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EU-FP7 LOD2 STACK v.3 Webinar 23-10-2013. Page 1 http:// lod2.eu Creating Knowledge out of Interlinked Data

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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which contains updates to *) Virtuoso 7 [Openlink]: the original row store of the Virtuoso 6 universal server has now been replaced by a column store, increasing the performance of SPARQL queries significantly, the store is now up to three times as fast as the previous major version.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!

TRANSCRIPT

Page 1: LOD2 Webinar Series: 3rd relase of the Stack

EU-FP7 LOD2 STACK v.3 Webinar 23-10-2013. Page 1

http://lod2.eu

Creating Knowledge out of Interlinked Data

Page 2: LOD2 Webinar Series: 3rd relase of the Stack

EU-FP7 LOD2 WP6 – 12.-13.9.2013. Page 2 http://lod2.eu

Creating Knowledge out of Interlinked Data

http://lod2.eu

LOD2 is a large-scale integrating project co-funded by the European Commission within the FP7 Information and Communication Technologies Work Programme. This 4-year project comprises leading Linked Open Data technology researchers, companies, and service providers. Coming from across 12 countries the partners are coordinated by the Agile Knowledge Engineering and Semantic Web Research Group at the University of Leipzig, Germany.

LOD2 will integrate and syndicate Linked Data with existing large-scale applications. The project shows the benefits in the scenarios of Media and Publishing, Corporate Data intranets and eGovernment.

Page 3: LOD2 Webinar Series: 3rd relase of the Stack

EU-FP7 LOD2 WP6 – 12.-13.9.2013. Page 3 http://lod2.eu

Creating Knowledge out of Interlinked Data

http://lod2.eu

Once per month the LOD2 webinar series offer a free webinar about tools and services along the Linked Open Data Life Cycle.

Stay with us and learn more about acquisition, editing, composing, connected applications – and finally publishing Linked Open Data.

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EU-FP7 LOD2 WP6 – 12.-13.9.2013. Page 4 http://lod2.eu

Creating Knowledge out of Interlinked Data

http://lod2.eu

Third release of LOD2 StackPresented by Bert Van Nuffelen & Karel Kremer, TenForce

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EU-FP7 LOD2 STACK v.3 Webinar 23-10-2013. Page 5

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Creating Knowledge out of Interlinked Data

A. LOD2 Stack Release 3.0 overview

B. Connecting the dots: Workbench for Statistical Office

Presentation Overview

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Creating Knowledge out of Interlinked Data

LOD2 STACK RELEASE 3.0

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Creating Knowledge out of Interlinked Data

Release 1: 25 components/Packages

Release 2: 37 components/Packages

Release 3: 47 components in LOD2 stack release 3• 10 new components/Packages• Of which 44 are available as a Debian package• Of which 24 are available through a graphical user

interface in the demonstrator and/or the statistical workbench

LOD2 stack progress

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Creating Knowledge out of Interlinked Data

Virtuoso 6.1.x RDF Store

(conductor,sparql, isparql, ods)

Virtuososponger

lod2webapi

RDFAuthor

Limes

ORE

D2RSemantic

Spatial Browser

sparqlproxy

SigmaEE

OntoWiki

LOD-refine

Silk-latc

stanbol

valiant

Dbpedia Spotlight

SPARQLed

PoolParty

Sieve

PoolParty Extractor

Inter-linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing/

Exploration

Extraction

Storage/ Querying

Manual revision/ authoring

dl-learner

CubeViz

LOD2 demonstrator

R2R

rdf-dataset-integration

Silk

SIREn

Sparqlify

CSVImport

Dbpedia Spotlight UI

CKAN (source)

Mondeca Sparql Endpoint Status

Sindice(source)

Dbpedia (source)

LOD2 Stack 3.0

lodms

LOD2 stat. Workbench

LOD2 Authentication WebID Component

Data Cube Validation Tool

Data Cube Merging Tool

Data Cube Slicing Tool

LOD2 Provenance Component

Facete

Virtuoso 7 RDF Store(conductor,

sparql, isparql, ods)

