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SETLBI: An Integrated Platform for Semantic Business Intelligence

Rudra Pratap Deb Nath, Katja Hose, Torben Bach Pedersen, Oscar Romero, Amrit Bhattacharjee
2020 Companion Proceedings of the Web Conference 2020  
To enable self-service OLAP analysis over RDF datasets, an OLAP endpoint has been presented in [7] . At first, they superimpose an MD schema over an RDF dataset.  ...  Then, semantic analysis graphs are built on top of the MD schema where each node of the graph presents an analysis situation corresponding to a MD query and an edge corresponds to a set of OLAP operations  ... 
doi:10.1145/3366424.3383533 dblp:conf/www/NathHP0B20 fatcat:ej4k656t4jc6hiw5wvgag4c7fq

Using superimposed multidimensional schemas and OLAP patterns for RDF data analysis

Median Hilal, Christoph G. Schuetz, Michael Schrefl
2018 Open Computer Science  
On top of that, we introduce OLAP patterns for RDF data analysis, which are recurring, domain-independent elements of data analysis.  ...  The foundations for traditional data analysis are Online Analytical Processing (OLAP) systems that operate on multidimensional (MD) data.  ...  Evaluation: We adapt semantic OLAP patterns and analysis graphs for RDF data analysis, concepts previously employed for relational OLAP [7, 26] .  ... 
doi:10.1515/comp-2018-0003 fatcat:fimngrnvpzdkxdsefuv2k7skxy

QB2OLAP: Enabling OLAP on Statistical Linked Open Data

Jovan Varga, Lorena Etcheverry, Alejandro A. Vaisman, Oscar Romero, Torben Bach Pedersen, Christian Thomsen
2016 2016 IEEE 32nd International Conference on Data Engineering (ICDE)  
Publication and sharing of multidimensional (MD) data on the Semantic Web (SW) opens new opportunities for the use of On-Line Analytical Processing (OLAP).  ...  In this demo, we present QB2OLAP, a tool for enabling OLAP on existing QB data.  ...  It is currently being used in several research projects concerning OLAP over RDF data.  ... 
doi:10.1109/icde.2016.7498341 dblp:conf/icde/VargaEVRPT16 fatcat:zapuhplf4zauhh3lnxbpl6sesq

Optimizing Analytical Queries over Semantic Web Sources [article]

Dilshod Ibragimov
2017 PhD series, Technical Faculty of IT and Design, ˜Aalborg=ålborgœ University  
Our approach does not require a relational database for the OLAP analysis of web data.  ...  For this purpose, LITE models source and target schemas as RDF schema graphs that highlights the structure of the data available for the analysis.  ... 
doi:10.5278/vbn.phd.tech.00022 fatcat:5d2lmnicazgmze2qhe5cikowwm

SM4MQ: A Semantic Model for Multidimensional Queries [chapter]

Jovan Varga, Ekaterina Dobrokhotova, Oscar Romero, Torben Bach Pedersen, Christian Thomsen
2017 Lecture Notes in Computer Science  
On top of that, Exploratory OLAP is a novel initiative for the convergence of OLAP and the Semantic Web (SW) that enables the use of OLAP techniques on SW data.  ...  On-Line Analytical Processing (OLAP) is a data analysis approach to support decision-making.  ...  To support the publishing of MD data and their OLAP analysis directly on the SW, two RDF vocabularies were proposed, namely the RDF Data Cube (QB) and QB4OLAP vocabularies.  ... 
doi:10.1007/978-3-319-58068-5_28 fatcat:qz5j4vwh7je3feqoi3ehqhzi7y

Towards Exploratory OLAP Over Linked Open Data – A Case Study [chapter]

Dilshod Ibragimov, Katja Hose, Torben Bach Pedersen, Esteban Zimányi
2015 Lecture Notes in Business Information Processing  
In this paper we describe a framework for so-called Exploratory OLAP over RDF sources. We propose a system that uses a multidimensional schema of the OLAP cube expressed in RDF vocabularies.  ...  Data Warehouses (DW) and Online Analytical Processing (OLAP) tools are used to store and analyze data.  ...  Acknowledgment This research is partially funded by the Erasmus Mundus Joint Doctorate in "Information Technologies for Business Intelligence -Doctoral College (IT4BI-DC)".  ... 
doi:10.1007/978-3-662-46839-5_8 fatcat:viwmlikm7rfmfocuhtk34kqbhi

Multidimensional Enrichment of Spatial RDF Data for SOLAP – Full Version [article]

Nurefsan Gür, Torben Bach Pedersen, Katja Hose, Mikael Midtgaard
2020 arXiv   pre-print
The RDF Data Cube (QB) and QB4OLAP vocabularies have been widely used for annotating and publishing statistical and multidimensional RDF data.  ...  Large volumes of spatial data and multidimensional data are being published on the Semantic Web, which has led to new opportunities for advanced analysis, such as Spatial Online Analytical Processing (  ...  enrichment and MD analysis (OLAP-like analysis over RDF data).  ... 
arXiv:2002.06608v1 fatcat:hluzh6svhffjjccqbjif52jayq

Publishing OLAP Cubes on the Semantic Web [chapter]

Alejandro Vaisman
2016 Lecture Notes in Business Information Processing  
OLAP analysis -Link MD data to related datasets and concepts (e.g., Dbpedia, Open Street Maps, etc.) • Represent multidimensional data using Semantic Web standards (eg: RDF, RDF-S) -Publish and share  ...  • Turtle: Syntax to make RDF more readable • Basically a textual representation of an RDF graph • We can use a unique base: @base <http://musicbrainz.org/>. 7/6/2015 DW & OLAP on the Semantic  ...  DW & OLAP on the Semantic Web nw:stateName a qb4o:LevelAttribute ; rdfs:label "State Name"@en ; rdfs:range xsd:string . nw:englishStateName a qb4o:LevelAttribute ; rdfs:label "English State Name"@en ;  ... 
doi:10.1007/978-3-319-39243-1_2 fatcat:lhcif5ej3nftpoub6es25ihdae

