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Linked Data @ KESW schoolKnowledge Engineering and Semantic Web (KESW),                   5 Oct 2012, St-Petersburg       ...
Agenda (morning)Time    Topic                                   Speaker10:00   Welcome, Intro and Objectives            Da...
Agenda (afternoon)Time    Topic                                     Speaker14:30   Linked Data for Enterprises            ...
Objectives• Understand the building blocks  – URI, RDF, RDFa, SPARQL …• Know how to «Publish» and  «Consume» Linked Open D...
The Vision of the new Internet   Linked Data realizes the vision of   evolving the Web into a global   data commons, allow...
5 Stars for Open Data by Tim Berners Lee           © AKSW (LOD2) – NRU HSE / W3C                                          ...
W3C ViewA new wave of transformations            Working Groups (W3C Standards)                                         (h...
Some statistic                             HTML/CSS Validation                                Markup Validation           ...
The Semantic Web is already there!~30 bio. triples                          http://bit.ly/d37p4i                   © AKSW ...
Put the «L» in front of Open Data  Publish Data!  •Organise Data!  •License Data!  •Raw Data now!                         ...
Linked Open Data Dr Sören Auer                   11
LOD for Enterprise and GovernmentLINKED ENTERPRISE DATADANIEL HLADKYHTTP://WWW.W3.ORG/2001/SW/SWEO/PUBLIC/USECASES/HTTP://...
What are Enterprise DataLegacy (ERP) System                CRM SystemE-Mail (Outlook)                      Wiki (MediaWiki...
Data managed in silos                                  Equipment                                  and assets              ...
Connect the silos                          Equipment & Assets           Enterprise-Wide Reusable                  Informat...
Data Integration by SAP                                                      SAP MDM                       MDM            ...
Next generation SAP Real-time    Data Platform and “EIM”                                  SAP             SAP             ...
Approach using LOD technology (W3C)           © AKSW (LOD2) – NRU HSE / W3C                                           Slid...
Linked Data in Enterprise Information Integration                                             Ref.: P. Frischmuth et al.  ...
LED principles (or W3C LOD Cookbook)Publishing                       Consuming LOD• Analyse Data                   • Speci...
LED Best Practice - Vocabularies• Prerequisites Linked Data Vocabs  – Terms must be referencable (e.g. via    URI)  – Refe...
Example of Ontology/Vocab Repositoryhttp://ontowiki.net/Projects/OntoWiki                                                 ...
LED Best Practice – Data Curation• The Business Need for Curation  – Complete, Accurate, Consistent, Provenance,    Timeli...
Data Curation Examples• WikiPedia (crowd-sourcing) > DBPedia• NYT Index (Started in 1913)• Print «Index» once a year  – Wh...
NYT Index (Online)                           WorkFlow at NYT (simplified)                           1. Editor writes artic...
Demo of possible data curation process                                                  RDFaCE PlugIn                     ...
A possible framework (LED)                                    CRM         Media-         E-Gov      Predictive            ...
Tool Box (excerpt)• W3C     – Guides and charters (http://www.w3.org/standards/semanticweb/data)     – Validator suite (ht...
Early adoptersLED – USE CASES                 © AKSW (LOD2) – NRU HSE / W3C                                               ...
Digital News and SemanticsEarly adopters of RDF(a), SPARQL etc  – NYTIMES, BBC, Guardien, AP etc.            © AKSW (LOD2)...
rNews (vocab/ontology)                                                    RDF triple                                      ...
References to RDF(a)                               http://www.w3.org/TR/2011/WD-rdfa-primer-                              ...
rNews Guideline                               Artikel                               http://dev.iptc.org/rNews-Sample-Story...
Demo RDFa (rNews)http://hladky.ch/digipub/fake_news_html.htmlhttp://dev.iptc.org/rNews-10-Implementation-Guide-HTML-5-Micr...
Why rNewsWith structureddataNo structureddataBy understanding the structured data on a web page, searchengines can better ...
Cash/Ringier           © AKSW (LOD2) – NRU HSE / W3C
Cash ProjectObjectives• Similarity of articles• Relevancy, Ranking• SEO optimisation• Metadata for MashUp                 ...
