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Transforming the JSON Output of SPARQL Queries for Linked Data Clients

Pasquale Lisena, Raphaël Troncy
2018 Companion of the The Web Conference 2018 on The Web Conference 2018 - WWW '18  
In this work, we propose a generic approach implemented in a JavaScript module that takes as input a JSON file describing both the SPARQL query and the shape of the expected output at the same time.  ...  SPARQL endpoints are one possible access method to linked data.  ...  ACKNOWLEDGMENTS This work has been partially supported by the French National Research Agency (ANR) within the DOREMUS Project, under grant number ANR-14-CE24-0020.  ... 
doi:10.1145/3184558.3188739 dblp:conf/www/LisenaT18 fatcat:ctclyajbkjdlfh7q3yfgcgpmxy

Scaling Data Streams With Catmandu And Linked Data Fragments

Ruben Verborgh, Patrick Hochstenbach
2015 Zenodo  
The Linked Data Fragments conceptual framework allows to define more lightweight interfaces, which enable client-side execution of complex queries.  ...  In Catmandu, data streams are expressed as a JSON model that can be queried with the JSONPath query language and transformed with an ETL language called Fix.  ...  In Catmandu, data streams are expressed as a JSON model that can be queried with the JSONPath query language and transformed with an ETL language called Fix.  ... 
doi:10.5281/zenodo.49796 fatcat:vgbzl622jjhmhcd4s3g3gxnudq

Gravsearch: Transforming SPARQL to query humanities data

Tobias Schweizer, Benjamin Geer, Antonis Bikakis, Beatrice Markhoff, Alessandro Mosca, Stephane Jean, Eero Hyvönen
2020 Semantic Web Journal  
It does this by introducing server software that mediates between the client and the triplestore, transforming an input SPARQL query into one or more queries executed by the triplestore.  ...  RDF triplestores have become an appealing option for storing and publishing humanities data, but available technologies for querying this data have drawbacks that make them unsuitable for many applications  ...  Acknowledgements This work was supported by the Swiss National Science Foundation (166072) and the Swiss Data and Service Center for the Humanities.  ... 
doi:10.3233/sw-200386 fatcat:hooqro2axfdgnmwx7u2va7r5pi

Creating RESTful APIs over SPARQL endpoints using RAMOSE [article]

Marilena Daquino, Ivan Heibi, Silvio Peroni, David Shotton
2021 arXiv   pre-print
Through the creation of source-specific textual configuration files, RAMOSE enables the querying of SPARQL endpoints via simple Web RESTful API calls that return either JSON or CSV-formatted data, thus  ...  Semantic Web technologies are widely used for storing RDF data and making them available on the Web through SPARQL endpoints, queryable using the SPARQL query language.  ...  This tool allows one to simplify the JSON outputs of a SPARQL query by re-shaping and simplifying the final JSON schema.  ... 
arXiv:2007.16079v4 fatcat:52vnoh4vwfd7lonj6girygo67m

Enabling Automatic Discovery and Querying of Web APIs at Web Scale using Linked Data Standards

Franck Michel, Catherine Faron-Zucker, Olivier Corby, Fabien Gandon
2019 Companion Proceedings of The 2019 World Wide Web Conference on - WWW '19  
To help in making sense of the ever-increasing number of data sources available on the Web, in this article we tackle the problem of enabling automatic discovery and querying of data sources at Web scale  ...  We apply these principles to the concrete case of SPARQL micro-services that aim at querying Web APIs using SPARQL.  ...  The embedded markup data (exemplified in Listing 6) is generated by a SPARQL CONSTRUCT query whose result is passed to a generic built-in STTL transformation that serializes RDF data in JSON-LD.  ... 
doi:10.1145/3308560.3317073 dblp:conf/www/MichelFCG19 fatcat:efmlsfnh5jcjncsdg3mx4p2zx4

Anno4j - Idiomatic Access to the W3C Web Annotation Data Model [chapter]