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Creating Knowledge out of Interlinked Data

Virtuoso 7 Universal Server (1/10)Inter-

linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing

/ Explorati

on

Extraction

Storage/ Querying

Manual revision/ authorin

g• A Column store implementation

• Queries up to three times as fast as latest major version

• Many other improvements

e.g. to load times and parallellization

• Benchmarking: BSBM results:http://wifo5-03.informatik.uni-mannheim.de/bizer/berlinsparqlbenchmark/results/V7/

http://virtuoso.openlinksw.com/

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Creating Knowledge out of Interlinked Data

• Easy integration of RDF datasets as dependencies for debian packages

• Allows packages to provide example data in an easy way

Rdf dataset integration (2/10)Inter-

linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing

/ Explorati

on

Extraction

Storage/ Querying

Manual revision/ authorin

g

RDF dataset

https://github.com/AKSW/rdf-dataset-integration

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Creating Knowledge out of Interlinked Data

• Scalable SPARQL-SQL rewriter,

• Query an SQL database as if it were a RDF store.

Sparqlify (3/10)Inter-

linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing

/ Explorati

on

Extraction

Storage/ Querying

Manual revision/ authorin

g

Sparqlify Relational Database

{ SPARQL } { SQL }

http://aksw.org/Projects/Sparqlify.html

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Creating Knowledge out of Interlinked Data

SIREn (4/10)Inter-

linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing

/ Explorati

on

Extraction

Storage/ Querying

Manual revision/ authorin

g• Semantic Information Retrieval Engine

• Lucene/SOLR extension

• Transformation of RDF graphs into trees to allow very efficient querying and search

http://siren.sindice.com/

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Creating Knowledge out of Interlinked Data

R2R Framework (5/10)Inter-

linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing

/ Explorati

on

Extraction

Storage/ Querying

Manual revision/ authorin

g• RDF vocabulary mapping framework

• Defines mapping language from one vocabulary to another

• Automatic Execution of mapping rules

http://wifo5-03.informatik.uni-mannheim.de/bizer/r2r/

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Creating Knowledge out of Interlinked Data

DBpedia Spotlight UI (6/10)Inter-

linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing

/ Explorati

on

Extraction

Storage/ Querying

Manual revision/ authorin

g• Lightweight Frontend for remote DBpedia Spotlight Instance

• User interface to extract Dbpedia Entities from text

https://github.com/AKSW/dbpedia-spotlight-ui

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Creating Knowledge out of Interlinked Data

LOD Manager Suite (7/10)Inter-

linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing

/ Explorati

on

Extraction

Storage/ Querying

Manual revision/ authorin

g

• quickly set up pipelines for transforming linked data

• many extensions

• Extract RDF from other types of data.

http://www.semantic-web.at/linked-open-data-management-suite-lodms

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Creating Knowledge out of Interlinked Data

• Generic Facetted Browser for RDF data

• Supports any remote SPARQL endpoint

• Automatically visualize RDF on a map

• Permalink functionality for sharing

Facete (8/10)Inter-

linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing

/ Explorati

on

Extraction

Storage/ Querying

Manual revision/ authorin

g

http://aksw.org/Projects/Facete.html

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Creating Knowledge out of Interlinked Data

• Facetted Browser for Data Cube Vocabulary

• Many different visualizations available

• Supports more advanced features like slices

• Support for RDF export and Permalinks

CubeViz (9/10)Inter-

linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing

/ Explorati

on

Extraction

Storage/ Querying

Manual revision/ authorin

g

http://aksw.org/Projects/CubeViz.html

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Creating Knowledge out of Interlinked Data

• Transforms CSV files to RDF

• Supports transformation to Data Cubes

• Template reuse supported

CSV Import (10/10)Inter-

linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing

/ Explorati

on

Extraction

Storage/ Querying

Manual revision/ authorin

g

http://aksw.org/Projects/CSVImport.html

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Creating Knowledge out of Interlinked Data

