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R2RML and RML Comparison for RDF Generation, their Rules Validation and Inconsistency Resolution [article]

Anastasia Dimou
2020 arXiv   pre-print
We look into details on their differences and explain how knowledge graphs, in the form of RDF graphs, can be generated with each one of the two mapping languages.  ...  In this paper, an overview of the state of the art on knowledge graph generation is provided, with focus on the two prevalent mapping languages: the W3C recommended R2RML and its generalisation RML.  ...  A Triples Map refers to a certain Logical Table specified by its name RML A Logical Source (rml:LogicalSource) extends R2RMLs Logical Table and defines the data source to be used for the knowledge graph  ... 
arXiv:2005.06293v1 fatcat:lv2lolnkrbdvhmcjzsx6ij3ys4

Chapter 4 Creation of Knowledge Graphs [chapter]

Anastasia Dimou
2020 Lecture Notes in Computer Science  
After reading this chapter, the reader should have an understanding of the different solutions available to generate Knowledge Graphs and should be able to choose the mapping language that best suits a  ...  The goal is to gain an overview of different approaches that were proposed and find out more details about the current prevalent ones.  ...  In the remainder of this chapter, we introduce the Relational to RDF Mapping Language (R2RML) [97] and the RDF Mapping Language (RML) [111] which was the first mapping language extending R2RML to support  ... 
doi:10.1007/978-3-030-53199-7_4 fatcat:qc3277a2jbfkxlp3i53z4lfp3i

Mapping Hierarchical Sources into RDF Using the RML Mapping Language

Anastasia Dimou, Miel Vander Sande, Jason Slepicka, Pedro Szekely, Erik Mannens, Craig Knoblock, Rik Van de Walle
2014 2014 IEEE International Conference on Semantic Computing  
This paper describes a novel approach of mapping heterogeneous and hierarchical data sources into RDF using the RML mapping language, an extension over R2RML (the W3C standard for mapping relational databases  ...  A use case shows how RML facilitates the mapping rules' definition and execution to map several heterogeneous sources.  ...  In 2012, the "R2RML: RDB to RDF Mapping Language" 1 became a W3C recommendation, standardizing a language for mapping relational databases to RDF.  ... 
doi:10.1109/icsc.2014.25 dblp:conf/semco/DimouSSSMKW14 fatcat:ils6wm5lkraxljtyuixx4tixve

Translation of Heterogeneous Databases into RDF, and Application to the Construction of a SKOS Taxonomical Reference [chapter]

Franck Michel, Loïc Djimenou, Catherine Faron-Zucker, Johan Montagnat
2016 Lecture Notes in Business Information Processing  
It extends R2RML, the W3C recommendation for the mapping of relational databases to RDF, and relies on RML for the handling of various data formats.  ...  The xR2RML mapping language is an endeavor towards this goal: it is designed to map various types of databases to RDF, by flexibly adapting to heterogeneous query languages and data models while remaining  ...  R2RML [2] , for instance, is the W3C recommendation to describe RDB-to-RDF mappings. RML extends R2RML for the integration of heterogeneous data formats [3] .  ... 
doi:10.1007/978-3-319-30996-5_14 fatcat:4qvcwoicgvhivpeqt32z73mp4i

Translation of Relational and Non-relational Databases into RDF with xR2RML

Franck Michel, Loïc Djimenou, Catherine Faron-Zucker, Johan Montagnat
2015 Proceedings of the 11th International Conference on Web Information Systems and Technologies  
It extends R2RML, the W3C recommendation for the mapping of relational databases to RDF, and relies on RML for the handling of various data representation formats.  ...  In this paper we present xR2RML, a language designed to describe the mapping of various types of databases to RDF. xR2RML flexibly adapts to heterogeneous query languages and data models while remaining  ...  To help in the design of xR2RML we chose to leverage R2RML, a standard, well-adopted mapping language for relational databases.  ... 
doi:10.5220/0005448304430454 dblp:conf/webist/MichelDFM15 fatcat:eyt5xc7wqvamlinua4n3yzslue

GeoTriples: Transforming Geospatial Data into RDF Graphs Using R2RML and RML Mappings

Kostis Kyzirakos, Dimitrianos Savva, Ioannis Vlachopoulos, Alexandros Vasileiou, Nikolaos Karalis, Manolis Koubarakis, Stefan Manegold
2018 Social Science Research Network  
A lot of geospatial  ...  The Mapping Language R2RML A language for expressing customized mappings from relational databases to RDF graphs is the R2RML mapping language that became W3C recommendation in 2012 [14] .  ...  Extending the Mapping Languages R2RML and RML for Geospatial Data Much work has been done recently on extending RDF to represent and query geospatial information.  ... 
doi:10.2139/ssrn.3248492 fatcat:hvuz2cpkjbeaxog6cqbb2ckcsy

MappingPedia: A Collaborative Environment for R2RML Mappings [chapter]

Freddy Priyatna, Edna Ruckhaus, Nandana Mihindukulasooriya, Oscar Corcho, Nelson Saturno
2017 Lecture Notes in Computer Science  
We present a demo of MappingPedia, a collaborative environment for storing and sharing R2RML mappings.  ...  Most of these mappings are kept locally in each organization, and to the best to our knowledge, a shared repository that would facilitate the discovery, registration, execution, request and analysis of  ...  MappingPedia is a tool to support collaborative mapping development and is independent of a specific editing approach.  ... 
doi:10.1007/978-3-319-70407-4_22 fatcat:s3y3ajytyva2tgdykitxhxygme

GeoTriples: Transforming geospatial data into RDF graphs using R2RML and RML mappings

