Why SKOS should be a focal point of your linked data strategy

Welcome to this webinar!

Agenda (including several live demos)

1. Intro: Knowledge graphs & linked data2. Various perspectives on SKOS 3. Linked data based information

architecture4. Proudly presenting … PoolParty 4.2

5. Discussion

Andreas Blumauer, MSc ITCEO of Semantic Web Company, Vienna“Product owner” of PoolParty Semantic Suite

Working in the fields of Text Mining, Semantic Web & Linked Data for over 13 years

About Semantic Web Company (SWC)

SWC was founded 2001 in Vienna, Austria

Over 20 experts in linked data

technologies

Product: PoolParty Suite (launched in

2009)

Serving customers from various

industries

EU- & US-based partner network

Our network: Customers & Partners

Customers● Credit Suisse● Daimler● Roche● Wolters Kluwer● World Bank Group● The Pokémon Company● Healthdirect Australia● Ministry of Finance (A)● Wood Mackenzie● Council of the E.U.● TC Media● American Physical

Society● Education Services

Australia● Pearson● Techtarget● Norwegian Directorate of

Immigration● REEEP● GBPN● City of Vienna● ...

Finance / Automotive / Publisher / Health Care / Public Administration / Energy / Education

Partners● Cognizant● EPAM Systems● iQuest● DTI AG● Tenforce● OpenLink Software● Ontotext● brox● bridgingIT● Wolters Kluwer● Term Management● Taxonomy Strategies● Search explained● WAND● Digirati● KMSolutions● Linked Data Factory● Taxonic● semweb

1. Intro: Knowledge graphs & linked data

Graphs everywhere...

Microsoft

Facebook

Google

Graphs are the key to ‘smart data’

It’s all about things,not strings!

Why is Google’s Knowledge Graph just about to transform ‘search’?

Facts and context information around an entity, incl. dynamic API calls

Imagine, your company had alreadyits own specific knowledge graph(s).

- complex queries (‘questions’) can be answered- integrated views on ‘things’- networked nature of entities used for research - basis for personalised services

How does it work?

http://rdf.freebase.com/m/07d5b

“Tim Berners-Lee”

rdfs:label

http://rdf.freebase.com/m/04jpl

freebase:place_of_birth

“London”rdfs:labelfreebase:tourist_attractions

http://rdf.freebase.com/m/07gyc

“London Eye”rdfs:label

Why should I use graphs instead of relational databases?

http://rdf.freebase.com/m/07d5b

“Tim Berners-Lee”

rdfs:label

http://rdf.freebase.com/m/04jpl

freebase:place_of_birth

“London”rdfs:labelfreebase:tourist_attractions

http://rdf.freebase.com/m/07gyc

“London Eye”rdfs:label

http://dbpedia.org/resource/Tim_Berners-Lee

http://www.w3.org/People/Berners-Lee/

foaf:homepage

http://dbpedia.org/resource/World_Wide_Web_Consortium

dbpedia:leaderName

http://sws.geonames.org/4943351/

dbpedia:location

“Massachusetts Institute of Technology”

http://sws.geonames.org/2643743/

wgs84_pos:latwgs84_pos:long

42.35954-71.09172

Why should I use semantic web standards based graphs?

● URIs● HTTP and● reuse of standards based

vocabularies enable● collaborative efforts to

createo linkso linkso linkso linkso linkso linkso links

● …● between entities and not

only● documents● to build the basis for

standards based Q&A machines

Pitstop: Linked Data is a data model based on graphs

● Linked Data is a graph based data model which can represent & process a wide range of information

→ Perfectly suitable for data integration & dynamic semantic publishing (DSP) in distributed environments (“semantic web”)

Linked data platforms:How many data sources are used here?

2. Various perspectives on SKOS

SKOS makes taxonomies/thesauri accessible, linkable & reusable

http://www.w3.org/2004/02/skos/

SKOS as a basis to visualize and browse semantic knowledge graphs

SKOS: You are not alone...

● Eurovoc (EU)● ESCO (EU)● Jurivoc (SUI)● ScoT (AUS)● Agrovoc (UN)● MeSH (US)● Getty Vocabularies (US)● GEMET (EEA)● GeoThesaurus (AT)● STW Economy (DE)● Polythematic SH (CZ)● Canadian Subject Headings (Can)● LCSH (US)● Worldbank Taxonomy (WBG)● Labor Law Germany Thesaurus (DE)● Reegle Thesaurus (REEEP)● Austrian Tax Law Thesaurus (AT)

● UNESCO Thesaurus (UN)● New York Times SH (US)● RAMEAU subject headings (FR)● TheSoz (DE)● The General Finnish Thesaurus (FIN)● NAL Thesaurus (US)● Social Semantic Web Thesaurus (AT)● Courts thesaurus (DE)● SITC-V4 (UN)● Google Product Taxonomy (US)● NAICS 2012 (US)● Common Procurement Vocabulary (ES)● UKAT UK Archival Thesaurus (UK)● NASA taxonomy (US)● IVOA astronomy vocabularies (UK)● IPTC News Codes (UK)● WAND taxonomies (US)

SKOS is a ‘semantic interface’ to retrieve and link distributed content

EurovocWKD German labor law thesaurus

STW Thesaurus

DBpedia

SKOS is at the intersection of three disciplines and their paradigms

SKOS

librarians & taxonomists

data engineers &artificial intelligenceschemas &

ontologies taxonomies &classification

systems

text mining &data analytics

computational linguists & information managers

Provide integrated & interlinked views on all kind of information

The SKOS/Linked Data based approach for information integration

Transforming documents into SKOS based graphs

Annotating & categorising documents

SKOS based graph of concepts

Tree of categories & terms

Standards based ontologies linked to

SKOS based concept graphs

Schemas, classes, properties,

restrictions & rules

Access SKOS via URIs and HTTP, based on standards, it’s machine-readable!