RIA Novosti                             3  21               410 2                    10        11 3 9           1       12...
BBC – Dynamic Semantic Publishing           © AKSW (LOD2) – NRU HSE / W3C                                           Slide 39
More from BBChttp://www.w3.org/2001/sw/sweo/public/UseCases/BBC/http://www.bbc.co.uk/blogs/bbcinternet/2012/07/olympic_dat...
RDF(a) vs Schema.org                      by Google, Yahoo, BING, Yandexhttp://schema.org/docs/schemas.html               ...
Google Knowledge Graph          © AKSW (LOD2) – NRU HSE / W3C                                          Slide 42
E-Commerce - GoodRelations                                                                  http://purl.org/goodrelations/...
Magento Extensionhttp://www.heppnetz.de/ontologies/goodrelations/v1.htmlhttp://www.magentocommerce.com/magento-connect/sem...
LINKED DATA AT CAR COMPANYBased on http://semantic-web-journal.net/content/linked-data-enterprise-information-integrationh...
LED at abc (Proof of Concept)• The situation at abc: • 3.000 heterogeneous IT systems • Different units (car, bus, truck e...
Extraction from RDBMS     “SPARQLMap – Mapping RDB 2 RDF“1.Either resulting RDF knowledge base is materialized in a triple...
Data.gov / data.gov.uk / W3C LGDLinked Government DataW3C eGovernment Interest Grouphttp://www.w3.org/egov/wiki/Main_Page ...
What is Open (Government) Data?Open Government Data is a worldwide movementto open data (& information) of the government ...
What is Important? For Whom? What is important when thinking about open data in use?•Interoperability to ensure broad & ea...
Data.gov (Open Data Sets) and MashupsCivic Commons has a great collection of good open use cases:http://civiccommons.org/ ...
Where my money goes (Greece)      http://publicspending.medialab.ntua.gr/en/#/~/totalhttp://dl.dropbox.com/u/46182458/2012...
E.g. Chicago - https://data.cityofchicago.org/               © AKSW (LOD2) – NRU HSE / W3C                                ...
5 Star Pyramid of Open Datahttp://5stardata.info/ (Dr M. Hausenblas, DERI)See also:Christopher Gutteridge has a Linked Dat...
Let’s apply our knowledgeHANDS-ON                   © AKSW (LOD2) – NRU HSE / W3C                                         ...
Example…..https://www.dropbox.com/s/uzulsw3zu9eyff2/LOD_Test.zip                      © AKSW (LOD2) – NRU HSE / W3C       ...
Wrap-Up: Benefits and LimitationsSUMMARY                   © AKSW (LOD2) – NRU HSE / W3C                                  ...
Misconceptions about Linked Open Data                        •   All of us have to use ONE schema                        •...
The Power of Linked Open Data• Enables web-scale data publishing - distributed publication with web-  based discovery mech...
The Benefits of Linked Open Data•   Less replication (offering same    datasets in different places)•   Encouragement to r...
Cost of Data Integration – 2 Approaches                                                                       Can we affor...
End of the Day (tomorrow hackathon for Open Gov Data)Q&A                   © AKSW (LOD2) – NRU HSE / W3C                  ...
