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Introduction to the Semantic Web
From Taxonomies to Linked Open Data
Andreas Blumauer
Semantic Web Company
www.semantic-we...
Welcome!
• CEO and managing partner of
Semantic Web Company
• Master's degree in business
informatics (University of
Vienn...
What is the Semantic Web?
What is Linked Data?
Which knowledge models are used
on the Semantic Web?
Linked Data based Text...
Uniform Resource Identifiers
1. Give things / objects / resources a URI,
not only webpages!
http://www.bbc.co.uk/nature/sp...
Semantic relations (‘triples’)
Sciurus vulgaris
Red squirrel
http://www.bbc.co.uk/nature/life/Sciuridae
2. Assign names to...
Establish links across data silos
3. Reuse existing information from all over the places,
internally and externally!
Resource Description Framework (RDF)
4. Use Semantic Web Standards to describe your
resources in a machine-readable format!
Mashups: Semantic Dynamic Publishing
5. Reuse assets and save production costs while
providing highly dynamic content
Semantic ‘Search’
6. Understand the user’s query on a conceptual level!
sciurus vulgaris search
‘sciurus vulgaris’ OR ‘red...
Content recommendation
7. Provide users with recommendations from a
bird’s eye perspective!
Animals with same
• behaviour
...
So, what exactly is ‘Linked Data’?
• ‘Linked Data’ is based on the
Semantic Web standards by
the World Wide Web
Consortium...
What is the Semantic Web?
What is Linked Data?
Which knowledge models are used
on the Semantic Web?
Linked Data based Text...
Taxonomies
Bushy-tailed squirrels
Squirrels
Rodents
Mammals
is a
is a
is a
is a
http://sws.geonames.org/2641455 (Norfolk)
...
Thesaurus & light-weight ontology
foaf:logo
foaf:homepage
http://www.poolparty.biz/portfolio-item/poolparty-extractor/
Heavy-weight ontology
Querying graphs with SPARQL
SPARQL - endpoint
PREFIX p: <http://dbpedia.org/property/>
SELECT ?film ?title
WHERE {
?film p...
Some advanced features of SPARQL
 Shortest path between two nodes in a graph
 Federated queries
 Transitivities
 Can a...
What is the Semantic Web?
What is Linked Data?
Which knowledge models are used
on the Semantic Web?
Linked Data based Text...
Entity extraction based on Linked Data
http://www.bbc.co.uk/nature/
life/Red_Squirrel
Bushy-tailed squirrels
Squirrels
is ...
Demo
What is the Semantic Web?
What is Linked Data?
Which knowledge models are used
on the Semantic Web?
Linked Data based Text...
PoolParty Semantic Suite
PoolParty Semantic Search Server
PoolParty PowerTagging
Thesaurus Server & Extractor
1. Create Thesaurus
2. Get documents annotated
3. Receive RDF for further processing
PoolParty API
 All RESTful services based on standards:
Future-proof application development
 Thesaurus as a Service:
Qu...
What is the Semantic Web?
What is Linked Data?
Which knowledge models are used
on the Semantic Web?
Linked Data based Text...
Example: Country Mashups
http://reegle.info/countries
reegle API:
3 levels of services – in 5 languages
Tagging API Example
http://api.reegle.info
blog.okfn.org/2013/04/08/sustainable-energy-policy-demands-sustainable-open-dat...
Knowledge graph visualization
http://www.gbpn.org/databases-tools/glossary
News Aggregator
http://www.gbpn.org/newsroom/news-aggregator
Wolters Kluwer’s LOD strategy
http://vocabulary.wolterskluwer.de/
Increased Search experiences
http://www.wienwin.at/
Classification based on Wikipedia
Nanotechnology researchers use graphene in
nanoelectronic chip breakthrough
(Nanowerk Ne...
PoolParty Enterprise Solutions
- Automatic content classification
based on linked open data sources like DBpedia and Geona...
Contact
Andreas Blumauer
CEO, Semantic Web Company
+43 1 4021235
a.blumauer@semantic-web.at
www.semantic-web.at
www.poolpa...
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From Taxonomies to Linked Data

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Taxonomies are well known means to create knowledge models. With the rise of Linked data, more expressive ways to create knowledge graphs can be introduced on a cost-efficient basis. Thesauri or ontologies help to create applications like Dynamic Semantic Publishing (DSP) or knowledge bases in enterprises.