Kostis Kyzirakos, Dimitrianos Savva, Ioannis Vlachopoulos, Alexandros Vasileiou, Nikolaos Karalis, Manolis Koubarakis, Stefan Manegold
2018 Journal of Web Semantics  
In this paper we present the open source tool GeoTriples which generates and processes extended R2RML and RML mappings that transform geospatial data from many input formats into RDF.  ...  vocabularies like GeoSPARQL and stSPARQL, but without being tightly coupled to a specific vocabulary.  ...  The mapping language R2RML A language for expressing customized mappings from relational databases to RDF graphs is the R2RML mapping language that became W3C recommendation in 2012 [17].  ... 
doi:10.1016/j.websem.2018.08.003 fatcat:frayuscv45ay5iyqdbkzsmewr4

Mapping Spatiotemporal Data to RDF: A SPARQL Endpoint for Brussels

Alejandro Vaisman, Kevin Chentout
2019 ISPRS International Journal of Geo-Information  
Data are provided as relational tables or XML documents and are mapped into the RDF data model using R2RML, a standard language that allows defining customized mappings from relational databases to RDF  ...  The first part of the paper describes how R2RML is adapted to allow producing spatial RDF data and to support XML data sources.  ...  Acknowledgments: Alejandro Vaisman was partially funded by the OSCB (Open Semantic Cloud for Brussels) project, financed by Innoviris.  ... 
doi:10.3390/ijgi8080353 fatcat:nqqilsrrmvextdrehyhxyjwqsa

Conformance Test Cases for the RDF Mapping Language (RML) [chapter]

Pieter Heyvaert, David Chaves-Fraga, Freddy Priyatna, Oscar Corcho, Erik Mannens, Ruben Verborgh, Anastasia Dimou
2019 Communications in Computer and Information Science  
RML is an extension of the W3C-recommended R2RML language, extending support from relational databases to other data sources, such as data in CSV, XML, and JSON format.  ...  An R2RML processor is a tool that, given a set of R2RML rules and a relational database, generates an RDF dataset.  ...  Logical Source A Logical Source extends R2RML's Logical Table and describes the input data source used to generate the RDF.  ... 
doi:10.1007/978-3-030-21395-4_12 fatcat:otw3sct73vao3h3ysdf4ft4qke

A Survey on Semantic Sensor Web: Sensor Ontology, Mapping and Query

Xiaoming Zhang, Mei Li
2015 International Journal of u- and e- Service, Science and Technology  
Meanwhile, the comparison criteria for the ontologies are given. Mapping methods which from stream data to the ontology are analyzed and the mapping languages are compared.  ...  Secondly, we discuss the mapping from the stream data to ontology and focus on the comparison of the mapping languages in order to find out the best mapping method of SSW.  ...  RML is defined as a superset of the W3C-standardized mapping language, R2RML, that maps data in relational databases to the RDF data model.  ... 
doi:10.14257/ijunesst.2015.8.10.32 fatcat:d2nksllpkrcufi4l72x7fnzk3a

A Review on RDB to RDF Mapping for Semantic Web

Sitharamulu V, Raveendra Babu B
2016 International Journal in Foundations of Computer Science & Technology  
There is a definite need for improvement in technologies for efficient mapping languages from RDB to RDF in semantic web.  ...  The data stored in RDB is to be efficiently mapped to the semantic web or RDF for data availability to the users.  ...  R2RML: The ongoing mapping language for standardization of theW3C RDB2RDFWG for RDB-to-RDF mappings is R2RML [16] .  ... 
doi:10.5121/ijfcst.2016.6203 fatcat:cckocvbjinaujmct2ypd3e5cze

Rules and Ontology Based Data Access [chapter]

Guohui Xiao, Martin Rezk, Mariano Rodríguez-Muro, Diego Calvanese
2014 Lecture Notes in Computer Science  
In OBDA an ontology defines a high level global vocabulary for user queries, and such vocabulary is mapped to (typically relational) databases.  ...  To the best of our knowledge, this results in the first system supporting all of the following W3C standards: the OWL 2 QL ontology language, R2RML mappings, SWRL rules with linear recursion, and SPARQL  ...  We thank Héctor Pérez-Urbina for his support in evaluating Stardog.  ... 
doi:10.1007/978-3-319-11113-1_11 fatcat:uqm6evalvjfy3ffrn4qpfxem54

A comparison of RDB-to-RDF mapping languages

Matthias Hert, Gerald Reif, Harald C. Gall
2011 Proceedings of the 7th International Conference on Semantic Systems - I-Semantics '11  
It should act as a guide in selecting a RDB-to-RDF mapping language for a given application scenario and its requirements w.r.t. mapping features.  ...  It should act as a guide in selecting a RDB-to-RDF mapping language for a given application scenario and its requirements w.r.t. mapping features.  ...  The goal is to define a vendor-independent mapping language for read-only data access. R3M: R3M [24] is the mapping language of the OntoAccess 4 mediation platform [22] .  ... 
doi:10.1145/2063518.2063522 dblp:conf/i-semantics/HertRG11 fatcat:xt5juel7t5b2pflru7isotxygy

Declarative Data Transformations for Linked Data Generation: The Case of DBpedia [chapter]

Ben De Meester, Wouter Maroy, Anastasia Dimou, Ruben Verborgh, Erik Mannens
2017 Lecture Notes in Computer Science  
We employ an alignment of data transformations described using the Function Ontology (fno) and mapping of data to Linked Data described using the rdf Mapping Language (rml).  ...  Since complex data transformations remain out of scope for mapping languages, these steps are often implemented as custom solutions, or with systems separate from the mapping process.  ...  The RDF Mapping Language (RML) r2rml [7] is the w3c-recommended mapping language for defining mappings of data in relational databases to the rdf data model.  ... 
doi:10.1007/978-3-319-58451-5_3 fatcat:aielaatqyzdxppirfkxm5s7bme
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