Emanuel Berndl, Kai Schlegel, Andreas Eisenkolb, Thomas Weißgerber, Harald Kosch
2016 Lecture Notes in Computer Science  
However, non-Semantic Web experts may struggle to produce the corresponding RDF data or SPARQL queries.  ...  An extensible and modular architecture supports enhancements and use-case specific model alterations, while the plugin functionality of Anno4j allows to enrich querying by adding custom function evaluators  ...  Acknowledgements The presented work was developed within the MICO project partially funded by the EU Seventh Framework Programme, grant agreement number 610480.  ... 
doi:10.1007/978-3-319-47602-5_43 fatcat:fh5rivejz5aaxc72w2fv6uzah4

Open Data Consumption Through the Generation of Disposable Web APIs

Paloma Caceres Garcia De Marina, Jose Maria Cavero Barca, Carlos E. Cuesta, Miguel Angel Garrido, Irene Garrigos, Cesar Gonzalez-Mora, Jose-Norberto Mazon, Almudena Sierra-Alonso, Belen Vela, Jose Jacobo Zubcoff
2021 IEEE Access  
SPARQL endpoints have become very useful for the consumption of open data, but we argue that its steep learning curve hampers open data reuse in situational scenarios.  ...  open data in a situational scenario, thus avoiding the complexity and learning curve of SPARQL and the effort of manually processing the data.  ...  The Prov4J framework includes a Client API that contains key interface methods for a set of provenance queries, thus minimizing the users' interactions with SPARQL.  ... 
doi:10.1109/access.2021.3082182 fatcat:l7g5yzj5izdd3ge5pmvr7fzl4e

Seamless Integration of RESTful Services into the Web of Data

Markus Lanthaler, Christian Gütl
2012 Advances in Multimedia  
It also shows how these descriptions along with an algorithm to translate SPARQL queries to HTTP requests can be used to integrate RESTful services into a global read-write Web of Data.  ...  We live in an era of ever-increasing abundance of data.  ...  The link descriptions contain all the necessary information for a client to retrieve and manipulate instance data.  ... 
doi:10.1155/2012/586542 fatcat:6ic7oaxpnradldqtgchysyncuq

Automatic Bootstrapping of GraphQL Endpoints for RDF Triple Stores

Lars Christoph Gleim, Tim Holzheim, István Koren, Stefan Josef Decker
2020 CEUR Workshop Proceedings  
However, to date, the deployment of available GraphQL processors for RDF data requires users to have intricate knowledge of Semantic Web technologies, such as SPARQL and SHACL, as well as the schema of  ...  GraphQL is a query language for graph-structured Web APIs, increasingly popular among Web developers and recently explored as an alternative query language for Linked Data and its underlying RDF data model  ...  Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy -EXC-2023 Internet of Production -390621612.  ... 
doi:10.18154/rwth-conv-242785 fatcat:ig7ssod575g4rmlkzbb6zxtiyu

A Web-based Platform for Dynamic Integration of Heterogeneous Data

Tuan-Dat Trinh, Peter Wetz, Ba-Lam Do, Amin Anjomshoaa, Elmar Kiesling, A. Min Tjoa
2014 Proceedings of the 16th International Conference on Information Integration and Web-based Applications & Services - iiWAS '14  
Even though many national and international organizations have published their data according to the Linked Data principles, a considerable number of data sources is still available in traditional formats  ...  Whereas the number of open and accessible data sources on the web is growing rapidly, data becomes more heterogeneous and is difficult to use or reuse.  ...  An example is Linked Data Fragments [25] in which the client itself will execute complex SPARQL 4 queries after receiving the necessary data fragments from the server.  ... 
doi:10.1145/2684200.2684291 dblp:conf/iiwas/TrinhWDAKT14 fatcat:7qmg466eq5cftdayfbgwgntsze

