This webinar in the course of the LOD2 webinar series will present use cases and live demos of D2R (Free University Berlin) and Sparqlify (University of Leipzig).
D2R Server is a tool for publishing relational databases on the Semantic Web. It enables RDF and HTML browsers to navigate the content of the database, and allows applications to query the database using the SPARQL query language.
Sparqlify is a tool enabling one to define expressive RDF views on relational databases and query them with a subset of the SPARQL query language. By featuring a novel RDF view definition syntax, it aims at simplifying the RDB-RDF mapping process.
more to be found at:
UnifiedViews is a joint project currently maintained by Semantic Web Company (SWC) and Semantica.cz (Semantica.cz). It has been mainly developed by Charles University in Prague as a student project called ODCleanStore (version 2). It is based on the experience SWC obtained with the LOD Management Suite (LODMS) used in WP7 and ODCleansStore (version 1) developed by Charles University in Prague for the WP9a use case of the LOD2 FP7 project. In the next stack release of the LOD2 stack, UnifiedViews will replace LODMS as an ETL tool in the stack and the tool has already been adopted in other projects.
In the webinar we will give a brief overview of the UnifiedViews project (Helmut Nagy). The main part will be a presentation of the tool and it's capabilities (Tomas Knap)
LOD2 plenary meeting in Paris: presentation of WP5: State of Play: Linked Data Visualization, Browsing and Authoring, by Renaud Delbru (National University of Ireland, Galway).
In this Webinar Lorenz Bühmann presents the ontology repair and enrichment tool ORE and also the DL-Learner , a machine learning tool to solve supervised learnings tasks and support knowledge engineers in constructing knowledge. Those two beneighbored tools in the LOD2 Stack are for classification and the following quality analysis of Linked Data.
http://lod2.eu/BlogPost/webinar-series
This webinar in the course of the LOD2 webinar series will present the release 3.0 of the LOD2 stack, which contains updates to
*) Virtuoso 7 [Openlink]: the original row store of the Virtuoso 6 universal server has now been replaced by a column store, increasing the performance of SPARQL queries significantly, the store is now up to three times as fast as the previous major version.
Linked Open Data Manager Suite [SWC]: the 'lodms' application allows the user to quickly set up pipelines for transforming linked data through the use of its many extensions. It also allows operations for extracting rdf from other types of data.
*) dbpedia-spotlight-ui [ULEI]: a graphical user interface component that allows the user to use a remote DBpedia spotlight instance to annotate a text with DBpedia concepts.
*) sparqlify [ULEI]: a scalable SPARQL-SQL rewriter, allowing you to query an SQL database as if it were a triple store.
*) SIREn [DERI]: a Lucene plugin that allows you to efficiently index and query RDF, as well as any textual document with an arbitrary amount of metadata fields.
*) CubeViz [ULEI]: CubeViz allows visualization of the Data Cube linked data representation of statistical data. It has support for the more advanced DataCube features, such as slices. It also allows the selection of a remote SPARQL endpoint and export of a modified cube.
*) R2R [UMA]: the R2R mapping API is now included directly into the lod2 demonstrator application, allowing users to experience the full effect of the R2R semantic mapping language through a graphical user interface.
*) ontowiki-csvimport [ULEI]: an OntoWiki extension that transforms CSV files to RDF. The extension can create Data Cubes that can be visualized by CubeViz.
If you are interested in Linked (Open) Data principles and mechanisms, LOD tools & services and concrete use cases that can be realised using LOD then join us in the free LOD2 webinar series!
This webinar in the course of the LOD2 webinar series will present use cases and live demos of D2R (Free University Berlin) and Sparqlify (University of Leipzig).
D2R Server is a tool for publishing relational databases on the Semantic Web. It enables RDF and HTML browsers to navigate the content of the database, and allows applications to query the database using the SPARQL query language.
