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Exploratory querying of SPARQL endpoints in space and time

Simon Scheider, Auriol Degbelo, Rob Lemmens, Corné van Elzakker, Peter Zimmerhof, Nemanja Kostic, Jim Jones, Gautam Banhatti, Aba-Sah Dadzie, Emmanuel Pietriga, Aba-Sah Dadzie, Emmanuel Pietriga
2016 Semantic Web Journal  
We propose design principles for SPEX (Spatio-temporal content explorer), a tool which helps people unfamiliar with the content of SPARQL endpoints or their syntax to explore the latter in space and time  ...  First, one has to know the semantic concepts and the type of knowledge contained in an endpoint a-priori in order to query content effectively.  ...  Furthermore, we thank all participants of our user test for letting us peek over their shoulders.  ... 
doi:10.3233/sw-150211 fatcat:vjkzeni2ezbtthjzgpmvv2uqpy

Exploratory Search on the Top of DBpedia Chapters with the Discovery Hub Application [chapter]

Nicolas Marie, Fabien Gandon, Myriam Ribière
2013 Lecture Notes in Computer Science  
Discovery Hub is an exploratory search engine that helps users explore topics of interests for learning and leisure purposes.It makes use of a semantic spreading activation algorithm coupled with a sampling  ...  It allowsprocessing the linked data onthe-flyi.e. withoutany pre-processing and offers flexibility in the choice of the SPARQL endpoint and explanation mechanisms.  ...  This flexibility in the choice of the SPARQL endpoint addressed is an advantage offered by the absence of preprocessing.  ... 
doi:10.1007/978-3-642-41242-4_45 fatcat:vbzecuxqwjep5opx3p4qmta6li

Exploratory Search on the Top of DBpedia Chapters with the Discovery Hub Application [chapter]

Nicolas Marie, Fabien Gandon, Damien Legrand, Myriam Ribière
2013 Lecture Notes in Computer Science  
Discovery Hub is an exploratory search engine that helps users explore topics of interests for learning and leisure purposes.It makes use of a semantic spreading activation algorithm coupled with a sampling  ...  It allowsprocessing the linked data onthe-flyi.e. withoutany pre-processing and offers flexibility in the choice of the SPARQL endpoint and explanation mechanisms.  ...  This flexibility in the choice of the SPARQL endpoint addressed is an advantage offered by the absence of preprocessing.  ... 
doi:10.1007/978-3-642-41242-4_21 fatcat:rxapjegj3rgyvkst4frntz64sa

SPARQL Playground: A Block Programming Tool to Experiment with SPARQL

Paolo Bottoni, Miguel Ceriani
2015 International Semantic Web Conference  
the syntax of SPARQL and the model of the data in the endpoint (vocabularies and semantics).  ...  As the block programming paradigm has been succesfully used to teach programming skills, we propose a tool that allows users to build and run SPARQL queries on an endpoint without previous knowledge of  ...  The SPARQL execution block listens for changes in its query connection; each time the query changes, the corresponding SPARQL query is generated and sent to a SPARQL endpoint.  ... 
dblp:conf/semweb/BottoniC15 fatcat:46673p56kbch5pfgwl56c2rhvu

Exploratory Patent Search With Faceted Search And Configurable Entity Mining

Pavlos Fafalios, Michail Salampasis, Yannis Tzitzikas
2013 Zenodo  
We propose an exploratory strategy for patent search that exploits the metadata already available in patents in addition to the results of clustering and entity mining that are performed at query time.  ...  In addition, we propose the exploitation of Linked Data for specifying the entities of interest and for providing further information about the identified entities.  ...  Time for exploring an entity The time for exploring an entity (by querying the LOD cloud) highly depends on the SPARQL endpoint (i.e. the underlying knowledge base) and the SPARQL template query.  ... 
doi:10.5281/zenodo.7749 fatcat:mc6gwcj73ndidb7u3kyhd6xgy4

Explorator: A tool for exploring RDF data through direct manipulation

Samur Araújo, Daniel Schwabe
2009 The Web Conference  
In this paper we introduce Explorator, a tool for exploring the Semantic Web data by direct manipulation.  ...  Consequently, it is well suited for tasks that involve information search, exploration and visualization.  ...  Another way to access SW data is by querying a SPARQL Endpoint that receives a SPARQL 12 query and returns a set of RDF resources described in XML notation.  ... 
dblp:conf/www/AraujoS09 fatcat:4jxqarjv7rdjpfd4fkrc2lut5q

Optimizing Analytical Queries over Semantic Web Sources [article]

Dilshod Ibragimov
2017 PhD series, Technical Faculty of IT and Design, ˜Aalborg=ålborgœ University  
[74] addresses this problem in relational systems by proposing a cost model leading to a tradeoff between space consumption and query response time for an arbitrary set of queries.  ...  Processing analytical queries in the context of Linked Data and federations of SPARQL endpoints has been studied in [69, 70] .  ... 
doi:10.5278/vbn.phd.tech.00022 fatcat:5d2lmnicazgmze2qhe5cikowwm

