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Semplore: An IR Approach to Scalable Hybrid Query of Semantic Web Data [chapter]

Lei Zhang, QiaoLing Liu, Jie Zhang, HaoFen Wang, Yue Pan, Yong Yu
2007 Lecture Notes in Computer Science  
In addition, due to the huge volume of information on the Semantic Web, the hybrid query must be processed in a very scalable way.  ...  As an extension to the current Web, Semantic Web will not only contain structured data with machine understandable semantics but also textual information.  ...  This inspires us to trade query capability for scalability and to try an IR approach of indexing, querying and searching of semantic web data.  ... 
doi:10.1007/978-3-540-76298-0_47 fatcat:gaqn4vhmcvbalohznsnioyt6sq

Querying Heterogeneous Datasets on the Linked Data Web: Challenges, Approaches, and Trends

Andre Freitas, Edward Curry, Joao Gabriel Oliveira, Sean O'Riain
2012 IEEE Internet Computing  
Consequently, the linked data Web demands approaches that can combine VSMs' usability and scalability with the expressivity required to query (semi-)structured data, bridging the semantic gap between users  ...  . 4 The system architecture's main components include query processing, ranking, an index manager, and an internal data store (YARS2), which focuses on scalability issues to enable federated queries  ... 
doi:10.1109/mic.2011.141 fatcat:kovzfmfjvfhpdeavhxcb3pueba

Querying and Searching Heterogeneous Knowledge Graphs in Real-time Linked Dataspaces [chapter]

André Freitas, Seán O'Riáin, Edward Curry
2019 Real-time Linked Dataspaces  
State-of-the-art analysis of existing approaches to searching and querying is provided in Sect. 7.4.  ...  Introduction As the volume and variety of data sources within a dataspace grow, it becomes a semantically heterogeneous and distributed environment; this presents a significant challenge to querying the  ...  The Scalable Authoritative OWL Reasoner (SAOR) provides an RDFS and a partial Web Ontology Language (OWL) reasoning engine to address scalability issues [164] .  ... 
doi:10.1007/978-3-030-29665-0_7 fatcat:7qb2boh7njgvjiknknaaig5cou

Lightweight integration of IR and DB for scalable hybrid search with integrated ranking support

Haofen Wang, Thanh Tran, Chang Liu, Linyun Fu
2011 Journal of Web Semantics  
Second, methods for hybrid query answering are needed to exploit the data from such an integrated repository.  ...  The Web contains a large amount of documents and an increasing quantity of structured data in the form of RDF triples. Many of these triples are annotations associated with documents.  ...  Wang et al., Lightweight integration of IR and DB for scalable hybrid search with integrated ranking support, Web Semantics: Sci. Serv. Agents World Wide Web (2011), doi:10.1016/j.websem.2011.08.002  ... 
doi:10.1016/j.websem.2011.08.002 fatcat:ywbrpe5yrneodcwoy6w2ikxfmi

Using BM25F for semantic search

José R. Pérez-Agüera, Javier Arroyo, Jane Greenberg, Joaquin Perez Iglesias, Victor Fresno
2010 Proceedings of the 3rd International Semantic Search Workshop on - SEMSEARCH '10  
Information Retrieval (IR) approaches for semantic web search engines have become very populars in the last years.  ...  However, one of the most important features of Semantic Web documents is the structure, since this structure allow us to represent semantic in a machine readable format.  ...  One of the main challenges for applying IR approaches to semantic search is how to represent RDF based data using an inverted index.  ... 
doi:10.1145/1863879.1863881 fatcat:jsoywuj6pfhfhbh7nj7wmvfsha

A Node Indexing Scheme for Web Entity Retrieval [chapter]

Renaud Delbru, Nickolai Toupikov, Michele Catasta, Giovanni Tummarello
2010 Lecture Notes in Computer Science  
In this paper, we present an "entity retrieval system" designed to provide entity search capabilities over datasets as large as the entire Web of Data.  ...  naming the RDF graph, generally to keep the provenance of the RDF data. 8 SPARQL: http://www.w3.org/TR/rdf-sparql-query/  ...  Semplore is an Information Retrieval engine for querying Semantic Web data which supports hybrid queries, i.e. a subset of SPARQL mixed with full text search.  ... 
doi:10.1007/978-3-642-13489-0_17 fatcat:5jrfmfpcwvdrpozm2jl6oaesky

A DISTRIBUTIONAL STRUCTURED SEMANTIC SPACE FOR QUERYING RDF GRAPH DATA

ANDRÉ FREITAS, EDWARD CURRY, JOÃO GABRIEL OLIVEIRA, SEÁN O'RIAIN
2011 International Journal of Semantic Computing (IJSC)  
The center of the approach relies on the use of a distributional semantic model to address the level of semantic interpretation demanded to build the data model independent approach.  ...  In order to query Linked Data on the Web today, end users need to be aware of which datasets potentially contain the data and also which data model describes these datasets.  ...  Semplore [14] is a search engine for Linked Data which uses a hybrid query formalism, combining keyword search with structured queries.  ... 
doi:10.1142/s1793351x1100133x fatcat:4ws744oufnf65i632tpaqoapjq