Sparqlify is a tool enabling one to define expressive RDF views on relational databases and query them with a subset of the SPARQL query language. By featuring a novel RDF view definition syntax, it aims at simplifying the RDB-RDF mapping process.
more to be found at:
UnifiedViews is a joint project currently maintained by Semantic Web Company (SWC) and Semantica.cz (Semantica.cz). It has been mainly developed by Charles University in Prague as a student project called ODCleanStore (version 2). It is based on the experience SWC obtained with the LOD Management Suite (LODMS) used in WP7 and ODCleansStore (version 1) developed by Charles University in Prague for the WP9a use case of the LOD2 FP7 project. In the next stack release of the LOD2 stack, UnifiedViews will replace LODMS as an ETL tool in the stack and the tool has already been adopted in other projects.
In the webinar we will give a brief overview of the UnifiedViews project (Helmut Nagy). The main part will be a presentation of the tool and it's capabilities (Tomas Knap)
LOD2 plenary meeting in Paris: presentation of WP5: State of Play: Linked Data Visualization, Browsing and Authoring, by Renaud Delbru (National University of Ireland, Galway).
In this Webinar Lorenz Bühmann presents the ontology repair and enrichment tool ORE and also the DL-Learner , a machine learning tool to solve supervised learnings tasks and support knowledge engineers in constructing knowledge. Those two beneighbored tools in the LOD2 Stack are for classification and the following quality analysis of Linked Data.
http://lod2.eu/BlogPost/webinar-series
This webinar in the course of the LOD2 webinar series will present the release 3.0 of the LOD2 stack, which contains updates to
*) Virtuoso 7 [Openlink]: the original row store of the Virtuoso 6 universal server has now been replaced by a column store, increasing the performance of SPARQL queries significantly, the store is now up to three times as fast as the previous major version.
Linked Open Data Manager Suite [SWC]: the 'lodms' application allows the user to quickly set up pipelines for transforming linked data through the use of its many extensions. It also allows operations for extracting rdf from other types of data.
*) dbpedia-spotlight-ui [ULEI]: a graphical user interface component that allows the user to use a remote DBpedia spotlight instance to annotate a text with DBpedia concepts.
*) sparqlify [ULEI]: a scalable SPARQL-SQL rewriter, allowing you to query an SQL database as if it were a triple store.
*) SIREn [DERI]: a Lucene plugin that allows you to efficiently index and query RDF, as well as any textual document with an arbitrary amount of metadata fields.
*) CubeViz [ULEI]: CubeViz allows visualization of the Data Cube linked data representation of statistical data. It has support for the more advanced DataCube features, such as slices. It also allows the selection of a remote SPARQL endpoint and export of a modified cube.
*) R2R [UMA]: the R2R mapping API is now included directly into the lod2 demonstrator application, allowing users to experience the full effect of the R2R semantic mapping language through a graphical user interface.
*) ontowiki-csvimport [ULEI]: an OntoWiki extension that transforms CSV files to RDF. The extension can create Data Cubes that can be visualized by CubeViz.
If you are interested in Linked (Open) Data principles and mechanisms, LOD tools & services and concrete use cases that can be realised using LOD then join us in the free LOD2 webinar series!
(http://lod2.eu/BlogPost/webinar-series) In this Webinar Michael Martin presents CubeViz - a facetted browser for statistical data utilizing the RDF Data Cube vocabulary which is the state-of-the-art in representing statistical data in RDF. This vocabulary is compatible with SDMX and increasingly being adopted. Based on the vocabulary and the encoded Data Cube, CubeViz is generating a facetted browsing widget that can be used to filter interactively observations to be visualized in charts. Based on the selected structure, CubeViz offer beneficiary chart types and options which can be selected by users.
If you are interested in Linked (Open) Data principles and mechanisms, LOD tools & services and concrete use cases that can be realised using LOD then join us in the free LOD2 webinar series!
This presentation is about Cash and Trade Discounts. The formulas, examples, and definitions. Hope you like it. This is the thing that I used when I had my teaching demo in Bookkeeping.
I was recently asked to design and deliver a product related presentation to Canon Europe.
The presentation contains information on market trends, an overview of Megapixel technology and some of my ideas for a potential product.
Nikon VS Canon Operational Strategy. Discussing about total revenue generated per year between these two companies, 10 Operational Management Strategy (10OM) etc.
