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A statistical and schema independent approach to identify equivalent properties on linked data
2013
Proceedings of the 9th International Conference on Semantic Systems - I-SEMANTICS '13
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However, a key impediment to the use of LOD cloud is limited support for data integration tasks over concepts, instances, and properties. ...
Efforts to address this limitation over properties have focused on matching data-type properties across datasets; however, matching of object-type properties has not received similar attention. ...
Acknowledgements This work was supported by the National Science Foundation under award 1143717 "III: EAGER Expressive Scalable Querying over Linked Open Data". ...
doi:10.1145/2506182.2506187
dblp:conf/i-semantics/GunaratnaTJSW13
fatcat:paibu3jjlfeetaefbahp2o5iwy
LinksB2N: Automatic Data Integration for the Semantic Web
[chapter]
2009
Lecture Notes in Computer Science
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The algorithm relies on a novel approach that uses clustering techniques to analyze the distribution of unique objects that contain overlapping information in different data graphs. ...
LinksB2N identifies equivalent RDF resources from different data sets with several degrees of confidence. ...
LinksB2N uses a different approach and ranks the RDF properties based on their uniqueness performing cross comparisons not based on a user predefined settings but on a statistical approach (see Figure ...
doi:10.1007/978-3-642-05151-7_27
fatcat:jjq57wnu7jfm7j5abnzhwnpniu
A Systematic Investigation of Explicit and Implicit Schema Information on the Linked Open Data Cloud
[chapter]
2013
Lecture Notes in Computer Science
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Schema information about resources in the Linked Open Data (LOD) cloud can be provided in a twofold way: it can be explicitly defined by attaching RDF types to the resources. ...
In this paper, we present a method and metrics to analyse the information theoretic properties and the correlation between the two manifestations of schema information. ...
The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 257859, ROBUST. ...
doi:10.1007/978-3-642-38288-8_16
fatcat:aa2tqhcbergbrae3szl3xnnyee
Use Cases Related to an Ontology of the Data Documentation Initiative
2015
IASSIST Quarterly
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Use Cases Related to an Ontology of the Data Documentation Initiative ...
Bosch et al. (2011) have developed a generic multi-level approach for designing domain ontologies based on XML Schemas. ...
SDMX (Statistical Data and Metadata Exchange), a metadata standard describing aggregate data and focusing on quantitative data, is increasingly adopted across the globe (Gregory 2011). ...
doi:10.29173/iq898
fatcat:yewnpvrwb5dnvjb5n55v3i3lrq
Analysis of schema structures in the Linked Open Data graph based on unique subject URIs, pay-level domains, and vocabulary usage
2014
Distributed and parallel databases
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However, Linked Data does exhibit schema information in a twofold way: by explicitly attaching RDF types to the entities and implicitly by using domain-specific properties to describe the entities. ...
We investigate different information theoretic properties of so-called Unique Subject URIs (USUs) and measure the correlation between the properties and types that can be observed for USUs on a large-scale ...
Parts of the computations and experiments were conducted on resources provided by the HPI Future SOC Lab. ...
doi:10.1007/s10619-014-7143-0
fatcat:gkjink33evbxnbnehh6klcyvji
Indexing Data on the Web: A Comparison of Schema-level Indices for Data Search – Extended Technical Report
[article]
2020
arXiv
pre-print
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One major design decision when indexing the Web of Data is to find a suitable index model, i.e., how to index and summarize data. ...
With each index model designed, implemented, and evaluated independently, it remains difficult to judge whether an approach generalizes well to another task, set of queries, or dataset. ...
Finding data sources on the Web using a schema-level index (SLI). A structural query is executed over an SLI to identify relevant data sources (1) . ...
arXiv:2006.07064v1
fatcat:l4j36274wrghvf2fyjyoktyvoy
Summarizing semantic graphs: a survey
2018
The VLDB journal
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Due to the complex structure of RDF graphs and their heterogeneity, the exploration and understanding tasks are significantly harder than in relational databases, where the schema can serve as a first ...
The explosion in the amount of the available RDF data has lead to the need to explore, query and understand such data sources. ...
Acknowledgments This research is implemented through IKY scholarships programme and cofinanced by the European Union and Greek national funds through the action entitled "Reinforcement of Postdoctoral ...
doi:10.1007/s00778-018-0528-3
fatcat:5yphgy3jajcwxbt5oxshadv4oy
Integration of public procurement data using linked data
2014
Journal of Systems Integration
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In this paper, we propose a generic workflow for data integration based on linked data and semantic web technologies. ...
Using a motivating example of an analytical query on public procurement data we demonstrate how data integration enables to reveal a likely case of clientelism between a contracting authority and its supplier ...
