Filters








108 Hits in 1.8 sec

Triplifying Equivalence Set Graphs

Luigi Asprino, Wouter Beek, Paolo Ciancarini, Frank van Harmelen, Valentina Presutti
2019 International Semantic Web Conference  
In order to handle large-scale semantic analyses on commodity hardware such as regular laptops we introduced [1] a novel data structure called Equivalence Set Graph (ESG).  ...  ESGs are built by a procedure presented in [1] that delivers graphs as a set of maps storing nodes and edges.  ...  Introducing Equivalence Set Graphs An Equivalence Set Graph (ESG) is a tuple V, E, p eq , p sub , p e , p s . The nodes V of an ESG are equivalence sets of terms from the universe of discourse.  ... 
dblp:conf/semweb/AsprinoBCHP19 fatcat:wwi2kvgiovabbcy6vrosurajfu

FAIR-IFICATION OF STRUCTURED CLINICAL DATA [article]

Varsha Gouthamchand, Andre Dekker, Leonard Wee, Johan van Soest
2021 medRxiv   pre-print
The annotations include new meaningful predicates and class equivalencies from pre-defined ontologies which add semantics to the flat RDF triples from the Triplifier.  ...  New class equivalencies from NCIT in annotations graph instead of the flat triples in Triplifier's output. (C25364 -NCIT CODE FOR PATIENT IDENTIFIER) Fig 8 . 8 Fig 8. Visualization Dashboard .  ... 
doi:10.1101/2021.07.23.21261032 fatcat:p4qdenjjz5er7hc552lkqubhmi

Publishing and Consuming Provenance Metadata on the Web of Linked Data [chapter]

Olaf Hartig, Jun Zhao
2010 Lecture Notes in Computer Science  
The World Wide Web evolves into a Web of Data, a huge, globally distributed dataspace that contains a rich body of machineprocessable information from a virtually unbound set of providers covering a wide  ...  A set of RDF triples is called an RDF graph. The predicate in an RDF triple specifies how subject and object of the triple are related.  ...  For instance, the Actor class is defined to be equivalent to the Agent class in the FOAF vocabulary.  ... 
doi:10.1007/978-3-642-17819-1_10 fatcat:2q4bjhvehrbzxbmlopvi5vohv4

A Review on RDB to RDF Mapping for Semantic Web

Sitharamulu V, Raveendra Babu B
2016 International Journal in Foundations of Computer Science & Technology  
Triplify: In Triplify mapping out of 15 only 10 characteristic i.e.  ...  Static Metadata (C10): The meta-data is used to describe RDF components which don't have the equivalent in RDB.  ... 
doi:10.5121/ijfcst.2016.6203 fatcat:cckocvbjinaujmct2ypd3e5cze

Improving response time of database systems by semantification of relational data

Mustafa YENİAD, Yakup KUTLU
2016 Turkish Journal of Electrical Engineering and Computer Sciences  
By comparing the response time for performing SQL queries and equivalent SPARQL queries such as select, insert, update, and delete, operations hold in the semantic data repository was performed.  ...  The core structure of the abstract RDF syntax is a set of triples, each consisting of a subject, a predicate, and an object. A set of such triples is called an RDF graph.  ...  An example of an RDF data set. Subject Predicate Object stuff280110 givenName Elif stuff280110 familyName YENIAD Figure 2 visualizes the RDF data set in Table 1 as RDF graph instances.  ... 
doi:10.3906/elk-1501-89 fatcat:r5yayodk5jdvbdud4oddruafuy

StdTrip: Promoting the Reuse of Standard Vocabularies in Open Government Data [chapter]

Percy Salas, José Viterbo, Karin Breitman, Marco Antonio Casanova
2011 Linking Government Data  
The publication of Open Government Data (OGD) -following the Linked Data standard -requires that a myriad of public information datasets be converted to a set of RDF triples.  ...  Although the construction of this vocabulary is extremely important -because the more one reuses well known standards, the easier it will be to interlink the result to other existing datasets -most triplifying  ...  result (typically the result is an RDF graph); • Dump access, which means the agent performs an HTTP GET on dump of the entire RDF graph, for example in Extract, Transform, and Load (ETL) processes.  ... 
doi:10.1007/978-1-4614-1767-5_6 fatcat:nqb3mhujcndqta7ehcx2bj36uu

Triplificating and linking XBRL financial data

Roberto García, Rosa Gil
2010 Proceedings of the 6th International Conference on Semantic Systems - I-SEMANTICS '10  
One of the main ways of populating the Web of Data is by triplifying existing data sources.  ...  INTRODUCTION The main way to populate the Web of Data is by triplifying existing data sources.  ...  The resulting RDF graph model contains all that we can obtain from the XML tree.  ... 
doi:10.1145/1839707.1839711 dblp:conf/i-semantics/GarciaG10 fatcat:pjhicxl2xnflvd34tanoskr4aa