Widget-based Exploration of Linked Statistical Data Spaces

Ba-Lam Do, Tuan-Dat Trinh, Peter Wetz, Amin Anjomshoaa, Elmar Kiesling, A. Min Tjoa
2014 Proceedings of 3rd International Conference on Data Management Technologies and Applications  
Although important first steps toward building a web of statistical Linked Datasets have been made, providing adequate facilities for end users to interactively explore and make use of the published data  ...  To increase the value of such data, the W3C recommends the RDF Data Cube Vocabulary to facilitate the publication of data in a more structured and interlinked manner.  ...  Next, widgets return their results in standard JSON-LD (JSON for Linked Data) format (Sporny et al., 2013) , even if the data source only partly complies to the vocabulary.  ... 
doi:10.5220/0005110102820290 dblp:conf/data/DoTWAKT14 fatcat:l2ztyltyazghniw3dwowjvdrqu

TripleWave: Spreading RDF Streams on the Web [chapter]

Andrea Mauri, Jean-Paul Calbimonte, Daniele Dell'Aglio, Marco Balduini, Marco Brambilla, Emanuele Della Valle, Karl Aberer
2016 Lecture Notes in Computer Science  
Twitter and Wikipedia streams) or time-annotated RDF datasets (e.g. the Linked Sensor Data dataset).  ...  Research in these areas has proposed an ecosystem of solutions to query, reason and perform real-time processing over heterogeneous and distributed data streams on the Web.  ...  R2RML mappings allow customizing the transformation from non-RDF streams. The RDF stream output can be pushed or pulled toward the client as a JSON-LD dataset.  ... 
doi:10.1007/978-3-319-46547-0_15 fatcat:yhekoz7vavhsdbwhonp3b5hgim

CRAFTS: Configurable REST APIs For Triple Stores

Guillermo Vega-Gorgojo
2022 IEEE Access  
CRAFTS automatically handles the translation of API calls into SPARQL queries, delivering results in JSON format. Web developers can then use a CRAFTS API to read and write Linked Open Data.  ...  This paper addresses the challenge of accessing Linked Open Data through REST APIs. Configurable REST APIs For Triple Stores (CRAFTS) is the tool devised for this purpose.  ...  Other approaches propose new serializations of Linked Data and SPARQL results to JSON such as JSON-LD [12] and SPARQL transformer [13] .  ... 
doi:10.1109/access.2022.3160610 fatcat:63ksglelbjdphbzizi2r5u75gm

PROVIDING GEOGRAPHIC DATASETS AS LINKED DATA IN SDI

E. Hietanen, L. Lehto, P. Latvala
2016 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
The data for the response is first fetched from existing WFS. Then the Geographic Markup Language (GML) format output of the WFS is transformed on-the-fly to the RDF format.  ...  <br><br> A solution for linking data objects to the dataset URI is also introduced by using the Vocabulary of Interlinked Datasets (VoID).  ...  The idea of the adapter is that WFS requests are translated to SPARQL queries and the query results are then transformed to WFS XML documents, which are returned to the client.  ... 
doi:10.5194/isprs-archives-xli-b2-583-2016 fatcat:egetjxvt6vaann73emyyewza6m

PROVIDING GEOGRAPHIC DATASETS AS LINKED DATA IN SDI

E. Hietanen, L. Lehto, P. Latvala
2016 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
The data for the response is first fetched from existing WFS. Then the Geographic Markup Language (GML) format output of the WFS is transformed on-the-fly to the RDF format.  ...  &lt;br&gt;&lt;br&gt; A solution for linking data objects to the dataset URI is also introduced by using the Vocabulary of Interlinked Datasets (VoID).  ...  The idea of the adapter is that WFS requests are translated to SPARQL queries and the query results are then transformed to WFS XML documents, which are returned to the client.  ... 
doi:10.5194/isprsarchives-xli-b2-583-2016 fatcat:7qmo2xvs7jfcrjxji4whuadbgy
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