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Flexible query processing for SPARQL

Riccardo Frosini, Andrea Calì, Alexandra Poulovassilis, Peter T. Wood, Christina Unger, Axel-Cyrille Ngonga Ngomo, Philipp Cimiano, Sören Auer, George Paliouras, Christina Unger, Axel-Cyrille Ngonga Ngomo, Philipp Cimiano (+2 others)
2017 Semantic Web Journal  
This paper presents query processing algorithms for a fragment of SPARQL 1.1 incorporating regular path queries (property path queries), extended with query approximation and relaxation operators.  ...  We also present empirical results that show promising query processing performance for the extended language.  ...  Andrea Calì acknowledges partial support by the EPSRC project "Logicbased Integration and Querying of Unindexed Data" (EP/E010865/1).  ... 
doi:10.3233/sw-150206 fatcat:ejztlklkane4dhgbtrb32k6mfm

INSTANS: High-Performance Event Processing with Standard RDF and SPARQL

Mikko Rinne, Esko Nuutila, Seppo Törmä
2012 International Semantic Web Conference  
To enable event processing with standard RDF/SPARQL we have created Instans, a high-performance Rete-based platform for continuous execution of interconnected SPARQL queries.  ...  Our goal is to show the applicability of standard RDF and SPARQL -including SPARQL 1.1 Update -for complex event processing tasks.  ...  After finding no other platform for incremental processing of multiple SPARQL 1.1 queries, we created Instans.  ... 
dblp:conf/semweb/RinneNT12 fatcat:5szpsaapuzfm3o7uiotw4kwlui

Semantic Processing of Sensor Event Stream by Using External Knowledge Bases (Short Paper)

Kia Teymourian, Adrian Paschke
2012 International Semantic Web Conference  
In this paper, we discuss the benefits of background knowledge for event processing and describe a simple classification of event query rules. 1  ...  Usage of domain background knowledge about sensor data can improve the expressiveness and flexibility of event processing in sensor network applications.  ...  The results are directly used for event processing or used in another following SPARQL query.  ... 
dblp:conf/semweb/TeymourianP12 fatcat:4s4d3vfgirhk5nigcg25lkjaby

Enabling knowledge-based complex event processing

Kia Teymourian, Adrian Paschke
2010 Proceedings of the 1st International Workshop on Data Semantics - DataSem '10  
Usage of background knowledge about events and their relations to other concepts in the application domain can improve the expressiveness and flexibility of complex event processing systems.  ...  In this dissertation, I address the challenges of adding formalized vocabularies/ontologies and declarative rules to the area of event processing for enabling more intelligent event processors which can  ...  propose Continuous SPARQL (C-SPARQL) [3] as a language for continuous query processing and Stream Reasoning.  ... 
doi:10.1145/1754239.1754281 dblp:conf/edbtw/TeymourianP10 fatcat:hhbzpi2hnje77l4x7rjf2ub3li

RAMOSE presentation at NL-RSE 2020 [article]

marilena daquino
Presentation of RAMOSE API manager over SPARQL endpoints at NL-RSE 2020  ...  processing, SPARQL query, output) One class + methods.  ...  MOTIVATION Flexible (pre/post processing) Extendible (your own heuristics) Interoperable (integrate datasets) Reusable (serve new datasets) Easy-to-use (NO SPARQL please!)  ... 
doi:10.6084/m9.figshare.14815845.v1 fatcat:wcb44ujdpzcazkkdmxybd2aqoa

Knowledge Reasoning for Intelligent Manufacturing Control System

Yu-Ju Lin, Zheng-Xian Chen, Chin-Yin Huang
2019 Procedia Manufacturing  
The ontology classifies and describes the relationships between objects of a particular domain with tree structure, whereas SPARQL plays a role of query/inference for data or metadata.  ...  The ontology classifies and describes the relationships between objects of a particular domain with tree structure, whereas SPARQL plays a role of query/inference for data or metadata.  ...  API (Implementation of ontology reasoning)  TDB (Storage Database for RDF Data) SPARQL SPARQL is an RDF query language, it is a semantic query language for databases, and it is used to retrieve the  ... 
doi:10.1016/j.promfg.2020.01.250 fatcat:gtjoa64cjzhrph4lwywp5jqapu

SPARQL extensions with preferences

Olivier Pivert, Olfa Slama, Virginie Thion
2016 Proceedings of the 31st Annual ACM Symposium on Applied Computing - SAC '16  
Even though most of the work has been devoted to relational databases, many proposals have also been made in the Semantic Web area in order to query RDF databases in a flexible way.  ...  The last decade has witnessed an increasing interest in expressing preferences inside database queries.  ...  SPARQL is the standard query language for querying RDF data.  ... 
doi:10.1145/2851613.2851690 dblp:conf/sac/PivertST16 fatcat:7mnd3cdt6bewnlycpep2lcz7nu

Efficient social network data query processing on MapReduce

Liu Liu, Jiangtao Yin, Lixin Gao
2013 Proceedings of the 5th ACM workshop on HotPlanet - HotPlanet '13  
Accordingly, SPARQL, an RDF query language, becomes popular for social network data analysis.  ...  In this paper, we propose two primitives to enable efficient translation from SPARQL queries to MapReduce jobs.  ...  Acknowledgments The authors are grateful to the anonymous reviewers for their comments and suggestions. This work is partially supported by NSF grants CCF-1018114 and CNS-1217284.  ... 
doi:10.1145/2491159.2491169 dblp:conf/sigcomm/LiuYG13 fatcat:c6vn7xqyerh25mbteomhevif7m