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KESW2012 Linked Data for Enterprises and Governments (5 Oct 2012)

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Transcript of "KESW2012 Linked Data for Enterprises and Governments (5 Oct 2012)"

  1. 1. Linked Data @ KESW schoolKnowledge Engineering and Semantic Web (KESW), 5 Oct 2012, St-Petersburg Dr Sören Auer „Linked Open Data“ Senior scientist and head of the research group Agile Knowledge Engineering and Semantic Web at University of Leipzig Daniel Hladky, MBA „Enterprise Linked Data“ Researcher at NRU HSE “Semantic Lab”, Deputy Director W3C Russia Office Board member at Ontos, Avicomp Services, Intecor, MatchCode Software
  2. 2. Agenda (morning)Time Topic Speaker10:00 Welcome, Intro and Objectives Daniel Essentials and W3C View10:15 Evolution of LOD Sören Status Quo and Current Challenges11:30 Break12:00 LOD Lifecycle Sören13:30 Lunch-Break © AKSW (LOD2) – NRU HSE / W3C Slide 2
  3. 3. Agenda (afternoon)Time Topic Speaker14:30 Linked Data for Enterprises Daniel Use Cases15:30 Hands-On LOD “Students”16:00 Break16:30 Hands-On continuation17:30 Team presentation of hands-on Wrap-Up Daniel18:00 End © AKSW (LOD2) – NRU HSE / W3C Slide 3
  4. 4. Objectives• Understand the building blocks – URI, RDF, RDFa, SPARQL …• Know how to «Publish» and «Consume» Linked Open Data• Tools, use cases and references• Understand benefits and limitations © AKSW (LOD2) – NRU HSE / W3C Slide 4
  5. 5. The Vision of the new Internet Linked Data realizes the vision of evolving the Web into a global data commons, allowing applications to operate on top of an unbounded set of data sources, via standardised access mechanisms. I expect that Linked Data will enable a significant evolutionary step in leading the Web to its full potential.CC-BY-SA von campuspartybrasil (flickr) © AKSW (LOD2) – NRU HSE / W3C Slide 5
  6. 6. 5 Stars for Open Data by Tim Berners Lee © AKSW (LOD2) – NRU HSE / W3C Slide 6
  7. 7. W3C ViewA new wave of transformations Working Groups (W3C Standards) (http://www.w3.org/standards/semanticweb/data) Just as the Web has transformed - RDF, RDFa, SPARQL, RDB2RDF, OWL, RIF, SKOS everything……It will transformeverything again © AKSW (LOD2) – NRU HSE / W3C Slide 7
  8. 8. Some statistic HTML/CSS Validation Markup Validation © AKSW (LOD2) – NRU HSE / W3C Slide 8
  9. 9. The Semantic Web is already there!~30 bio. triples http://bit.ly/d37p4i © AKSW (LOD2) – NRU HSE / W3C Slide 9
  10. 10. Put the «L» in front of Open Data Publish Data! •Organise Data! •License Data! •Raw Data now! Use Web-Technologies •Provide an API!• The web is an Ecosystem Use Linked Data!• Networked Data creates Network Effects • Give things an URI!• Lowers Costs of Data • Use RDF for Publishing! Integration • Link your Data to other Data (as well as the data models)! • Provide a Standard-API on top © AKSW (LOD2) – NRU HSE / W3C Slide 10
  11. 11. Linked Open Data Dr Sören Auer 11
  12. 12. LOD for Enterprise and GovernmentLINKED ENTERPRISE DATADANIEL HLADKYHTTP://WWW.W3.ORG/2001/SW/SWEO/PUBLIC/USECASES/HTTP://WWW.W3.ORG/2012/LDP/WIKI/USE_CASES_AND_REQUIREMENTS © AKSW (LOD2) – NRU HSE / W3C Slide 12
  13. 13. What are Enterprise DataLegacy (ERP) System CRM SystemE-Mail (Outlook) Wiki (MediaWiki) CMS System © AKSW (LOD2) – NRU HSE / W3C 13
  14. 14. Data managed in silos Equipment and assets Own schemas – DB structures Finance Student affairs Institutions, organizations and departments create and store their own data Departments do not effectively share information; they exchange data Data inconsistencies, redundancies, and errors affect business results and increase costs © AKSW (LOD2) – NRU HSE / W3C Slide 14