• LOD2 demonstrator: ‘intelligent bookmark service’ for stack- http://demo.lod2.eu/lod2demo

• LOD2 statistical office workbench: deeper integration in the context of statistical data- http

://demo.lod2.eu/lod2statworkbench

Demonstrating interaction between components

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Creating Knowledge out of Interlinked Data

• WebID for user profile and security in Statistical Workbench

• Authorization control to

- (Dis)Allow access to a section (URL) in the workbench

- Provide role based views inside a section (URL) in the

workbench (for native functionality in the workbench)

• Provenance information can be collected based on profile

LOD2 Authentication – Authorization – Provenance layer

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Creating Knowledge out of Interlinked Data

More info: Stack.lod2.eu

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Creating Knowledge out of Interlinked Data

• Release 3 requires a Ubuntu 12.04LTS 64bit machine

• A simple apt-get upgrade will be enough, BUT

• New version of the stack uses the Virtuoso Open Source edition, version 7

• Conflicts with old Virtuoso Open Source 6 package

• The package manager will guide you through the transition process

• But best ensure you have a backup of the contents of the database.

• Instructions on migrating your database: http://wiki.lod2.eu/display/LOD2DOC/Upgrading+an+installation+to+the+latest+release

Updating the stack to version 3

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Creating Knowledge out of Interlinked Data

Stack.lod2.eu and Wiki.lod2.eu• How to start & How to contribute• Overview of the individual api documentations • Tutorial section• Contact point: [email protected]

Public demo• http://demo.lod2.eu/lod2demo• http://demo.lod2.eu/lod2statworkbench

LOD2 Webinars series• http://lod2.eu/BlogPost/webinar-series• View them on youtube

More information …

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Creating Knowledge out of Interlinked Data

Component improvements

regular component updates e.g. bugfixes Virtuoso 7

New components

Facete: a client side faceted browser for linked data having geospatial

coordinates.

…But we want to learn from you!

Usage experience

Challenges encountered

Mail us at:

Further improvements

[email protected]

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Creating Knowledge out of Interlinked Data

In 2014, the stack moves to a project neutral space

• http://stack.linkeddata.org/

Repository for java artifacts for linked data

• http://mvn.linkeddata.org/

A collaboration with the GeoKnow project

Ensuring the continuity: LinkedData.org

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Creating Knowledge out of Interlinked Data

LOD2 STATISTICAL OFFICE WORKBENCH

The work on the statistical Office Workbench is a the result of a cooperation between the partners IMP, ULEI and TenForce.

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Creating Knowledge out of Interlinked Data

Data, knowledge and research interest available:• Publink with DG Infso for the Digital Agenda Scoreboard (2011)• Publink with Serbian National Statistical Office (2011-2012) & use case

described in D.6.4.1.• Publicdata.eu & Deliverable D9.4.1 : assessment of government data

shows that statistical data is freely available in large quantities. (2012)• LATC project: transformation or Eurostat data into RDF (2012)• Creation of Cubeviz application (2012-2013)

But:• No tool support for creation data cubes in RDF• No tool support for managing data cubes• No tool support for merging & splitting data cubes

And selecting a domain allows to explore the integration of components better.

Motivation of the work

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Creating Knowledge out of Interlinked Data

Statistical Office Use case

1. Public sector needs an infrastructure to publish into and curate information from the LOD cloud

2. Support for consumption of this data

1

2

define standards

StatisticianCSO IT Administrator

Investment service company

Data Analyst

publish data

automatic publishing

automatic harvesting

administration

automatic publishing

advancedanalysis

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Creating Knowledge out of Interlinked Data

Statistical Office Workbench – GUI

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Creating Knowledge out of Interlinked Data

• efficient transformation / conversion of traditional data stores (e.g. CSV, XML, relational databases) into linked, machine readable formats

