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Efficient SPARQL Autocompletion via SPARQL [article]

Hannah Bast, Johannes Kalmbach, Theresa Klumpp, Florian Kramer, Niklas Schnelle
2021 arXiv   pre-print
All suggestions are themselves obtained via SPARQL queries, which we call autocompletion queries. For existing SPARQL engines, these queries are impractically slow on large knowledge bases.  ...  We present various algorithmic and engineering improvements of an existing SPARQL engine such that these autocompletion queries are executed efficiently.  ...  RELATED WORK We first discuss related work on SPARQL autocompletion via queries in (variants of) SPARQL.  ... 
arXiv:2104.14595v1 fatcat:hd7xcowdfnco3iuejzqwbttcei

Answering End-User Questions, Queries and Searches on Wikipedia and its History

Maurizio Atzori, Shi Gao, Giuseppe M. Mazzeo, Carlo Zaniolo
2016 IEEE Data Engineering Bulletin  
Knowledge bases (KBs) encoded using RDF triples deliver many benefits to applications and programmers that access the KBs on the web via SPARQL endpoints.  ...  We first describe CANaLI, that lets people enter Natural Language (NL) questions and translates them into SPARQL queries executed on DBpedia.  ...  joins and eliminates the need for temporal coalescing. • An efficient main memory system RDF-TX for managing temporal RDF data and evaluating SPARQL T queries using a multiversion B+ tree (MVBT).  ... 
dblp:journals/debu/AtzoriGMZ16 fatcat:ckejds2eubhydoiri3xidxtfye

Live SPARQL Auto-Completion

Stéphane Campinas
2014 International Semantic Web Conference  
However, the efficient use of that knowledge is hindered by the lack of information about the data structure. This is reflected by the difficulty of writing SPARQL queries.  ...  In this work, we investigate the feasibility of providing recommendations by only querying the SPARQL endpoint directly.  ...  In this work, we aim to help users with a knowledge of SPARQL by providing an autocompletion feature. Several systems have been proposed in this direction.  ... 
dblp:conf/semweb/Campinas14 fatcat:sm7bcnje6vfjdimg6z4umeqoum

Re-using Cool URIs: Entity Reconciliation Against LOD Hubs

Fadi Maali, Richard Cyganiak, Vassilios Peristeras
2011 The Web Conference  
Reconciliation services must be effective and efficient [7] .  ...  The right part of the figure shows property autocompletion in action.  ... 
dblp:conf/www/MaaliCP11 fatcat:s7qlr245a5f6tcx6a6kptjmpsi

A Data API With Security and Graph-Level Access Control

Barry Norton, Maciej Dziardziel
2014 Extended Semantic Web Conference  
Parameterised SPARQL queries and updates are made available to form a RESTful API providing isolation from the underlying database in the style of most database-driven enterprise architectures.  ...  The Search component provides means to construct complex conjunctive queries -by building adding clauses using controlled vocabulary, via autocomplete -using abstracted properties -via dropdown, which  ...  Example SPARQL Query On behalf of any user allowed at least read-access to the image annotation component, via membership of this group, the component will execute the stored query, passing the URI of  ... 
dblp:conf/esws/NortonD14 fatcat:mm5l4hlm5jdzvcibeuhloi4xk4

SPANG: a SPARQL client supporting generation and reuse of queries for distributed RDF databases

Hirokazu Chiba, Ikuo Uchiyama
2017 BMC Bioinformatics  
Although the powerful SPARQL Protocol and RDF Query Language (SPARQL) provides a basis for exploiting RDF databases, writing SPARQL code is burdensome for users including bioinformaticians.  ...  Results: We developed SPANG, a SPARQL client that has unique features for querying RDF datasets. SPANG dynamically generates typical SPARQL queries according to specified arguments.  ...  Examples include SPARQL editors with useful functionalities such as URI autocompletion [10] , and graphical support for step-by-step construction of SPARQL queries [11, 12] .  ... 
doi:10.1186/s12859-017-1531-1 pmid:28178937 pmcid:PMC5299738 fatcat:i47c67mtdfgg7okdaf4qhyhjfe

Multilingual Natural Language Interaction with Semantic Web Knowledge Bases and Linked Open Data [chapter]

Mariana Damova, Dana Dannélls, Ramona Enache, Maria Mateva, Aarne Ranta
2014 Towards the Multilingual Semantic Web  
The latter is connected via formal rules with abstract representations derived from the syntactic trees of natural language input using the GF resource grammar library.  ...  This unique solution includes several steps of transition from natural language to SPARQL and from RDF to coherent multilingual descriptions, using the Grammatical Framework, GF.  ...  Semantic repository results Similar to any other regular SPARQL end point, SPARQL queries can be formulated and executed via a RESTFul API, 14 using the SPARQL query interface. 15 The interface is  ... 
doi:10.1007/978-3-662-43585-4_13 fatcat:shdo2klmpjaubhotjx65f5eat4