  15. 15. Connect the silos Equipment & Assets Enterprise-Wide Reusable InformationFinance Student Affairs © AKSW (LOD2) – NRU HSE / W3C Slide 15
  16. 16. Data Integration by SAP SAP MDM MDM  Load master data from multiple transactional systems (SAP & non-SAP) into a single, unifiedEMPLOYEE PRODUCT SUPPLIER CUSTOMER repository  Identify and consolidate similar master data values to eliminate duplicates  Enrich master data values centrally for enterprise wide purposes (such as reporting) SAP BI (BW)  Integrate data from any SAP or non-SAP data source for analytics or business-transaction processing  Extract, transform, and load (ETL) data in batch or real time © AKSW (LOD2) – NRU HSE / W3C Slide 16
  17. 17. Next generation SAP Real-time Data Platform and “EIM” SAP SAP SAP Big Data SAP SAP Custom Business Business3rd Party Applications Analytics Mobile Apps Suite WarehouseBI Client SAP NetWeaver (On Premise / Cloud) SAP Real-time Data Platform Open Developer APIs and Protocols Common Landscape Management SAP Sybase SQLA Sybase PowerDesigner 3rd Party DB Scale-Out Common Modeling HADOOP MPP SAP Sybase ASE SAP HANA Platform SAP Sybase IQ SAP Sybase ESP SAP Sybase SAP Data SAP MDG, MDM Replication Server Services SAP Smart Data Services Platform © AKSW (LOD2) – NRU HSE / W3C Slide 17
  18. 18. Approach using LOD technology (W3C) © AKSW (LOD2) – NRU HSE / W3C Slide 18
  19. 19. Linked Data in Enterprise Information Integration Ref.: P. Frischmuth et al. © AKSW (LOD2) – NRU HSE / W3C Slide 19
  20. 20. LED principles (or W3C LOD Cookbook)Publishing Consuming LOD• Analyse Data • Specify use cases• Clean your Data • Evaluate relevant data• Model your Data (Vocab.) sources and data sets• Choose vocabularies • Check licenses• Specify license(s) • Create consumption• Convert to RDF patterns• Link Data to other Data • Manage alignment• Publish and promote • Create Mashup, GUIs, serrvices and applications on top © AKSW (LOD2) – NRU HSE / W3C Slide 20
  21. 21. LED Best Practice - Vocabularies• Prerequisites Linked Data Vocabs – Terms must be referencable (e.g. via URI) – References have to be unambiguous – Terms have to be mappable (maybe using SKOS)• Vocabularies (co-existence) – UDEF, AGROVOC, folksonomies (del.icio.us), Company Data Dictionaries – Apply SKOS (W3C standard) © AKSW (LOD2) – NRU HSE / W3C Slide 21
  22. 22. Example of Ontology/Vocab Repositoryhttp://ontowiki.net/Projects/OntoWiki http://protege.stanford.edu/ © AKSW (LOD2) – NRU HSE / W3C Slide 22
  23. 23. LED Best Practice – Data Curation• The Business Need for Curation – Complete, Accurate, Consistent, Provenance, Timeliness• Leads to a process: > Identify data you need > Who will curate it > Define curation process > Define tools, processes needed to support the curation.• How? Which Community approach: – Internal (privat data) – (External) Pre-competitive – External – Crowd-sourcing © AKSW (LOD2) – NRU HSE / W3C Slide 23
  24. 24. Data Curation Examples• WikiPedia (crowd-sourcing) > DBPedia• NYT Index (Started in 1913)• Print «Index» once a year – What about Online business? © AKSW (LOD2) – NRU HSE / W3C Slide 24
  25. 25. NYT Index (Online) WorkFlow at NYT (simplified) 1. Editor writes articles 2. Process article using autom. Tagging (rNews) with NLP 3. Publish article online 4. Data curator review tagging and correct manually © AKSW (LOD2) – NRU HSE / W3C Slide 25
  26. 26. Demo of possible data curation process RDFaCE PlugIn - Various NLP - RDFa in HTML - rNews/schema.org - RDF to EKB/IKB - Data CurationOntos Framework © AKSW (LOD2) – NRU HSE / W3C Slide 26
