Filters








344 Hits in 4.1 sec

Using superimposed multidimensional schemas and OLAP patterns for RDF data analysis

Median Hilal, Christoph G. Schuetz, Michael Schrefl
2018 Open Computer Science  
The complexity of RDF data in terms of structure, semantics, and query languages renders RDF data analysis challenging for a typical analyst not familiar with the underlying data model or the SPARQL query  ...  Analysts may compose queries by instantiating a pattern using only the MD concepts and business terms.  ...  Future work will integrate guided query formulation using OLAP patterns for RDF sources [26] .  ... 
doi:10.1515/comp-2018-0003 fatcat:fimngrnvpzdkxdsefuv2k7skxy

Preference-based datacube analysis with MYOLAP

Paolo Biondi, Matteo Golfarelli, Stefano Rizzi
2011 2011 IEEE 27th International Conference on Data Engineering  
In this demonstration we present MYOLAP, a Javabased tool that allows OLAP analyses to be personalized and enhanced by expressing "soft" query constraints in the form of user preferences.  ...  The demonstration will show how analysis sessions can benefit from coupling ad-hoc preference constructors with the classical OLAP operators, and in particular how MYOLAP supports users in expressing preference  ...  Remarkably, adopting the substitutability semantics [3] allows for closing the set of composition operators on the set of preferences, thus obtaining an algebra.  ... 
doi:10.1109/icde.2011.5767946 dblp:conf/icde/BiondiGR11 fatcat:dyfh4e7wnzclxjpowqwuxr2ihu

Building data warehouses with semantic web data

Victoria Nebot, Rafael Berlanga
2012 Decision Support Systems  
provided by OLAP-style aggregations, navigation, and reporting.  ...  In this paper, we provide the means for efficiently analyzing and exploring large amounts of semantic data by combining the inference power from the annotation semantics with the analysis capabilities  ...  they are guided by the semantics of the ontology.  ... 
doi:10.1016/j.dss.2011.11.009 fatcat:veitg55enfai7mn54agbwzogbi

Semantic Metadata for Supporting Exploratory OLAP [article]

Jovan Varga
2016 Ph.d.-serien for Det Teknisk-Naturvidenskabelige Fakultet, Aalborg Universitet  
RDF 5 graphs can be queried with the SPARQL query language [82] . It applies pattern matching techniques to retrieve sub-graphs (i.e., set of triples) that fit the pattern (i.e., the query).  ...  The other template retrieves the instances of graph patterns that includes both nodes and edges related to composite analytical features.  ...  QL provides a higher abstraction level that is more intuitive to typical OLAP users that only need to write relatively simple QL programs (e.g., the above query translates to more than 30 lines of SPARQL  ... 
doi:10.5278/vbn.phd.engsci.00172 fatcat:2jvgnvvmznh7dk7dap2aipiiii

A Prototyped NL-Based Approach for the Design of Multidimensional Data Warehouse

Abeer Alzahrani, Mohamed Alqarni, Jamel Feki
2020 International Journal of Computer and Information Technology(2279-0764)  
Secondly, our approach aims to generate semi-automatically a DW schema from a set of requirements gathered as analytical queries compliant to the NL-templates.  ...  Query composition.  ...  Is it free NL or template-guided sentences? How to solve semantic ambiguities due to natural language?  ... 
doi:10.24203/ijcit.v9i5.39 fatcat:gqgyig62knhkfmvbbuzeibfiou

RDF analytics

Dario Colazzo, François Goasdoué, Ioana Manolescu, Alexandra Roatiş
2014 Proceedings of the 23rd international conference on World wide web - WWW '14  
The development of Semantic Web (RDF) brings new requirements for data analytics tools and methods, going beyond querying to semantics-rich analytics through warehouse-style tools.  ...  well as powerful aggregation and iii) OLAP-style operations.  ...  composition [25] , or Map-Reduce based RDF processing [20, 21] .  ... 
doi:10.1145/2566486.2567982 dblp:conf/www/ColazzoGMR14 fatcat:cmpityy5e5bh5pkgw25x2lguja

A methodology for social BI

Matteo Francia, Matteo Golfarelli, Stefano Rizzi
2014 Proceedings of the 18th International Database Engineering & Applications Symposium on - IDEAS '14  
Social BI (SBI) is the emerging discipline that aims at combining corporate data with textual user-generated content (UGC) to let decision-makers analyze their business based on the trends perceived from  ...  : we study two real projects with different characteristics and in different areas; both projects were carried out by skilled teams but with different compositions and size. • Theory-Frame of reference  ...  The test results are inspected with users, which may easily lead to: 1. go back to crawling design to better tune the crawling queries or templates to improve precision and recall; 2. go back to semantic  ... 
doi:10.1145/2628194.2628250 dblp:conf/ideas/FranciaGR14 fatcat:r6gx34bnkzbrnnxoh5hebfst24