This webinar in the course of the LOD2 webinar series will present Zemanta and its LODRefine - a LOD-enabled version of OpenRefine (previously Google Refine), which is a part of the LOD2 stack. LODRefine extends cleansing and linking functionalities of OpenRefine by providing means to reconcile and augment your data with DBpedia or any other SPARQL endpoint, extract named entities using Zemanta API, export data in one of the RDF formats, and recently also to exploit available crowdsourcing services. In webinar we will demonstrate several task which demonstrate the ease of use and versatility of LODRefine.
If you are interested in Linked (Open) Data principles and mechanisms, LOD tools & services and concrete use cases that can be realised using LOD then join us in the free LOD2 webinar series: http://lod2.eu/BlogPost/webinar-series
(http://lod2.eu/BlogPost/webinar-series) In this Webinar Michael Martin presents CubeViz - a facetted browser for statistical data utilizing the RDF Data Cube vocabulary which is the state-of-the-art in representing statistical data in RDF. This vocabulary is compatible with SDMX and increasingly being adopted. Based on the vocabulary and the encoded Data Cube, CubeViz is generating a facetted browsing widget that can be used to filter interactively observations to be visualized in charts. Based on the selected structure, CubeViz offer beneficiary chart types and options which can be selected by users.
If you are interested in Linked (Open) Data principles and mechanisms, LOD tools & services and concrete use cases that can be realised using LOD then join us in the free LOD2 webinar series!
This presentation is about Cash and Trade Discounts. The formulas, examples, and definitions. Hope you like it. This is the thing that I used when I had my teaching demo in Bookkeeping.
I was recently asked to design and deliver a product related presentation to Canon Europe.
The presentation contains information on market trends, an overview of Megapixel technology and some of my ideas for a potential product.
Nikon VS Canon Operational Strategy. Discussing about total revenue generated per year between these two companies, 10 Operational Management Strategy (10OM) etc.
This webinar in the course of the LOD2 webinar series will present Zemanta and its LODRefine - a LOD-enabled version of OpenRefine (previously Google Refine), which is a part of the LOD2 stack. LODRefine extends cleansing and linking functionalities of OpenRefine by providing means to reconcile and augment your data with DBpedia or any other SPARQL endpoint, extract named entities using Zemanta API, export data in one of the RDF formats, and recently also to exploit available crowdsourcing services. In webinar we will demonstrate several task which demonstrate the ease of use and versatility of LODRefine.
If you are interested in Linked (Open) Data principles and mechanisms, LOD tools & services and concrete use cases that can be realised using LOD then join us in the free LOD2 webinar series: http://lod2.eu/BlogPost/webinar-series
This presentation gives a brief overview on achievements and challenges of the Data Web and describes different aspects of using the Semantic Data Wiki OntoWiki for Linked Data management.
Slides of the presentation by Robert Isele of Free University of Berlin, Germany in the course of the LOD2 webinar: SILK on 21.02.2012 - for more information please see: http://lod2.eu/BlogPost/webinar-series
Online Index Extraction from Linked Open Data SourcesFabio Benedetti
This presentation has been held by me at the Workshop titled Linked Data for Information Extraction 2014 (LD4IE) held at the International Semantic Web Conference 2014. The related paper is titled "Online Index Extraction from Linked Open Data Sources" and here is the link: http://ceur-ws.org/Vol-1267/LD4IE2014_Benedetti.pdf
LOD2 plenary meeting in Paris: presentation of WP6: State of Play: LOD2 Stack Architecture, by Bert Van Nuffelen, Kurt De Muelenaere, Bastiaan Deblieck - TenForce.
Similar to LOD2: State of Play WP3A - Knowledge Base Creation, Enrichment and Repair (20)
This webinar in the course of the LOD2 webinar series will present Virtuoso 7. Virtuoso Column Store, Adaptive Techniques for RDF Graph Databases. In this webinar we shall discuss the application of column store techniques to both graph (RDF) and relational data for mixed work-loads ranging from lookup to analytics.