BioFed: federated query processing over life sciences linked open data

Ali Hasnain, Qaiser Mehmood, Syeda Sana e Zainab, Muhammad Saleem, Claude Warren, Durre Zehra, Stefan Decker, Dietrich Rebholz-Schuhmann
2017 Journal of Biomedical Semantics  
The cataloguing of SPARQL endpoints, including type and property indexing, leads to efficient querying of data resources over the Web of Data.  ...  It facilitates efficient query generation for data access and provides basic provenance information in combination with the retrieved data.  ...  SPARQL 1.1 query re-writting BioFed converts each SPARQL 1.0 query into corresponding SPARQL 1.1 query and executes it via the Jena API 14 .  ... 
doi:10.1186/s13326-017-0118-0 pmid:28298238 pmcid:PMC5353896 fatcat:ie4bsrw7dnh6hpxh7vy6672uha

Linked Data Templates: Ontology-driven approach to read-write Linked Data

Martynas Jusevičius
2016 Zenodo  
An ontology is an efficient way to define such structure declaratively. We use OWL to define LDT application ontologies with RDF query and state change instructions specific to that application.  ...  It mimics object-oriented multiple inheritance: a class inherits annotation properties from its superclasses via the rdfs:subClassOf relation, unless it defines one or more properties of its own which  ...  It uses metaprogramming to implement complex data management features such as application and resource creation, autocompletion, access control, provenance tracking, faceted search -all done through a  ... 
doi:10.5281/zenodo.5826249 fatcat:ghcw5fhtejbblbw7xzv7gnyoc4

ARTchives: a Linked Open Data native catalogue of art historians' archives

Marilena Daquino, Lucia Giagnolini, Francesca Tomasi
2021 Zenodo  
However, the potential of such collections is still unveiled, and performing cross-collection research is not possible via online catalogues.  ...  Whenever Wikidata terms are reused -either via autocomplete or via NER -, the system queries Wikidata SPARQL endpoint to retrieve relevant context information and store it in the ARTchives Knowledge base  ...  Data are served as JSON-LD via API, but these cannot be accessed in other syntaxes or queried via a SPARQL endpoint.  ... 
doi:10.5281/zenodo.5654633 fatcat:i5px6ujydfcylnf3qqa3y3wi4a

Linked Data Based Library Web Services For Economics

Joachim Neubert
2012 International Conference on Dublin Core and Metadata Applications  
These taxonomies in fact can be arbitrary data sources providing autocomplete data in JSON -and can be in particular SPARQL endpoints which deliver sparql+json.  ...  The Virtual International Authority File (VIAF) 8 offers OpenSearch, too, as well as the libraryspecific SRU (Search/Retrieval via URL) protocol and an autosuggest service.  ... 
dblp:conf/dc/Neubert12 fatcat:4ap35wbigvffdhub4hh4x5hrki

Publishing and interacting with linked data

Roberto García, Josep Maria Brunetti, Antonio López-Muzás, Juan Manuel Gimeno, Rosa Gil
2011 Proceedings of the International Conference on Web Intelligence, Mining and Semantics - WIMS '11  
Among these services, Rhizomer features one that provides simple edition of the data using autocomplete forms guided by the ontologies used in the dataset and the available resources.  ...  Consequently, the autocomplete feature for property values is implemented using SPARQL queries against all the resources in the repository whose label or URI contains the text typed by the user so far.  ...  The user is assisted during the editing process using an autocomplete feature.  ... 
doi:10.1145/1988688.1988710 dblp:conf/wims/GarciaBLGG11 fatcat:5josi3re3jhrbn5gxuzdj66dn4

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

Alex Stolz, Martin Hepp
2015 International Semantic Web Conference  
An autocomplete feature helps the user with term suggestions. It is based on a light-weight SPARQL query executed over the names and labels of products and product categories, respectively.  ...  A live demonstration of this use case with real product data is available via the provided online tool by selecting the SPARQL endpoint that contains the "household crawl data".  ... 
dblp:conf/semweb/StolzH15a fatcat:gzlpbnkncfg4xmzgflbxeduupa

OpenArchaeo for usable semantic interoperability

Olivier Marlet, Thomas Francart, Béatrice Markhoff, Xavier Rodier
2019 International Conference on Advanced Information Systems Engineering  
, for handling transparent interconnections with evolving distributed sources while achieving good efficiency.  ...  We present its main features: the principles behind its user friendly query interface and its SPARQL Endpoint for programs, together with its overall architecture designed to be extendable and scalable  ...  In order to populate the lists, autocomplete and date input fields in the visual query builder, the Federation layer offers specific APIs on which the graphical widgets on the frontend rely; these APIs  ... 
dblp:conf/caise/MarletFMR19 fatcat:wxxl7luy6fhqzigx2truyx6jw4

The LRA Workbench: an IDE for efficient REST API composition through linked metadata

Diego Serrano, Eleni Stroulia
2021 Journal of Big Data  
Our empirical evaluation of the $$LRA_{Wbench}$$ L R A Wbench usability demonstrates that our tool significantly improves the performance of developers formulating SPARQL queries for LRA.  ...  However, LRA's reliance on SPARQL as the user-interaction model may hinder its adoption, because it requires developers to learn the intricacies of the unconventional graph data model and its associated  ...  This methodological shift necessitates the use of SPARQL to reason about these RDF-annotated, REST-service specifications, and, in spite of the process-efficiency and system-quality improvements that it  ... 
doi:10.1186/s40537-021-00504-z fatcat:okmwyxnwdnfkzgt5mgqzyuf43i
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