Bach, Torben Pedersen, Torben Pedersen
unpublished
This thesis is about data modeling and query processing for complex multidimensional data.  ...  data with varying granularities.  ...  processing for complex multidimensional data.  ... 
fatcat:kjbc75rv7vcjhidlc4g65lzbui

Business Intelligence on Non-Conventional Data

Enrico Coordinatore, Dottorato Relatore, Paolo Ciaccia, Rizzi
2017 unpublished
In this context, this thesis proposes an interactive and collaborative approach to build aggregation hierarchies from linked data.  ...  In this context, this thesis proposes an approach to determine the schema profile of a document-based database; the goal is to facilitate users in a schema-on-read analysis process by understanding the  ...  that hides the complexity of the detection process to let the user focus on the creation of hierarchies.  ... 
fatcat:uekhffnqtreozpej576opg56k4

Semantic Metadata for Supporting Exploratory OLAP. Aalborg Universitetsforlag

Jovan Varga, Jovan Varga, Jovan Dissertation, Varga, Assoc, Oscar Romero, Ph Aau, Supervisor, Bach Torben, Pedersen, Ph Aau, Co-Supervisor (+7 others)
2016 unpublished
MD data are typically stored in a data warehouse, which integrates data from in-house data sources, and then analyzed by means of OLAP operations, e.g., sales data can be (dis)aggregated along the location  ...  The framework includes the definition of the assistance process, the AM artifacts that are classified in a taxonomy, and the artifacts organization and related types of processing to support the user assistance  ...  We only consider linear hierarchies since, in practice, complex hierarchies (see [81] for more details) with many-to-many cardinalities are typically transformed to linear hierarchies with many-to-one  ... 
fatcat:u4qyajrcyvdirlhmqbofjuy2cy