Multidimensional enrichment of spatial RDF data for SOLAP

Nurefşan Gür, Torben Bach Pedersen, Katja Hose, Mikael Midtgaard, Boyan Brodaric
2021 Semantic Web Journal  
The RDF Data Cube (QB) and QB4OLAP vocabularies have been widely used for annotating and publishing statistical and multidimensional RDF data.  ...  Large volumes of spatial data and multidimensional data are being published on the Semantic Web, which has led to new opportunities for advanced analysis, such as Spatial Online Analytical Processing (  ...  for Independent Research (DFF) under grant agreement no.  ... 
doi:10.3233/sw-210423 fatcat:icj6rcryyzczdb54f5fupadwru

Semantic Metadata for Supporting Exploratory OLAP [article]

Jovan Varga
2016 Ph.d.-serien for Det Teknisk-Naturvidenskabelige Fakultet, Aalborg Universitet  
This research has been funded by the European Commission through the Erasmus Mundus Joint Doctorate "Information Technologies for Business Intelligence -Doctoral College" (IT4BI-DC) and it has been partly  ...  Acknowledgments This research has been funded by the European Commission through the Erasmus Mundus Joint Doctorate "Information Technologies for Business Intelligence -Doctoral College" (IT4BI-DC) and  ...  for OLAP analysis; and (2) performing OLAP-like analysis directly over SW data, e.g., over MD data represented in RDF.  ... 
doi:10.5278/vbn.phd.engsci.00172 fatcat:2jvgnvvmznh7dk7dap2aipiiii

Enhancing OLAP Analysis with Web Cubes [chapter]

Lorena Etcheverry, Alejandro A. Vaisman
2012 Lecture Notes in Computer Science  
We introduce Open Cubes, an RDFS vocabulary for the specification and publication of multidimensional cubes on the Semantic Web, and show how classical OLAP operations can be implemented over Open Cubes  ...  External data (particularly web data), may be useful to enhance local analysis. In this paper we discuss the extraction of multidimensional data from web sources, and their representation in RDFS.  ...  This work has been partially funded by the LACCIR Project "Monitoring Protected Areas using an OLAP-enabled Spatio-Temporal Geographic Information System".  ... 
doi:10.1007/978-3-642-30284-8_38 fatcat:6jmwidzd4bfj7hcdb7aifgtxeq

Visualizing RDF Data Cubes Using the Linked Data Visualization Model [chapter]

Jiří Helmich, Jakub Klímek, Martin Nečaský
2014 Lecture Notes in Computer Science  
Recently, the RDF Data Cube Vocabulary became a W3C recommendation and at the same time interesting datasets using it started to appear.  ...  The Linked Data Visualisation Model is a formalism focused on this area and is implemented by Payola, a framework for analysis and visualization of Linked Data.  ...  In this paper we only consider RDF data sources such as RDF files or SPARQL endpoints, e.g. DBPedia.  ... 
doi:10.1007/978-3-319-11955-7_50 fatcat:brdihq25orafxelnllonlm2ekm

QB4MobOLAP: A Vocabulary Extension for Mobility OLAP on the Semantic Web

Irya Wisnubhadra, Safiza Kamal Baharin, Nurul A. Emran, Djoko Budiyanto Setyohadi
2021 Algorithms  
However, current SW technologies support advanced analysis only for multidimensional data warehouses and Online Analytical Processing (OLAP) over static spatial and non-spatial SW data.  ...  This article introduces the QB4MobOLAP vocabulary, which enables the analysis of mobility data stored in RDF cubes. This article defines Mobility OLAP operators and SPARQL user-defined functions.  ...  Users can publish Mobility multidimensional RDF data using the QB4MobOLAP Vocabulary. Thus, users can query from RDF endpoints using SPARQL's Mobility OLAP operators.  ... 
doi:10.3390/a14090265 fatcat:frj6asekqjfuvd5cvz6pqej2zq

Dimensional Enrichment of Statistical Linked Open Data

Jovan Varga, Alejandro Vaisman, Oscar Romero, Lorena Etcheverry, Torben Pedersend, Christian Thomsen
2016 Social Science Research Network  
On-Line Analytical Processing (OLAP) is a data analysis technique typically used for local and well-prepared data.  ...  There is already a considerable amount of statistical linked open data sets published using the RDF Data Cube Vocabulary (QB) which is designed for these purposes.  ...  Acknowledgments This research has been funded by the European Commission through the Erasmus Mundus Joint Doctorate "Information Technologies for Business Intelligence -Doctoral College" (IT4BI-DC) and  ... 
doi:10.2139/ssrn.3199266 fatcat:krbhlursgbd4joxelnnrjo4fl4

Dimensional enrichment of statistical linked open data

Jovan Varga, Alejandro A. Vaisman, Oscar Romero, Lorena Etcheverry, Torben Bach Pedersen, Christian Thomsen
2016 Journal of Web Semantics  
On-Line Analytical Processing (OLAP) is a data analysis technique typically used for local and well-prepared data.  ...  There is already a considerable amount of statistical linked open data sets published using the RDF Data Cube Vocabulary (QB) which is designed for these purposes.  ...  Acknowledgments This research has been funded by the European Commission through the Erasmus Mundus Joint Doctorate "Information Technologies for Business Intelligence -Doctoral College" (IT4BI-DC) and  ... 
doi:10.1016/j.websem.2016.07.003 fatcat:rghuepxvxvcfzbwak554ye52pa
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