  27. 27. A possible framework (LED) CRM Media- E-Gov Predictive ... Int. News Eco(API) Analysis Apps Eventos – Filter, Categorize, Visualise Scalable Search in Linked Data Manag. Quality & Extraction Coherence Base Technology Knowledge Triple Store Co- Linking Unstructured User-Interface Evolution Scalability Semi- Curation Matching sructured Orchas- Data-Quality Structured tration Sources Linked Docs RDBMS Social Op.Data (Org.Data) (HTML) Networks © AKSW (LOD2) – NRU HSE / W3C Slide 27
  28. 28. Tool Box (excerpt)• W3C – Guides and charters (http://www.w3.org/standards/semanticweb/data) – Validator suite (http://www.w3.org/QA/Tools/)• LOD2 Technology Stack• Sindice Based on EU FPx Often Open Source• Silk• LIMES• NLP: OntosMiner, OpenCalais, GATE, UIMA• RDF Store: Ontos, Virtuoso, AllegroGraph, 4Store http://www.garshol.priv.no/blog/231.html © AKSW (LOD2) – NRU HSE / W3C Slide 28
  29. 29. Early adoptersLED – USE CASES © AKSW (LOD2) – NRU HSE / W3C Slide 29
  30. 30. Digital News and SemanticsEarly adopters of RDF(a), SPARQL etc – NYTIMES, BBC, Guardien, AP etc. © AKSW (LOD2) – NRU HSE / W3C 30
  31. 31. rNews (vocab/ontology) RDF triple subject – predicat - object http://dev.iptc.org/rNewsIntro by Evan Sandhaus/NYT: http://vimeo.com/22891051 © AKSW (LOD2) – NRU HSE / W3C 31
  32. 32. References to RDF(a) http://www.w3.org/TR/2011/WD-rdfa-primer- 20110419/ http://www.w3.org/TR/rdfa-lite/ http://www.w3.org/TR/rdf-primer/ http://dev.iptc.org/Introduction-To-RDFa © AKSW (LOD2) – NRU HSE / W3C Slide 32
  33. 33. rNews Guideline Artikel http://dev.iptc.org/rNews-Sample-Story Guideline: http://dev.iptc.org/rNews-10-Implementation- Guide-Introduction Using schema.org (namespace) http://dev.iptc.org/rNews-10-Implementation- Guide-HTML-5-Microdata Using IPTC (namespace) http://dev.iptc.org/Implementation-Guide-HTML- 5-Microdata-in-IPTC-namespace Example http://www.nytimes.com/2012/09/19/world/asia/n ato-curbs-joint-operations-with-afghan- troops.html?_r=3 Validation: http://www.w3.org/RDF/Validator/ http://www.google.com/webmasters/tools/richsnippets © AKSW (LOD2) – NRU HSE / W3C 33
  34. 34. Demo RDFa (rNews)http://hladky.ch/digipub/fake_news_html.htmlhttp://dev.iptc.org/rNews-10-Implementation-Guide-HTML-5-Microdata 34
  35. 35. Why rNewsWith structureddataNo structureddataBy understanding the structured data on a web page, searchengines can better present that web page to users.Source: schema.org 2011rNews markup allows you to describe the content on your site in amachine-understandable way using RDFa. © AKSW (LOD2) – NRU HSE / W3C
  36. 36. Cash/Ringier © AKSW (LOD2) – NRU HSE / W3C
  37. 37. Cash ProjectObjectives• Similarity of articles• Relevancy, Ranking• SEO optimisation• Metadata for MashUp © AKSW (LOD2) – NRU HSE / W3C 37
  38. 38. RIA Novosti 3 21 410 2 10 11 3 9 1 12 16 3 1 14 11 2 1 12 2 17 1 5 © AKSW (LOD2) – NRU HSE / W3C Slide 38
  39. 39. BBC – Dynamic Semantic Publishing © AKSW (LOD2) – NRU HSE / W3C Slide 39
  40. 40. More from BBChttp://www.w3.org/2001/sw/sweo/public/UseCases/BBC/http://www.bbc.co.uk/blogs/bbcinternet/2012/07/olympic_data_services_and_the.html © AKSW (LOD2) – NRU HSE / W3C Slide 40
  41. 41. RDF(a) vs Schema.org by Google, Yahoo, BING, Yandexhttp://schema.org/docs/schemas.html © AKSW (LOD2) – NRU HSE / W3C Slide 41
  42. 42. Google Knowledge Graph © AKSW (LOD2) – NRU HSE / W3C Slide 42
  43. 43. E-Commerce - GoodRelations http://purl.org/goodrelations/ http://www.ebusiness-unibw.org/tools/goodrelations- annotator/Introduction by Dr M. Hepp from SemTech 2010http://www.slideshare.net/mhepp/goodrelations-semtech2010-4590918 © AKSW (LOD2) – NRU HSE / W3C Slide 43