Towards efficient SPARQL query processing on RDF data

Chang Liu, Haofen Wang, Yong Yu, Linhao Xu
2010 Tsinghua Science and Technology  
Efficient support for querying large-scale resource description framework (RDF) triples plays an important role in semantic web data management.  ...  Extensive tests were conducted on both synthetic and real datasets containing up to 100 million triples to evaluate this approach with the results showing that this approach can answer most queries within  ...  However, an important problem that confronts current semantic web data management is efficient support for indexing and querying large-scale RDF data.  ... 
doi:10.1016/s1007-0214(10)70108-5 fatcat:6v6ypsvikzemtblic6rr4it6wu

Searching web data: An entity retrieval and high-performance indexing model

Renaud Delbru, Stephane Campinas, Giovanni Tummarello
2012 Journal of Web Semantics  
We introduce an indexing methodology for semi-structured data which offers a good compromise between query expressiveness, query processing and index maintenance compared to other approaches.  ...  This article examines the shift from the traditional web document model to a web data object (entity) model and studies the challenges faced in implementing a scalable and high performance system for searching  ...  Semplore is an Information Retrieval engine for querying Semantic Web data which supports hybrid queries, i.e., a subset of SPARQL mixed with full text search.  ... 
doi:10.1016/j.websem.2011.04.004 fatcat:ts4tyui34nf7ldub2l7tcavdpy

Searching Web Data: An Entity Retrieval and High-Performance Indexing Model

Renaud Delbru, Stephane Campinas, Giovanni Tummarello
2012 Social Science Research Network  
We introduce an indexing methodology for semi-structured data which offers a good compromise between query expressiveness, query processing and index maintenance compared to other approaches.  ...  This article examines the shift from the traditional web document model to a web data object (entity) model and studies the challenges faced in implementing a scalable and high performance system for searching  ...  Semplore is an Information Retrieval engine for querying Semantic Web data which supports hybrid queries, i.e., a subset of SPARQL mixed with full text search.  ... 
doi:10.2139/ssrn.3198931 fatcat:mimvtyqbkbhaniijpxrl3wqu2i

Storing and Indexing Massive RDF Datasets [chapter]

Yongming Luo, François Picalausa, George H. L. Fletcher, Jan Hidders, Stijn Vansummeren
2012 Semantic Search over the Web  
Our goal in this chapter is to give an up-to-date overview of represpentative solutions within each perspective.  ...  In the flurry of research on RDF data management in the last decade, we can identify three different perspectives on RDF: (1) a relational perspective; (2) an entity perspective; and (3) a graph-based  ...  Acknowledgements The research of FP is supported by a FNRS/FRIA scholarship. The research of SV is supported by the OSCB project funded by the Brussels Capital Region.  ... 
doi:10.1007/978-3-642-25008-8_2 fatcat:rztnvcsbwzex3feg75qkly6nlm

Effective and Efficient Entity Search in RDF Data [chapter]

Roi Blanco, Peter Mika, Sebastiano Vigna
2011 Lecture Notes in Computer Science  
At the same time, the amount of data on the Semantic Web is approaching the limits of the architectures that provide support for the full expressivity of SPARQL.  ...  These factors combined have led to an increased interest in semantic search, i.e. access to RDF data using Information Retrieval methods.  ...  The amount of data to be managed is stretching the scalability limitations of triple stores that are conventionally used to manage Semantic Web data.  ... 
doi:10.1007/978-3-642-25073-6_6 fatcat:gsyqpgnenzg2fd665sbd6ai26u

Efficient Index Maintenance for Frequently Updated Semantic Data [chapter]

Yan Liang, Haofen Wang, Qiaoling Liu, Thanh Tran, Thomas Penin, Yong Yu
Lecture Notes in Computer Science  
Some systems have adopted IR (Information Retrieval) approaches to index and search the Semantic Web data due to its capability to handle the web-scale data and efficiency on query answering.  ...  Additionally, the huge volumes of data on the Semantic Web are frequently updated. Thus, it further requires effective update mechanisms for these systems to handle the data change.  ...  However, to keep the Semantic Web data up-to-date in an IR index is a difficult task. The IR-based approaches index the Semantic Web data by reusing the existing structure of inverted index.  ... 
doi:10.1007/978-3-540-89704-0_13 fatcat:j7eeyaqfcbgktpcpwa5bkgaxpu

An efficient semantic search engine for research data in an RDF-based knowledge graph

Sarah Bensberg, Stefan Josef Decker, Matthias S. Müller, Marius Politze
2020
Semplore also uses a hybrid query option that allows structured queries and faceted searches.  ...  Semantic Web: An extension of the World Wide Web that serves to simplify data exchange and machine processing.  ...  The newest data record of resource 2: Table G . 12 shows the necessary operators of the KLM per search intention and approach, which are the basis for the calculations in Table 5 . 6 .  ... 
doi:10.18154/rwth-2020-09883 fatcat:nutghdvvpjbs5k3wgiuo2ctvoq

Efficient Optimization and Processing of Queries over Text-rich Graph-structured Data

Günter Ladwig
2013
Hybrid data can take many forms, from databases that store text documents and structured data extracted from these documents to large parts of the Web that no longer consist of textual documents only,  ...  Then, based on the introduced semantics of HGP, these HGP-interpretations of an fHGP can be processed using the proposed index scheme HybIdx.  ...  Instead of searching for documents, Semantic Web search engines and recent IR solutions focusing on structured data, support the retrieval of entities in general.  ... 
doi:10.5445/ksp/1000034423 fatcat:f6qozhf4fbdl7klqzsiawgheby
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