Results 171 to 180 of about 12,237 (214)
Database utility for cyclovoltammetry knowledge (DUCK): unified platform for electrochemical data.
Digit DiscovGaray-Ruiz D +3 more
europepmc +1 more source
Construction of Personal Health Knowledge Graphs for Clinical Data Harmonization in Breast Cancer
Liang W +15 more
europepmc +1 more source
Lecture Notes in Computer Science, 2015 The original SPARQL proposal was often criticized for its inability to navigate through the structure of RDF documents. For this reason property paths were introduced in SPARQL 1.1, but up to date there are no theoretical studies examining how their addition to the language affects main computational tasks such as query evaluation, query containment ...
Juan Reutter +2 more
exaly +4 more sources
Streaming SPARQL - Extending SPARQL to Process Data Streams [PDF]
Lecture Notes in Computer Science, 2008 A lot of work has been done in the area of data stream processing. Most of the previous approaches regard only relational or XML based streams but do not cover semantically richer RDF based stream elements. In our work, we extend SPARQL, the W3C recommendation for an RDF query language, to process RDF data streams.
Marco Grawunder
exaly +3 more sources
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Information Systems, 2022
Abstract Although the amount of RDF data has been steadily increasing over the years, the majority of information on the Web is still residing in other formats, and is often not accessible to Semantic Web services. A lot of this data is available through APIs serving JSON documents. In this work we propose a way of extending SPARQL with the option to
Matthieu Mosser +4 more
openaire +3 more sources
Abstract Although the amount of RDF data has been steadily increasing over the years, the majority of information on the Web is still residing in other formats, and is often not accessible to Semantic Web services. A lot of this data is available through APIs serving JSON documents. In this work we propose a way of extending SPARQL with the option to
Matthieu Mosser +4 more
openaire +3 more sources
Proceedings of the 30th ACM International Conference on Information & Knowledge Management, 2021
The wide adaptation of the Semantic Web and the Resource Description Framework (RDF) has made available many important datasets. The SPARQL query language facilitates the exploration of this information, which is available in a semi-structured way that does not comply with relational data models, deviating from exploration techniques that most ...
Maria Krommyda, Verena Kantere
openaire +1 more source
The wide adaptation of the Semantic Web and the Resource Description Framework (RDF) has made available many important datasets. The SPARQL query language facilitates the exploration of this information, which is available in a semi-structured way that does not comply with relational data models, deviating from exploration techniques that most ...
Maria Krommyda, Verena Kantere
openaire +1 more source
f-SPARQL: A Flexible Extension of SPARQL
2010We propose an flexible extension of SPARQL by introducing fuzzy set theory and the α-cut operation of fuzzy numbers into SPARQL. We show how to efficiently compute the top-k answers of flexible SPARQL queries with regard to membership degrees and user-defined weights.
Jingwei Cheng +2 more
openaire +1 more source
SPARQL-MM - Extending SPARQL to Media Fragments
2014Interconnecting machine readable data with multimedia assets and fragments has recently become a common practice. But specific retrieval techniques for the so called Semantic Multimedia data are still lacking. On our poster we present SPARQL-MM, a function set that extends SPARQL to Media Fragment facilities by introducing spatio-temporal filter and ...
Thomas Kurz +4 more
openaire +2 more sources