www.lod2.eu
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Copyright 2012 STI INNSBRUCK www.sti-innsbruck.at
LOD2 in a Nutshell
Goal: Making Linked Data the model of choice for nextgeneration IT systems and applications.
Research focus:
 Very large RDF data management
 Enrichment & Interlinking
 Fusion & Information Quality
 Adaptive UI interfaces
September 2010 – October 2014: 10.2 M€
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LOD2 Consortium
Universität Leipzig (Germany)
Centrum Wiskunde & Informatica (Netherlands)
National University of Ireland in Galway (Ireland)
Freie Universität Berlin (Germany)
OpenLink Software (United Kingdom)
Semantic Web Company (Austria)
TenForce (Belgium)
Exalead (France)
Wolters Kluwer Deutschland (Germany)
Open Knowledge Foundation (United Kingdom)
Institute Mihajlo Pupin (Serbia)
KAIST (Korea)
Zemanta d.o.o. (Canada)
Instytut Informatyki Gospodarczej (Poland)
University of Economics (Czech Republic)
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LOD2 – Use Cases
Media
& Publishing
Enterprise
Data Web
The media use case
aims to improve
access to high-quality,
machine-readable
data sets generated
by publishing houses
for their customers.
• Procedures for data
input that integrate
semantic features and
annotations early in
the ingestion process
of data.
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• Impact of the LOD2
platform in the
activity of the
corporation.
Citizen –
publicdata.eu
Increase public access
to high-value,
machine-readable
data sets generated
by the European,
national as well as
regional governments
and public
administrations.
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LOD2 Technology stack
 Integrated distribution of aligned tools which support the
life-cycle of Linked (Open) Data
 Extraction, authoring/creation over enrichment, interlinking,
fusing, visualization and maintenance
 The stack comprises tools from the LOD2 partners and
third parties
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LOD2 Lifecycle
DL-Learner
OntoWiki
WIQA
Silk
LIMES
Virtuoso
MonetDB
Sig.ma
Triplify
D2R
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LOD2 Technology stack
•
D2R Server: publishing the content of relational databases on the
Semantic Web
•
MonetDB: high-performance database system that allows to store
relational, XML and RDF data
•
Triplify: “semantification” of Web applications by making database
content available as RDF, JSON or Linked Data
•
OpenLink Virtuoso: Data Management & Integration (SQL, XML and
EII), Application Integration (Web Services & SOA), Process
Management & Integration (BPEL), Distributed Collaborative
Applications
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LOD2 Technology stack
•
OntoWiki: facilitates the visual presentation of a knowledge base as an
information map
•
DBpedia Extraction: extracts structured information from Wikipedia
and to make this information available on the Web
•
DL-Learner: supervised Machine Learning in OWL and Description
Logics. It can be used to learn classes in OWL ontologies from selected
objects
•
SemMF: calculating semantic similarity between objects that are
represented as arbitrary RDF graphs
•
Silk Framework: generating RDF links between data items within
different data sources
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LOD2 Technology stack
•
PoolParty: thesaurus management system, associating concepts to
unstructured data
•
Sig.ma: Web of Data browser, embeddable widget, semantic API
•
Comprehensive Knowledge Archive Network (CKAN): registry
system for datasets or other knowledge resources
•
Sindice: process, consolidate and query the Web of Data
•
Sparallax: faceted browsing interface for SPARQL endpoints, based on
Freebase Parallax
•
WIQA: quality assessment policies to filter information from the Web
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LOD2 Technology stack
Intermediate LOD2 stack release March 2012:
•
LIMES: link discovery framework for the Web of Data
•
Valliant: XML to RDF document processing tool
•
Spatial Semantic Browser : widget for geospatial RDF data
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References
LOD2 documentation: http://wiki.lod2.eu/display/LOD2DOC/Home
LOD2 stack demo: http://demo.lod2.eu/lod2demo
LIMES: http://aksw.org/Projects/LIMES?v=z1l
DL-Learner: http://dl-learner.org/Projects/DLLearner
Sindice: http://sindice.com
CKAN: http://thedatahub.org/
OntoWiki: http://ontowiki.net/Projects/OntoWiki
MonetDB: http://www.monetdb.org
OpenLink Virtuoso: http://virtuoso.openlinksw.com/
Triplify: http://triplify.org
Sparallax: http://sparallax.deri.ie/
D2RQ: http://d2rq.org/
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