Published in: Technology, Education

Transcript of "From Taxonomies to Linked Data"

  1. 1. Introduction to the Semantic Web From Taxonomies to Linked Open Data Andreas Blumauer Semantic Web Company www.semantic-web.at www.poolparty.biz
  2. 2. Welcome! • CEO and managing partner of Semantic Web Company • Master's degree in business informatics (University of Vienna) • Experienced consultant in the areas of knowledge management systems, linked data, data analytics and semantic technologies • Product management of PoolParty Semantic Suite • Lecturer at several Universities of Applied Sciences and at Danube University Krems • Editor of one the first comprehensive books in the area of the semantic web for German speaking community Semantic Web Knowledge Management Text Analytics Data Analytics Recommender Systems Semantic Search Taxonomies Thesaurus Management SKOS Enterprise Data Integration Linked Data Social Tagging Business Intelligence Confluence Semantic Sharepoint
  3. 3. What is the Semantic Web? What is Linked Data? Which knowledge models are used on the Semantic Web? Linked Data based Text Mining PoolParty Semantic Suite Examples & Demos Agenda
  4. 4. Uniform Resource Identifiers 1. Give things / objects / resources a URI, not only webpages! http://www.bbc.co.uk/nature/species/Red_Squirrel
  5. 5. Semantic relations (‘triples’) Sciurus vulgaris Red squirrel http://www.bbc.co.uk/nature/life/Sciuridae 2. Assign names to the resources and link resources to others in a meaningful way! http://www.bbc.co.uk/natu re/habitats/Taiga is a lives in has label other label
  6. 6. Establish links across data silos 3. Reuse existing information from all over the places, internally and externally!
  7. 7. Resource Description Framework (RDF) 4. Use Semantic Web Standards to describe your resources in a machine-readable format!
  8. 8. Mashups: Semantic Dynamic Publishing 5. Reuse assets and save production costs while providing highly dynamic content
  9. 9. Semantic ‘Search’ 6. Understand the user’s query on a conceptual level! sciurus vulgaris search ‘sciurus vulgaris’ OR ‘red suirrel’ Show stories from the East of England dealing with mammals which also live in the Taiga go
  10. 10. Content recommendation 7. Provide users with recommendations from a bird’s eye perspective! Animals with same • behaviour • habitats • family etc. ‘Similar’ news containing • related places • related animals etc. • related videos (YouTube) • related images (Flickr)
  11. 11. So, what exactly is ‘Linked Data’? • ‘Linked Data’ is based on the Semantic Web standards by the World Wide Web Consortium (W3C) • Linked Data is a way to link & integrate data based on web technologies • Linked Data IS NOT Open Data automatically • Linked Data can be used on the web AND on the intranet • The Linked Open Data Cloud (LOD) consists of over 62 bio. Facts/triples (http://stats.lod2.eu/) • Linked Data is an emerging technology for enterprise information integration Data is no longer locked up in databases and its non-intuitive schemas. To access linked data, simply use the web as your platform. Graph-based models and SPARQL are in many cases much more powerful than the relational models and SQL.