Sparklis: An expressive query builder for SPARQL endpoints with guidance in natural language

Sébastien Ferré, Eero Hyvönen
2016 Semantic Web Journal  
SPARKLIS is a Semantic Web tool that helps users explore and query SPARQL endpoints by guiding them in the interactive building of questions and answers, from simple ones to complex ones.  ...  Queries are verbalized in either English or French, so that no knowledge of SPARQL is ever necessary.  ...  We thank the reviewers for their insightful suggestions that helped to improve this paper, in particular the evaluation section.  ... 
doi:10.3233/sw-150208 fatcat:h5yxk3n7cvhr7iltxvj3wqodue

Exploratory Professional Search through Semantic Post-Analysis of Search Results [chapter]

Pavlos Fafalios, Yannis Tzitzikas
2014 Lecture Notes in Computer Science  
For helping the user to get efficiently a concise overview, to quickly restrict the search space and to make sense of the results, in this article we present an exploratory strategy for professional search  ...  The described strategy can exploit the metadata that are already available, as well as the results of textual clustering and entity mining that can be performed at query time.  ...  entity by querying one or more SPARQL endpoints.  ... 
doi:10.1007/978-3-319-12511-4_9 fatcat:xaprsqtxabhlddurfhmi5fspga

A Framework for Exploration and Visualization of SPARQL Endpoint Information

Maria Krommyda
2020 International Journal of Graph Computing  
We present here an integrated platform that supports the users to the querying, exploration and visualization of information contained in SPARQL endpoints.  ...  The SPARQL query language alleviates this barrier by facilitating the exploration of this information and many data providers have created dedicated SPARQL endpoints for their data.  ...  Acknowledgment The experimental analysis presented in Section 6 was supported by Mr. Tara Venkata Sai Rahul Muktineni as part of his Master Project for the University of Ottawa.  ... 
doi:10.35708/gc1868-126723 fatcat:nc5n6fwkjne2rofkajcpz4oczu

Composite interests' exploration thanks to on-the-fly linked data spreading activation

Nicolas Marie, Olivier Corby, Fabien Gandon, Myriam Ribière
2013 Proceedings of the 24th ACM Conference on Hypertext and Social Media - HT '13  
We propose to address the case of mixed interests' exploration in the form of composite queries (several unitary interests combined) e.g. exploring results and make discoveries related to both The Beatles  ...  Consequently this method offers a high level of flexibility for querying and allows, among others, the expression of composite interests' queries on remote linked data sources.  ...  Another possible research direction is to query several SPARQL endpoints at the same times (e.g. French, Spanish, and Italian DBpedias), build one meta-lingual graph and retrieve richer results.  ... 
doi:10.1145/2481492.2481496 dblp:conf/ht/MarieCGR13 fatcat:cfme7ue7irgjfdo2eh62jdkrza

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

Sébastien Ferré
2014 Lecture Notes in Computer Science  
Queries are now verbalized in English, so that no knowledge of SPARQL is ever necessary.  ...  All of this is implemented in a portable Web application, Sparklis 1 , and has been evaluated on many endpoints and questions.  ...  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

Improved Dataset Coverage and Interoperability with Bio2RDF Release 2

Alison Callahan, Jose Cruz-Toledo, Peter Ansell, Dana Klassen, Giovanni Tumarello, Michel Dumontier
2012 Workshop on Semantic Web Applications and Tools for Life Sciences  
RDF data files and Virtuoso SPARQL endpoints.  ...  We describe dataset connectivity, assisted SPARQL queries with context-aware SPARQLed, and mashup capability using the Sig.ma search engine.  ...  It can also inform the construction of an immediately useful SPARQL query, without losing time generating "exploratory" queries to become familiar with the dataset model.  ... 
dblp:conf/swat4ls/CallahanCAKTD12 fatcat:yx3wbviwnjgm5k5n2lo75td5uy

An Adaptive Faceted Search Interface for Structured Product Offers on the Web

Alex Stolz, Martin Hepp
2015 International Semantic Web Conference  
, and by the search process that involves learning about the option space.  ...  Our search interface is directly based on the popularity of schema elements in the data and does not rely on a rigid conceptual schema with hardwired product features, thereby being suitable for arbitrary  ...  The authors would like to thank Florian Ott for the kind support in setting up and hosting the infrastructure of our search prototype.  ... 
dblp:conf/semweb/StolzH15a fatcat:gzlpbnkncfg4xmzgflbxeduupa

SparqlBlocks: Using Blocks to Design Structured Linked Data Queries

Miguel Ceriani, Paolo Bottoni
2017 Journal of Visual Languages and Sentient Systems  
a modular and exploratory approach to query design.  ...  By integrating the presentation of queries and results, reuse of results in the refinement of queries is promoted, as well as the exploration of both the data and the structure of Linked Data sources.  ...  The SPARQL execution block listens for changes in its query connection; each time the query changes, the corresponding SPARQL query is generated and sent to a SPARQL endpoint.  ... 
doi:10.18293/vlss2017-006 fatcat:nzacmvtzu5echd77s4ihke4kze
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