Processing Heterogeneous RDF Events with Standing SPARQL Update Rules [chapter]

Mikko Rinne, Haris Abdullah, Seppo Törmä, Esko Nuutila
2012 Lecture Notes in Computer Science  
When used in a system supporting incremental evaluation of multiple simultaneously active and collaborating queries SPARQL can define entire event processing networks.  ...  SPARQL Update adds support of insert and delete operations between graph stores, enabling queries to process data in steps, have persistent memory and communicate with each other.  ...  We have implemented a system for processing incrementally changing RDF data with standing SPARQL queries and Update 1 rules denoted Instans 2 [1] .  ... 
doi:10.1007/978-3-642-33615-7_24 fatcat:2y7bx2olgvhmjifdurifzzxiim

SPARQL Update for Complex Event Processing [chapter]

Mikko Rinne
2012 Lecture Notes in Computer Science  
The goal of my research is to verify the applicability of standard-compliant SPARQL for complex event processing tasks.  ...  If successful, semantic web standards RDF, SPARQL and OWL with their established base of tools have many other benefits for event processing including support for interconnecting disjoint vocabularies,  ...  Research questions are related to finding good principles and patterns for SPARQL queries used in event processing, creating a mapping to SPARQL for the main operations needed in event processing (e.g.  ... 
doi:10.1007/978-3-642-35173-0_38 fatcat:3sd47asog5ga7mgg4lakc6cvvy

R4R: Template-based REST API Framework for RDF Knowledge Graphs

Carlos Badenes-Olmedo, Paola Espinoza-Arias, Óscar Corcho
2021 International Semantic Web Conference  
To relax these constraints we propose R4R, a more flexible solution based on Web standards and REST principles that creates and publishes customizable APIs exposing Web resources from SPARQL queries organized  ...  R4R features include individual and nested resources, paginated queries, optional fields, web authentication, query parameters and sorting lists.  ...  It also maintains SPARQL compatibility by avoiding any non-SPARQL variables in queries, so that queries can be externally validated from any SPARQL endpoint.  ... 
dblp:conf/semweb/Badenes-OlmedoE21 fatcat:ymvfazbtzrel3ogplcrd2u3boq

SPARQL-Based Applications for RDF-Encoded Sensor Data

Mikko Rinne, Seppo Törmä, Esko Nuutila
2012 International Semantic Web Conference  
The Instans event processing platform, based on the Rete-algorithm, offers continuous execution of interconnected SPARQL queries and update rules.  ...  Our solution suggests that with incremental query evaluation, standard-based SPARQL and RDF can handle complex event processing tasks relevant to sensor networks, and reduce the redundant access from a  ...  Acknowledgments This work was partially supported by Tekes 22 through the funding to RYM-PRE 23 (Built Environment Process Re-Engineering) projects, and by European Commission through the SSRA (Smart Space  ... 
dblp:conf/semweb/RinneTN12 fatcat:qkr5hsoyw5gvbddsibwnajpduq

A Navigation Tool for Exploring Semantic Web Corpora

Nicolas Lasolle
2021 International Semantic Web Conference  
It relies on the use of a flexible search mechanism based on the definition and the application of sparql query transformation rules.  ...  Several technologies have been used for this corpus: the rdf model, the rdfs knowledge representation language and the sparql query language.  ...  These transformation rules are defined and applied using the sqtrl (sparql Query Transformation Rule Language) tool, which has been introduced to allow flexible querying with sparql [1] .  ... 
dblp:conf/semweb/Lasolle21 fatcat:5umit5ybwjcxdndlw5m2hrfzue

From user goals to process-based service compositions: A flexible semantic-based approach

Isabelle Mirbel
2017 2017 11th International Conference on Research Challenges in Information Science (RCIS)  
In this paper, we explore a novel approach to enable flexible and dynamic composition of heterogeneous services for end users who are usually not familiar with technical process models.  ...  The possible service compositions are expressed in BPMN in order to be then processed by a BPMN engine.  ...  Acknowledgements We thank Reda Zarhbouch for his contribution in this work, especially for producing the different templates composing the dependency and behavioral transformers.  ... 
doi:10.1109/rcis.2017.7956523 dblp:conf/rcis/Mirbel17 fatcat:5tcsv2dqobcqjgnictye7377ui

SPARQL Endpoints as Front-end for Multimedia Processing Algorithms

Ruben Verborgh, Davy Van Deursen, Jos De Roo, Erik Mannens, Rik Van de Walle
2010 International Semantic Web Conference  
This paper presents a mechanism for accessing algorithms as SPARQL endpoints, which provides a formal protocol and representation format.  ...  Multimedia processing algorithms in various domains often communicate with different proprietary protocols and representation formats, lacking a rigorous description.  ...  Acknowledgments The research activities as described in this paper were funded by Ghent University, the Interdisciplinary Institute for Broadband Technology (IBBT), the Institute for the Promotion of Innovation  ... 
dblp:conf/semweb/VerborghDRMW10 fatcat:wshj57ued5cvrbvni3t6esns4q
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