• building and querying  RDF Data Cube stores

• validating RDF Data Cube stores

• interlinking (e.g. code lists) and adding meaning to data

• visualization and exploration of multi-dimensional RDF data cubes

• publishing RDF Data Cube to CKAN

Functionalities

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Creating Knowledge out of Interlinked Data

DEMO STATISTICAL OFFICE WORKBENCH

Karel Kremer

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Creating Knowledge out of Interlinked Data

Demo LOD Lifecycle coverage

Inter-linking/ Fusing

Classifi-cation/

Enrichment

Quality Analysis

Evolution / Repair

Search/ Browsing/

Exploration

Extraction

Storage/ Querying

Manual revision/ authoring

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Creating Knowledge out of Interlinked Data

* Data Modified slightly to improve demo clarity

Introducing the Data

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Creating Knowledge out of Interlinked Data

• Data cube according to W3C: http://www.w3.org/TR/vocab-data-cube/

Data Cube Vocabulary

ns1:slice rdf:type qb:Slice .ns1:slice rdfs:label "only Europe region slice" .ns1:slice qb:sliceStructure local:onlyEurope .ns1:slice cube:Location cube:r1-c1 ; qb:observation cube:c1-r14 , cube:c1-r15,

cube:c1-r9 , cube:c1-r10 , cube:c1-r11 , cube:c1-r12 , cube:c1-r13 , cube:c1-r4 , cube:c1-r5 , cube:c1-r6 , cube:c1-r7 , cube:c1-r8 , cube:c1-r3 .

cube:c1-r3 rdf:typeqb:Observation ;

cube:Location cube:r1-c1 ;

cube:Disease cube:r3-c0 ;

cube:m " 7 782" ;qb:dataSet

cube:ds .

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Creating Knowledge out of Interlinked Data

Merging Data CubesD

isea

se

Region

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Creating Knowledge out of Interlinked Data

Scenario

Triple Store

CSV Import

Merge Data Cube

Link&

reconcile Visualiz

e

Statistical Office Workbench

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Creating Knowledge out of Interlinked Data

Scenario

Triple Store

CSV Import

Merge Data Cube

Link&

reconcile Visualiz

eCSV

CSV

RDF

RDF

RDF RDF

Code Lists

Publish

CKANContext

Statistical Office Workbench

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Creating Knowledge out of Interlinked Data

Scenario

Triple Store

CSV Import

Merge Data Cube

Link&

reconcile Visualiz

e

Statistical Office Workbench

CSV

CSV

RDF

RDF

RDF RDF

Code Lists

Publish

CKANContext

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Creating Knowledge out of Interlinked Data

* Data Modified slightly to improve demo clarity

Introducing the Data

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Creating Knowledge out of Interlinked Data

{ DEMO }

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Creating Knowledge out of Interlinked Data

• Get your own stack:

Install LOD2 stack from the Debian repository

Or download the pre-configured virtual machine

• Follow the tutorials here:

http://

wiki.lod2.eu/display/LOD2DOC/LOD2+Statistical+Workbench

• This and much more on: http://stack.lod2.eu

Try It Yourself!

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Creating Knowledge out of Interlinked Data

Credits

Jingle R.E.M., Martin Kaltenböck, Florian Kondert

CoordinationThomas Thurner

Martin Kaltenböck

Moderation Martin Kaltenböck

Presented byBert Van Nuffelen & Karel Kremer

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Creating Knowledge out of Interlinked Data

QUESTIONS?

Don’t forget: all info to be found at http://stack.lod2.eu !

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Creating Knowledge out of Interlinked Data

http://lod2.eu

Hope you enjoyed staying with us – if you need more detailed information, visit us at www.lod2.eu and let us know how we can improve to meet your expectations!

Don’t forget to register for our next webinar

28.11.2013 – ORE + DLearner (by ULEI) December 2013 – NIF (by ULEI)

Have a great day and don’t forget http://stack.lod2.eu

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Creating Knowledge out of Interlinked Data

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