  12. 12. What is the Semantic Web? What is Linked Data? Which knowledge models are used on the Semantic Web? Linked Data based Text Mining PoolParty Semantic Suite Examples & Demos Agenda
  13. 13. Taxonomies Bushy-tailed squirrels Squirrels Rodents Mammals is a is a is a is a http://sws.geonames.org/2641455 (Norfolk) England United Kingdom Europe Earth part of part of part of part of http://www.bbc.co.uk/natu re/life/Red_Squirrel
  14. 14. Thesaurus & light-weight ontology foaf:logo foaf:homepage http://www.poolparty.biz/portfolio-item/poolparty-extractor/
  15. 15. Heavy-weight ontology
  16. 16. Querying graphs with SPARQL SPARQL - endpoint PREFIX p: <http://dbpedia.org/property/> SELECT ?film ?title WHERE { ?film p:starring <http://dbpedia.org/resource/Melanie_Griffith> . ?film p:starring <http://dbpedia.org/resource/Bruce_Willis> . ?film <http://dbpedia.org/property/title> ?title . } http://dbpedia.org/resource/The _Bonfire_of_the_Vanities_(film)
  17. 17. Some advanced features of SPARQL  Shortest path between two nodes in a graph  Federated queries  Transitivities  Can also be used to query relational databases  See: RDB to RDF Mapping Language
  18. 18. What is the Semantic Web? What is Linked Data? Which knowledge models are used on the Semantic Web? Linked Data based Text Mining PoolParty Semantic Suite Examples & Demos Agenda
  19. 19. Entity extraction based on Linked Data http://www.bbc.co.uk/nature/ life/Red_Squirrel Bushy-tailed squirrels Squirrels is a is a http://sws.geonames.org/2641455 England United Kingdom part of part of - population: 832500 - long: 1 - lat: 52.66667
  20. 20. Demo
  21. 21. What is the Semantic Web? What is Linked Data? Which knowledge models are used on the Semantic Web? Linked Data based Text Mining PoolParty Semantic Suite Examples & Demos Agenda
  22. 22. PoolParty Semantic Suite
  23. 23. PoolParty Semantic Search Server
  24. 24. PoolParty PowerTagging
  25. 25. Thesaurus Server & Extractor 1. Create Thesaurus 2. Get documents annotated 3. Receive RDF for further processing
  26. 26. PoolParty API  All RESTful services based on standards: Future-proof application development  Thesaurus as a Service: Query thesauri & embed them into your apps  Query thesauri + annotated documents: Semantic Search  Text Mining as a Service: All documents converted in RDF based on controlled vocabularies  SPARQL-endpoints for all knowledge graphs
  27. 27. What is the Semantic Web? What is Linked Data? Which knowledge models are used on the Semantic Web? Linked Data based Text Mining PoolParty Semantic Suite Examples & Demos Agenda
  28. 28. Example: Country Mashups http://reegle.info/countries
  29. 29. reegle API: 3 levels of services – in 5 languages
  30. 30. Tagging API Example http://api.reegle.info blog.okfn.org/2013/04/08/sustainable-energy-policy-demands-sustainable-open-data/
  31. 31. Knowledge graph visualization http://www.gbpn.org/databases-tools/glossary
  32. 32. News Aggregator http://www.gbpn.org/newsroom/news-aggregator
  33. 33. Wolters Kluwer’s LOD strategy http://vocabulary.wolterskluwer.de/
  34. 34. Increased Search experiences http://www.wienwin.at/
  35. 35. Classification based on Wikipedia Nanotechnology researchers use graphene in nanoelectronic chip breakthrough (Nanowerk News) Electronic components built from single molecules using chemical synthesis could pave the way for smaller, faster and more green and sustainable electronic devices. Now for the first time, a transistor made from just one molecular monolayer has been made to work where it really counts. On a computer chip. The molecular integrated circuit was created by a group of chemists and physicists from the Department of Chemistry Nano-Science Center at the University of Copenhagen and Chinese Academy of Sciences, Beijing. Their discovery has just been published online in Advanced Materials ("Ultrathin Reduced Graphene Oxide Films as Transparent Top-Contacts for Light Switchable Solid-State Molecular Junctions"). The breakthrough was made possible through an innovative use of the two dimensional carbon material graphene. Kasper Nørgaard is an associate professor in chemistry at the University of Copenhagen. He believes that the first advantage of the newly developed graphene chip will be to ease the testing of coming molecular electronic components. But he is also confident, that it represents a first step towards proper integrated molecular circuits. Read more: http://www.nanowerk.com/news2/newsid=30975.php #ixzz2WqZ2KyHW
  36. 36. PoolParty Enterprise Solutions - Automatic content classification based on linked open data sources like DBpedia and Geonames - Targeted content distribution inside the intranet support knowledge workers; provide semantic search - Enterprise vocabulary management understand the context, enrich content with definitions etc. - Semantic knowledge bases Use PoolParty as a linked data management system and provide knowledge graphs in enterprise systems like Sharepoint Several integrations with Sharepoint, Confluence, Drupal, Oracle Text, and WordPress were implemented.
  37. 37. Contact Andreas Blumauer CEO, Semantic Web Company +43 1 4021235 a.blumauer@semantic-web.at www.semantic-web.at www.poolparty.biz Partner network:
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