Surfacing scientific and financial data with the Xcel2RDF plug-in

Marcia Lucas Pesce, Karin K. Breitman, Marco Antonio Casanova
2012 2012 Second International Workshop on Developing Tools as Plug-Ins (TOPI)  
Finally, as a proof of concept, the paper illustrates how to use the tool to triplify statistical data.  ...  RDF offers three equivalent notations: RDF triples, RDF graphs, and RDF/XML. The RDF triples notation translates RDF statements directly into character strings.  ...  However, most of them focuses on the conversion of relational data, such as Triplify [4] , Virtuoso RDF views [19] and D2RQ [20] . Tools that triplify spreadsheets are less popular.  ... 
doi:10.1109/topi.2012.6229814 dblp:conf/icse/PesceBC12 fatcat:zu2x73strbc23cp3674zo4hifa

Facade-X: An Opinionated Approach to SPARQL Anything [chapter]

Enrico Daga, Luigi Asprino, Paul Mulholland, Aldo Gangemi
2021 Applications and Practices in Ontology Design, Extraction, and Reasoning  
Let Q be the set of all possible queries, G the set of all possible graphs, N the set of all possible graph names, R the set of all possible resources and DS the set of all data sources (found in the resources  ...  We define: (i) D as a collection of named graphs (i.e.  ... 
doi:10.3233/ssw210035 fatcat:yzr2lo2zjzadtjboappzqdh6wy

E-Assessment Data Compatibility Resolution Methodology with Bidirectional Data Transformation

2017 Eurasia Journal of Mathematics, Science and Technology Education  
A SQL SELECT query is used to translate dataset found in database into a set of triples. Whereas, SQL DDL forms a syntax level aspect of view.  ...  D2RQ (Bizer & Seaborne, 2004; Cyganiak, Bizer, Garbers, Maresch, & Becker, 2012 ) is used to transform RDB based data into virtual RDF graphs.  ... 
doi:10.12973/eurasia.2017.00767a fatcat:eowtz6k4ovc75pkmmigbvt6v3m

Facade-X: an opinionated approach to SPARQL anything

Enrico Daga, Luigi Asprino, Paul Mulholland, Aldo Gangemi
2021 Zenodo  
Let Q be the set of all possible queries, G the set of all possible graphs, N the set of all possible graph names, R the set of all possible resources and DS the set of all data sources.  ...  × G); (iii) F is a set of functions where each f ∈ F associates a data source (ds ∈ DS) and a query (q ∈ Q) with a graph g ∈ G.  ... 
doi:10.5281/zenodo.4927536 fatcat:jiovb4qdb5b4pldredy5klvvga

Different RDB to RDF mapping languages

Priyanka Shukla, Vaibhav Singh, Akanksha Shukla
2014 International Journal of Computer Applications Technology and Research  
A direct mapping is query preserving if every query over a relational database can be translated into an equivalent query over the RDF graph resulting from the mapping.It assures that every relational  ...  Sahoo et al. has discussed different methods to generate mappings between RDB and RDF which are basically of two categories:Automatic Mapping Generation: This discusses a set of mappings between RDB and  ... 
doi:10.7753/ijcatr0306.1011 fatcat:tfciv4tijzhrfgs6nrv6kvm2su

Provenance Representation and Storage Techniques in Linked Data: A State-of-the-art Survey

Ujjal Marjit, Kumar Sharma, Utpal Biswas
2012 International Journal of Computer Applications  
A recommendation has been made to generate the provenance of Linked Data in the equivalent way as we publish the Linked Data into the Web of Data.  ...  It is depicted a set of provenance principles proposed by Edoardo Pignotti et al.  ... 
doi:10.5120/4637-6889 fatcat:nygilzlzvjbwdggqgbn56dmsom

Semantic SPARQL Query in a Relational Database Based on Ontology Construction

Mohamed A. G. Hazber, Ruixuan Li, Xiwu Gu, Guandong Xu, Yuhua Li
2015 2015 11th International Conference on Semantics, Knowledge and Grids (SKG)  
Then we rewriting SPARQL query from SQL by translating SQL relational algebra into an equivalent SPARQL.  ...  Io is a set of triples 1 ,..., m tt of the graph r gr over CLS that denoted by 1 ( ) { ,..., } m Io CLS t t  , Where the P stands for an expression condition in the set       ...  Cyganiak [22] discussed the transformation of SPARQL to relational algebra and outlines a set of rules to establish the equivalence between this algebra and SQL.  ... 
doi:10.1109/skg.2015.14 dblp:conf/skg/HazberLGXL15 fatcat:cvu2wuet3zenjh54itibcoo3wy

R2D: A Bridge between the Semantic Web and Relational Visualization Tools

Sunitha Ramanujam, Anubha Gupta, Latifur Khan, Steven Seida, Bhavani Thuraisingham
2009 2009 IEEE International Conference on Semantic Computing  
R2D aims to transform RDF data, at run-time, into an equivalent normalized relational schema, thereby bridging the gap between RDF and RDBMS concepts and making the abundance of existing relational tools  ...  Performance graphs and screen-shots of a relational visualization tool that uses R2D to access RDF data are presented as evidence of the feasibility of our research.  ...  Our contributions in this paper are: • We propose a mapping scheme for the translation of RDF Graph structures to an equivalent normalized relational schema that extends the work in [6] by including  ... 
doi:10.1109/icsc.2009.29 dblp:conf/semco/RamanujamGKST09 fatcat:oyx42pk6qngwbla74giskbassq
« Previous Showing results 1 — 15 out of 108 results