Virtuoso is an innovative enterprise grade multi-model data server for agile enterprises & individuals. It delivers an unrivaled platform agnostic solution for data management, access, and integration. The unique hybrid server architecture of Virtuoso enables it to offer traditionally distinct server functionality within a single product
If you are interested in Linked (Open) Data principles and mechanisms, LOD tools & services and concrete use cases that can be realised using LOD then join us in the free LOD2 webinar series!
http://lod2.eu/BlogPost/webinar-series
DBpedia Spotlight is a tool employed in the Extraction stage of the LOD Lyfe Cycle, performing Entity Recognition and Linking. Although the tool currently specializes in English language, the support for other languages is currently being tested, and demos for German, Dutch and others are available or underway. The tool can be used to enable faceted browsing, semantic search, among other applications. In this webinar we will describe what is DBpedia Spotlight, how it works and how can you benefit from it in your application.
If you are interested in Linked (Open) Data principles and mechanisms, LOD tools & services and concrete use cases that can be realised using LOD then join us in the free LOD2 webinar series!
http://lod2.eu/BlogPost/webinar-series
PublicData.eu is striving to become the Pan European one-stop-shop, providing access to open, freely reusable datasets from numerous local, regional and national public bodies across Europe.
After the first release of the PublicData.eu website (Alpha release was Jan 2011 & Beta release was June 2011) and it's subsequent upgrades (a significant upgrade was efected March 2012), OKFN worked towards the deployment of various personalization features, meant to improve the user experience on Publicdata.eu and spur more interest and interaction around the official data-sets.
This webinar in the course of the LOD2 webinar series will present the implications of Linked Open Data and Semantic Web Technologies in the information and publishing industry.
The publishing industry is struggling with too much information on the one hand and too less resources to bring meaning to this information on the other hand. As an industrial use case partner in LOD2, Wolters Kluwer Deutschland GmbH investigates in detail, how LOD and Semantic Web have the potential to solve this critical issue for their business. The presentation will show what parts of the LOD2 stack are used within the use case and what challenges had to be addressed in the last two years. Interesting future areas like natural language processing will also be mentioned. The topics covered are relevant for any industry that deals with a lot of data and documents, not only publishing.
This series will provide a monthly webinar about Linked (Open) Data tools and services around the LOD2 project, the LOD2 Stack and the Linked Open Data Life Cycle, also in the form of 3rd party tools. Please find continuously updated information here: http://lod2.eu/BlogPost/webinar-series
This webinar in the course of the LOD2 webinar series will present use cases and live demos of PoolParty (by Semantic Web Company).
Knowledge organization systems like taxonomies or thesauri can benefit from linked data approaches and vice versa. In recent years SKOS became very popular in various industries due to its simplicity, SKOS turned out to be the entry point to the Semantic Web. Learn more about the possibilities to link your enterprise metadata with the web of data! Learn more about the possibilities to link your enterprise metadata with the web of data and PoolParty as means for linked data management!
If you are interested in Linked (Open) Data principles and mechanisms, LOD tools & services and concrete use cases that can be realised using LOD then join us in the LOD2 webinar series!
http://lod2.eu/BlogPost/webinar-series
Born from the wish to make linking tractable, the Link Discovery Framework for Metric Spaces (LIMES) is tailored towards the time-efficient and lossless discovery of links across knowledge bases. LIMES is an extensible declarative framework that encapsulates manifold algorithms dedicated to the processing of structured data of any sort. Built with extensibility and easy integration in mind, LIMES allows implementing applications that integrate, consume and/or generate Linked Data. Within LOD2, it will be used for discovering links between knowledge bases.
This webinar will be presented by the LOD2 Partner: University of Leipzig (ULEI), Germany.
State of Play presentation at the LOD2 Plenary Vienna 2012: WP10 - Training, Dissemination, Community Building, Fertilization by Martin Kaltenböck, Semantic Web Company (SWC)
State of Play presentation at the LOD2 Plenary Vienna 2012: WP9A - LOD for a Distributed Marketplace for Public Sector Contracts by Vojtěch Svátek (UEP)
State of Play presentation at the LOD2 Plenary Vienna 2012: WP9 publicdata.eu – Publishing Governmental Information as Linked Data by Irena Irina Bolychevsky, OKFN
State of Play presentation at the LOD2 Plenary Vienna 2012: WP8: Linked Open Data for Enterprise Data Web by Amar-Djalil MEZAOUR,Dassault Systèmes Exalead.