A fundamental difference of integration based on linked data in contrast to other approaches is that it shifts the focus of integration from the application level to the level of data. ...
doi:10.20470/jsi.v5i4.213
fatcat:p55dvsy3fja7rabmooenxu7y5y
Chapter 5 Federated Query Processing
[chapter]
2020
Lecture Notes in Computer Science
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Federated query processing techniques resort to source descriptions to identify relevant data sources for a query, as well as to find efficient execution plans that minimize the total execution time of ...
Federated query processing techniques provide a solution to scale up to large volumes of data distributed across multiple data sources. ...
Schema mappings also represent privacy and access control restrictions as well as statistics on the available data in each data source. ...
doi:10.1007/978-3-030-53199-7_5
fatcat:o5wzimjwbzantbnbmvmjujoine
RDF Graph Summarization Based on Approximate Patterns
[chapter]
2016
Communications in Computer and Information Science
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The Linked Open Data (LOD) cloud brings together information described in RDF and stored on the web in (possibly distributed) RDF Knowledge Bases (KBs). ...
The data in these KBs are not necessarily described by a known schema and many times it is extremely time consuming to query all the interlinked KBs in order to acquire the necessary information. ...
structural extraction approaches [4, 6] which are based on extracting some kind of schema where the summary graph is obtained based on an equivalence relation on the RDF data graph G, where a node represents ...
doi:10.1007/978-3-319-43862-7_4
fatcat:63qcxb4stndr3kb2wu4xg3f45a
Linked data schemata: Fixing unsound foundations
2017
Semantic Web Journal
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In addition to identifying problems, this paper suggests a set of recommendations for linked data ontology design best practice. ...
These vocabularies need to be unified to form a combined model because they reference or reuse terms from other linked data vocabularies and thus the definitions of those terms must be imported. ...
Acknowledgement The authors would like to thank Odhran Gavin at TCD for his assistance with manuscript preparation and editing. ...
doi:10.3233/sw-170271
fatcat:fgpetjjp55brfh52ejycp7vjca
An empirical meta-analysis of the life sciences linked open data on the web
2021
Scientific Data
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We envision that the LSLOD schema graph and the findings from this research will aid researchers who wish to query and integrate data and knowledge from multiple biomedical sources simultaneously on the ...
To tackle these challenges, the community has experimented with Semantic Web and linked data technologies to create the Life Sciences Linked Open Data (LSLOD) cloud. ...
Using an approach to automatically extract schemas and vocabularies from a set of publicly available LOD endpoints that expose biomedical data and knowledge sources on the Web, we have created an LSLOD ...
doi:10.1038/s41597-021-00797-y
pmid:33479214
fatcat:iealrgcwwbhjlicg7m43mj4mee
FLUID: A Common Model for Semantic Structural Graph Summaries Based on Equivalence Relations
[article]
2020
arXiv
pre-print
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To this end, FLUID provides features of structural summarization based on equivalence relations such as distinction of types and properties, direction of edges, bisimulation, and inference. ...
We abstract from these patterns and provide for the first time a formally defined common model FLUID (FLexible graph sUmmarIes for Data graphs) that allows to flexibly define structural graph summaries ...
As introduced above, we consider only approaches that are designed to precisely capture structural equivalences in the input graph, i. e., no statistical approaches. ...
arXiv:1908.01528v2
fatcat:i75lscq2crd4fiuyqotqciwuse
Discovering Concept Coverings in Ontologies of Linked Data Sources
[chapter]
2012
Lecture Notes in Computer Science
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Our concept alignment approach is based on analyzing the extensions of these concepts and their linked instances. ...
Despite the increase in the number of linked instances in the Linked Data Cloud in recent times, the absence of links at the concept level has resulted in heterogenous schemas, challenging the interoperability ...
The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of NSF ...
doi:10.1007/978-3-642-35176-1_27
fatcat:m2id5lnyibgnrlxma2kkro7rcq
Ontology-Alignment Techniques: Survey and Analysis
2015
International Journal of Modern Education and Computer Science
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This paper aims at counting all works of the ontology alignment field and analyzing the approaches according to different techniques (terminological, structural, extensional and semantic). ...
This can clear the way and help researchers to choose the appropriate solution to their issue. They can see the insufficiency, so that they can propose new approaches for stronger alignment. ...
For example, iMatch and CODI use the Markov networks. Others, like PARIS, propose interesting imbrications between the data links and the alignment schema. ...
doi:10.5815/ijmecs.2015.11.08
fatcat:3xpytvmlpra7rbb2bxr3zwf43i
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