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Chapter and Conference Paper
Compact Encoding of Reified Triples Using HDTr
Contextual information about a statement is usually represented in RDF knowledge graphs via reification: creating a fresh ‘anchor’ term that represents the statement and using it in the triples that describe it. ...
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Chapter and Conference Paper
Enabling FAIR Clinical Data Standards with Linked Data
This article reports on our efforts to support FAIR Clinical Data Standards with Semantic Web technologies, including the challenge of bridging the gap for non-technical users.
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Chapter and Conference Paper
Towards Cataloguing Potential Derivations of Personal Data
The General Data Protection Regulation (GDPR) has established transparency and accountability in the context of personal data usage and collection. While its obligations clearly apply to data explicitly obtain...
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Chapter and Conference Paper
Knowledge Graph Exploration: A Usability Evaluation of Query Builders for Laypeople
SPARQL enables users to access and browse knowledge graphs in a precise way. However, using SPARQL requires knowledge that many casual users lack. To counter this, specific tools have been created that enable...
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Chapter and Conference Paper
Creating a Vocabulary for Data Privacy
Managing privacy and understanding handling of personal data has turned into a fundamental right, at least within the European Union, with the General Data Protection Regulation (GDPR) being enforced since Ma...
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Chapter and Conference Paper
A Scalable Consent, Transparency and Compliance Architecture
In this demo we present the SPECIAL consent, transparency and compliance system. The objective of the system is to afford data subjects more control over personal data processing and sharing, while at the same...
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Chapter and Conference Paper
HDTQ: Managing RDF Datasets in Compressed Space
HDT (Header-Dictionary-Triples) is a compressed representation of RDF data that supports retrieval features without prior decompression. Yet, RDF datasets often contain additional graph information, such as th...
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Chapter and Conference Paper
LOD-a-lot
LOD-a-lot democratizes access to the Linked Open Data (LOD) Cloud by serving more than 28 billion unique triples from 650 K datasets over a single self-indexed file. This corpus can be queried online with a su...
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Chapter and Conference Paper
Self-Enforcing Access Control for Encrypted RDF
The amount of raw data exchanged via web protocols is steadily increasing. Although the Linked Data infrastructure could potentially be used to selectively share RDF data with different individuals or organisa...
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Chapter and Conference Paper
Updating Wikipedia via DBpedia Map**s and SPARQL
DBpedia crystallized most of the concepts of the Semantic Web using simple map**s to convert Wikipedia articles (i.e., infoboxes and tables) to RDF data. This “semantic view” of wiki content has rapidly beco...
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Chapter and Conference Paper
HDT-MR: A Scalable Solution for RDF Compression with HDT and MapReduce
HDT a is binary RDF serialization aiming at minimizing the space overheads of traditional RDF formats, while providing retrieval features in compressed space. Several HDT-based applications, such as the recent Li...
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Chapter and Conference Paper
Efficient RDF Interchange (ERI) Format for RDF Data Streams
RDF streams are sequences of timestamped RDF statements or graphs, which can be generated by several types of data sources (sensors, social networks, etc.). They may provide data at high volumes and rates, and...
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Chapter and Conference Paper
Towards an Architecture for Managing Big Semantic Data in Real-Time
Big Data Management has become a critical task in many application systems, which usually rely on heavyweight batch processes to process large amounts of data. However, batch architectures are not an adequate ...
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Chapter and Conference Paper
Compressing Semantic Metadata for Efficient Multimedia Retrieval
The growth in multimedia production has increased the size of audiovisual repositories, and has also led to the formation of increasingly large metadata collections about these contents. Deciding how these col...
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Chapter and Conference Paper
Exchange and Consumption of Huge RDF Data
Huge RDF datasets are currently exchanged on textual RDF formats, hence consumers need to post-process them using RDF stores for local consumption, such as indexing and SPARQL query. This results in a painful ...
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Chapter and Conference Paper
Lightweighting the Web of Data through Compact RDF/HDT
The Web of Data is producing large RDF datasets from diverse fields. The increasing size of the data being published threatens to make these datasets hardly to exchange, index and consume. This scalability pro...
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Chapter and Conference Paper
Compact Representation of Large RDF Data Sets for Publishing and Exchange
Increasingly huge RDF data sets are being published on the Web. Currently, they use different syntaxes of RDF, contain high levels of redundancy and have a plain indivisible structure. All this leads to fuzzy ...
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Chapter and Conference Paper
Agile DL: Building a DELOS-Conformed Digital Library Using Agile Software Development
This paper describes a concrete partial implementation of the DELOS Reference Model to the particular field of manuscripts and incunabula, and how an agile software methodology, SCRUM, suits the evolutive nature ...