State of Play presentation at the LOD2 Plenary Vienna 2012: WP7 - Linked Open Data for Media and Publishing by Christian Dirschl, Wolters Kluwer Germany
State of Play presentation at the LOD2 Plenary Vienna 2012: WP5 - Linked Data Browsing, Visualization and Authoring Interfaces by Sean Policarpio of DERI / NUIG.
Slides of the presentation by Philipp Frischmuth of University of Leipzig, Germany in the course of the LOD2 webinar: OntoWiki on 24.01.2012 - for more information please see: http://lod2.eu/BlogPost/webinar-series
Slides of the presentation by Hugh Williams of OpenLink Software in the course of the LOD2 webinar: Virtuoso Universal Server on 20.12. 2011 - for more information please see: http://lod2.eu/BlogPost/webinar-series
More from LOD2 Creating Knowledge out of Interlinked Data (17)
LOD2 webinar series: Virtuoso by OpenLink Software
LOD2: State of Play WP3A - Knowledge Base Creation, Enrichment and Repair
1. Creating Knowledge out of Interlinked Data
LOD2 Paris Meeting:
WP3 Overview
Knowledge Base Creation, Enrichment and Repair
Jens Lehmann
AKSW, Universität Leipzig
LOD2 Presentation . 02.09.2010 . Page http://lod2.eu
2. Creating Knowledge out of Interlinked Data
Outline
• General WP3 Overview (Jens Lehmann)
• WP structure
• Deliverables
• Progress
• Task 3.2 Report: NLP2RDF + NIF (Sebastian Hellmann)
LOD2 Event . 06.09.2010 . 2Page 2 http://lod2.eu
3. Creating Knowledge out of Interlinked Data
WP 3 Task Overview
• Research WP, 76 PMs, InfAI (37), NUIG (10), FUB (17),
OpenLink (5), Exalead (7)
• 3.1: Provenance-Aware Extraction of Linked Data from Existing
Structured Formats
• 3.2: Provenance-Aware Extraction of Linked Data from
Unstructured and Semi-Structured Sources
• 3.3: Knowledge Base Schema Enrichment
• 3.4: Knowledge Base Repair
• 3.5: Web Linkage Validator
LOD2 Event . 06.09.2010 . 3Page 3 http://lod2.eu
4. Creating Knowledge out of Interlinked Data
WP 3 Goals
• General Goal: creation, improvement, repair of knowledge bases
• Focus: very large knowledge bases, diverse knowledge,
web/linked data
• Refine existing (Virtuoso Sponger, RDF Views, Triplify, D2R)
triplification approaches
• Improve schema of knowledge based on data
• Fix problems in knowledge bases e.g. inconsistencies
• Techniques: Semi-automatic machine learning, ontology
debugging, NLP, shallow parsing etc.