An integrated personalization framework for SaaS-based cloud services

Haolong Fan, Farookh Khadeer Hussain, Muhammad Younas, Omar Khadeer Hussain
2015 Future generations computer systems  
The objective is to provide an integrated and structured environment wherein SaaS services can be provisioned with enhanced personalization quality and performance.  ...  OLAP is usually associated with the traditional data warehouse for mining data using multiple taxonomies [40, 33] .  ...  Based on semantic warehousing, Nebot and Berlanga [40] advanced a solution that combines data warehousing and OLAP techniques in the semantic area.  ... 
doi:10.1016/j.future.2015.05.011 fatcat:iqic2upcmfevrpejim732ydzdm

Sigma Worksheet: Interactive Construction of OLAP Queries [article]

James Gale and Max Seiden and Gretchen Atwood and Jason Frantz and Rob Woollen and Çağatay Demiralp
2021 arXiv   pre-print
We then measure the performance of the Worksheet generated queries with a set of experiments using the TPC-H benchmark.  ...  Results show the performance of our compiled SQL queries is comparable to that of the reference queries of the benchmark.  ...  We also thank the early users of Sigma for teaching us so much and having patience with our bugs. Special thanks to Zack Norton for producing and narrating our demonstration video.  ... 
arXiv:2012.00697v3 fatcat:xezl2ygjrfhghg6tcrzzgegigi

An architecture for ad-hoc and collaborative business intelligence

Henrike Berthold, Philipp Rösch, Stefan Zöller, Felix Wortmann, Alessio Carenini, Stuart Campbell, Pascal Bisson, Frank Strohmaier
2010 Proceedings of the 1st International Workshop on Data Semantics - DataSem '10  
With the help of a wizard, the configuration process can be guided by questions like "Do you want analytical support for the sales planning?"  ...  These information models may comprise amongst others queries, OLAP cubes, measures, dimensions etc. for a specific purpose like sales planning.  ... 
doi:10.1145/1754239.1754254 dblp:conf/edbtw/BertholdRZWCCBS10 fatcat:r325fndxujhfvjxjemhtfjf4ee

Expressive and Scalable Query-Based Faceted Search over SPARQL Endpoints [chapter]

Sébastien Ferré
2014 Lecture Notes in Computer Science  
In this paper, we further reconcile QFS with scalability and portability by building QFS over SPARQL endpoints. We also improve expressivity and readability.  ...  Queries are now verbalized in English, so that no knowledge of SPARQL is ever necessary.  ...  Conclusion We have improved Query-based Faceted Search (QFS) with NL verbalization for readability, and with SPARQL endpoint-based computation of results and suggestions for scalability and portability  ... 
doi:10.1007/978-3-319-11915-1_28 fatcat:kxbbe7j5pzbxleolyo3fjavsui

Business Intelligence Architecture Informed by Organisational Semiotics [chapter]

John Effah, Prince Kwame Senyo, Stephen Opoku-Anokye
2018 IFIP Advances in Information and Communication Technology  
Organisational semiotics offers frameworks and model which can be used to develop a BI architecture with combined technical and social views.  ...  The underlying technique was analysis and reporting with OLAP, general query and ad-hoc query tools as supporting technologies.  ...  Second, data analyses and reporting techniques depend on OLAP and query tools to generate information.  ... 
doi:10.1007/978-3-319-94541-5_27 fatcat:iricgj4a7zfndhh2cucyoosh7i

Data Modeling and Data Analytics: A Survey from a Big Data Perspective

André Ribeiro, Afonso Silva, Alberto Rodrigues da Silva
2015 Journal of Software Engineering and Applications  
Despite that, analyzing properly Big Data can constitute great advantages because it allows discovering patterns and correlations in datasets.  ...  More specifically, the goal of our team in this project is to identify the main concepts and patterns that characterize such applications, in order to define and apply suitable domain-specific languages  ...  The benefit in this, is that queries are much simpler and faster, and by using a cube it is even quicker to detect patterns, find trends and navigate around the data while "slicing and dicing" with it  ... 
doi:10.4236/jsea.2015.812058 fatcat:lad4m6uwqfghjkhh7xybgrvlsm

A framework for multidimensional design of data warehouses from ontologies

Oscar Romero, Alberto Abelló
2010 Data & Knowledge Engineering  
A logical schema is tied to the design decisions made when devising the system and these decisions either made to fulfill the system requirements (for instance, improve query answering, avoid insertion  ...  For instance, we can extend the data warehouse and OLAP concepts to other areas like the Semantic Web and one consequence would be that despite the data warehouse design has been typically guided by data  ...  For instance, we can extend the data warehouse and OLAP concepts to other areas like the Semantic Web, where ontologies play a key role providing a common vocabulary.  ... 
doi:10.1016/j.datak.2010.07.007 fatcat:iv7z7xm3crculdhvnmkf5attru

Mining heterogeneous information networks

Yizhou Sun, Jiawei Han
2013 SIGKDD Explorations  
We view interconnected, multityped data, including the typical relational database data, as heterogeneous information networks, study how to leverage the rich semantic meaning of structural types of objects  ...  For example, structural search [29] , which tries to find semantically similar structures given a structural query, may be useful for finding pattern in an e-commerce network involving buyers, sellers  ...  These constraints make a heterogeneous information network semi-structured, guiding the exploration of the semantics of the network.  ... 
doi:10.1145/2481244.2481248 fatcat:ovj4ra5qqjb6xjoox64ctdlfwm
« Previous Showing results 1 — 15 out of 344 results