SKOS based graph of concepts

Tree of categories & terms

http://vocabulary.semantic-web.at/semweb/367

Tim Berners-Lee TimBL

skos:altLabelskos:prefLabel

(Poly-)hierarchical relations

Mappingsnon-hierarchical

relations

Let your documents become part of something bigger & make them smart!

Transforming documents into SKOS based graphs

Annotating & categorising documents

http://vocabulary.semantic-web.at/semweb/367

Tim Berners-Lee TimBL

skos:altLabelskos:prefLabel

Show me biographies of all computer scientists working for an organization located near Boston.

Make conceptual model & the semantics of your data explicitly available

Standards based ontologies linked to

SKOS based concept graphs

Schemas, classes, properties,

restrictions & rules

SKOS is not expressive enough?Apply ontologies on your SKOS thesauri!

3. Linked data based information architecture

Four-layered information architecture

enterprise knowledge model

domain specificknowledge model

annotation &categorization

legacy data& documents

Linked Enterprise Data

Relevant information to answer specific questions is all over the places.It’s often time consuming to find and link them.

1. Use taxonomies/ontologiesfor information integration

2. Use documents as they were a knowledge graph

3. Use relational databases as virtual RDF graphs

SPARQL is close to the way non-technicians use to formulate questions

SELECT DISTINCT ?personname ?picture ?countryname ?hdi ?pictureWHERE{

?person skos:prefLabel ?personname .?country skos:prefLabel ?countryname .?person a dbpedia:Person .?country a dbpedia:Country .?person skos:related ?country .?country <http://dbpedia.org/property/hdi> ?hdi .

FILTER ( ?hdi < 0.6)OPTIONAL {?person foaf:depiction ?picture .}} ORDER BY DESC(?hdi)

I want to explore medical research trends in relation to regional prosperity.

The traditional approach for data integration

Person 4711Name

Jeff BezosAffiliation

AmazonBorn in

Albuquerque

Land 4812Name

USABIP

$ 15.684 billionHDI

0.937

Solution: Application will be developed to integrate the two databases.

Show me the ‘most influential people in the world’ who were born in countries with an HDI less than 0.5?

PersonOrganization Placeaffiliated with born in

Ontology-Graph

Jeff Bezos

Amazon Albuquerque

United States

Knowledge Graph 2

GDP

$ 15.684 billion

HDI

0,937

Continents U.S.

Thesaurus/Taxonomy-Graph

America New Mexico

AlbuquerqueSouth

America

Knowledge Graph 1

Show me the ‘most influential people in the world’ who were born in countries with an HDI less than 0.5?

Solution: Taxonomies are used to link/map graphs

4. Proudly presenting … PoolParty 4.2

The Hitchhiker’s Guide to Ontology Management

The answer to taxonomy, ontology management and

everything is...

PoolParty at a glance

● user-friendly: create & maintain knowledge

graphs

● standards-based: based on W3C standards

● graph-based: natively built on graph databases

● embedded in ecosystem: use of linked (open)

data

● best-of-breed: text mining, taxonomies &

ontologies

● enterprise-ready: secure, simple to install

● integrable: connectors for SharePoint, Drupal,

Confluence, WordPress, … your own CMS?

Creation and maintenance of SKOS graphs: drag & drop, autocomplete, browser-based

Import and creation of ontologies

Apply ontologies on SKOS model: Classification of concepts

Apply ontologies on SKOS model: Relations and Attributes

Apply ontologies on SKOS model: Domain and Range Restrictions

For example: ‘Product’ and ‘Standard’ may be related by ‘uses’.PoolParty rule engine takes care of domain and range restrictions.

Make use of linked (open) data

...and ask tricky questions

Step 1: Link your thesaurus to knowledge graphs (e.g. DBpedia) / ontologies (e.g. schema.org)

Step 2: Ask tricky questions

PREFIX skos:<http://www.w3.org/2004/02/skos/core#>PREFIX foaf:<http://xmlns.com/foaf/0.1/>PREFIX dbpedia:<http://dbpedia.org/ontology/>SELECT DISTINCT ?personname ?timelinkWHERE{ ?person skos:prefLabel ?personname .?person a dbpedia:Person .?person <http://purl.org/dc/terms/subject> <http://dbpedia.org/resource/Category:Princeton_University_alumni> . OPTIONAL { ?person <http://mercury.poolparty.biz/PoolParty/schema/Time#time100page> ?timelink .} }

alumni Who of the ‘most influential people in the world’ are Princeton University alumni?

Results

Carl Cahn http://time.com/70813/

Jeff Bezoshttp://time.com/70917/

Reuse ontologies from LOD sources

Link between several thesauri/taxonomies

Make use of text corpus analysis

Use your knowledge graph for entity extraction

Step 1: Create a thesaurus Step 2: Deploy Extraction Service

Use PoolParty PowerTagging to integrate with enterprise content systems

Use PoolParty for Semantic Search

Make use of PoolParty Semantic Integrator

Start SKOS, grow big.

So Long, and Thanks for All the Links

Announcements

Webinar: Semantic SharePointWed, June 25, 2014 4:30 PM - 5:30 PM CEST

Register here.

Contact points & further information

Andreas Blumauer, MSc ITa.blumauer@semantic-web.at

http://at.linkedin.com/in/andreasblumauer/https://plus.google.com/115842492297705285184/

Semantic Web Company GmbHMariahilfer Strasse 70/8, A-1070 Vienna

+43-1-4021235http://www.semantic-web.athttp://www.poolparty-software.comhttp://slideshare.net/semwebcompanyhttp://youtube.com/semwebcompany