LOD2 Event . 06.09.2010 . 4Page 4 http://lod2.eu
5. Creating Knowledge out of Interlinked Data
WP 3 Task 3.1
• Provenance-Aware Extraction of Linked Data from Existing
Structured Formats (spreadsheets, relational databases, CMS,
logs, XML documents)
• Partners: FUB, InfAI, OpenLink, Exalead
• Provide: process description + tools
• Standardisation of RDB2RDF mapping
• Draws on existing tools/frameworks:
• D2R (FUB)
• Triplify (InfAI)
• Virtuoso Sponger (OpenLink)
• Deliverables: State-of-the Art Report (M6), D2R release (M20),
Triplify release (M20)
LOD2 Event . 06.09.2010 . 5Page 5 http://lod2.eu
6. Creating Knowledge out of Interlinked Data
WP 3 Task 3.1 - Progress
• D2R Server MetaData Extension (allows adding licencing and
provenance output to D2R server)
• Deliverable 3.1.1 completed: state of the art report about
knowledge extraction from structured sources
• 200+ tools collected at http://data.lod2.eu/2011/tools/
• http://en.wikipedia.org/wiki/Knowledge_extraction created
• Addition of RDF2Triggers to RDF Views in Virtuoso: enables
materialisation and synchronisation of RDF views as physical
triples
• Virtuoso sponger cartridges extended
LOD2 Event . 06.09.2010 . 6Page 6 http://lod2.eu
7. Creating Knowledge out of Interlinked Data
WP 3 Task 3.2
• Provenance-Aware Extraction of Linked Data from Unstructured
and Semi-Structured Sources (HTML, PDF+ Office documents with
metadata)
• Partners: FUB, InfAI, OpenLink, Exalead
• NLP techniques / text understanding (combine approaches, not
invent them)
• Draws on existing tools:
• NLP2RDF (InfAI)
• Stanford Parser, ASV toolkit, Zemanta, Ontos API (all external)
• DBpedia (FUB, InfAI, OpenLink)
• Deliverables: NLP2RDF release (M8), DBpedia Live (M8), DBpedia
Framework Extension (M20)
LOD2 Event . 06.09.2010 . 7Page 7 http://lod2.eu
8. Creating Knowledge out of Interlinked Data
WP 3 Task 3.2 - Progress
• NLP2RDF + NIF: presented by Sebastian
• DBpedia Live:
• New server acquired
• Running at http://live.dbpedia.org/sparql/ (beta version)
• DBpedia I18N committee founded and multi-language support
extended
• DBpedia Spotlight released (http://dbpedia.org/spotlight): tool for
annotating mentions of DBpedia resources in text
LOD2 Event . 06.09.2010 . 8Page 8 http://lod2.eu
9. Creating Knowledge out of Interlinked Data
WP 3 Task 3.3
• Knowledge Base Schema Enrichment
• Partners: InfAI
• Suggests OWL Schema Axioms to Knowlege Base Maintainers
(Definitions, Super Classes, Disjointness)
• Tightly coupled to Task 3.4
• Adapts existing approaches to work with very large Linked Data
knowledge bases
• Uses DL-Learner (InfAI) and external ontology learning approaches
• Deliverables: Enrichment Method Report (M12), User Interface
(M24), Evaluation (M36)
LOD2 Event . 06.09.2010 . 9Page 9 http://lod2.eu
10. Creating Knowledge out of Interlinked Data
WP 3 Task 3.4
• Knowledge Base Repair
• Partners: InfAI, NUIG
• Fix inconsistent knowledge bases, unsatisfiable classes, (some)
modelling errors, (some) reasoning performance problems
• Draws on a lot of existing work in ontology debugging and
extends it to knowledge bases in the LOD cloud
• Related to quality measures in WP4
• Result: ORE tool (together with Task 3.3)
• Deliverables: Report on Modelling Errors/Problems (M6), 1st ORE
Release (M28), 2nd ORE Release (M40)
LOD2 Event . 06.09.2010 . 10
Page 10 http://lod2.eu
11. Creating Knowledge out of Interlinked Data
WP 3 Task 3.4 - Progress
• Google Code project for ORE (Ontology Repair and Enrichment)
tool started: http://code.google.com/p/ore/
• Domain http://ore-tool.net/ with basic instructions
• ORE 0.2 released (desktop version – web version in development
at http://web.ore-tool.net)
• ORE paper accepted at ISWC
• Deliverable 3.4.1 completed (state of the art report on
detectable errors in knowledge bases)
• Preliminary work on algorithms for supporting debugging
SPARQL endpoints and Linked Data
LOD2 Event . 06.09.2010 . 11
Page 11 http://lod2.eu
12. Creating Knowledge out of Interlinked Data
WP 3 Task 3.5
• Web Linkage Validator
• Partners: NUIG
• Tightly coupled to Task 4.2 (Unsupervised Interlinking)
• Creates linkage reports for knowledge base maintainers
• Could suggest to add further properties, more specific property
values, better specify classes/properties for knowledge base
entitites
• Deliverables: Initial Release (M18), LOD2 Stack Component
Release (M28)
LOD2 Event . 06.09.2010 . 12
Page 12 http://lod2.eu
13. Creating Knowledge out of Interlinked Data
Thanks for your attention!
LOD2 Presentation . 02.09.2010 . Page http://lod2.eu