  44. 44. Magento Extensionhttp://www.heppnetz.de/ontologies/goodrelations/v1.htmlhttp://www.magentocommerce.com/magento-connect/semantium/extension/2838/semantium_msemanticbasic#overview © AKSW (LOD2) – NRU HSE / W3C Slide 44
  45. 45. LINKED DATA AT CAR COMPANYBased on http://semantic-web-journal.net/content/linked-data-enterprise-information-integrationhttp://semantic-web-journal.net/sites/default/files/swj300.pdf © AKSW (LOD2) – NRU HSE / W3C Slide 45
  46. 46. LED at abc (Proof of Concept)• The situation at abc: • 3.000 heterogeneous IT systems • Different units (car, bus, truck etc.) with very different views • No common language • Inability to identify crucial entities (parts, locations etc.) enterprise wide• There is no (can not be a) single Enterprise Information Model• A distributed, iterative, bottom-up integration approach such as Linked Data might be able to help (pay-as-you-go). Equipment & Assets Enterprise-Wide Reusable Information Finance Student Affairs © AKSW (LOD2) – NRU HSE / W3C Slide 46
  47. 47. Extraction from RDBMS “SPARQLMap – Mapping RDB 2 RDF“1.Either resulting RDF knowledge base is materialized in a triple store &2.subsequently queried using SPARQL3.or the materialization step is avoided by dynamically mapping an input SPAQRL query into a corresponding SQL query, which renders exactly the same results as the SPARQL query being executed against the materialized RDF dump © AKSW (LOD2) – NRU HSE / W3C Slide 47
  48. 48. Data.gov / data.gov.uk / W3C LGDLinked Government DataW3C eGovernment Interest Grouphttp://www.w3.org/egov/wiki/Main_Page © AKSW (LOD2) – NRU HSE / W3C Slide 48
  49. 49. What is Open (Government) Data?Open Government Data is a worldwide movementto open data (& information) of the government /public administration* - that is NOT personal(individual related) – in human- and maschinereadable open formats (non proprietary) for use & reuse!OPEN stands for lowering the barriers to ensure as broad aspossible re-use (for everybody)!There is a new paradigm in publishing Open Government Data= look, take and play!* ….. data and information produced or commissioned by government or government controlled entities © AKSW (LOD2) – NRU HSE / W3C
  50. 50. What is Important? For Whom? What is important when thinking about open data in use?•Interoperability to ensure broad & easy use & re-use•Human AND machine readable data and meta data•In open formats•For smooth and cost efficient data integration•To generate effects on several levels: local – regional – national – EU wide & worldwideFor several target groups with several interests!•Public administration (also for internal use)•Politicians & decision makers•Citizens (Citizen Analysts)•Economy & Industry (data integration, -enrichment, APPs)•(Data) Journalists, media & publishers•Academia & Science © AKSW (LOD2) – NRU HSE / W3C
  51. 51. Data.gov (Open Data Sets) and MashupsCivic Commons has a great collection of good open use cases:http://civiccommons.org/ © AKSW (LOD2) – NRU HSE / W3C Slide 51
  52. 52. Where my money goes (Greece) http://publicspending.medialab.ntua.gr/en/#/~/totalhttp://dl.dropbox.com/u/46182458/2012-06-19%20ps.gr%20BRU.pdf © AKSW (LOD2) – NRU HSE / W3C Slide 52
  53. 53. E.g. Chicago - https://data.cityofchicago.org/ © AKSW (LOD2) – NRU HSE / W3C Slide 53
  54. 54. 5 Star Pyramid of Open Datahttp://5stardata.info/ (Dr M. Hausenblas, DERI)See also:Christopher Gutteridge has a Linked Data crash course forprogrammers. http://openorg.ecs.soton.ac.uk/wiki/Linked_Data_Basics_for_Techies © AKSW (LOD2) – NRU HSE / W3C Slide 54
  55. 55. Let’s apply our knowledgeHANDS-ON © AKSW (LOD2) – NRU HSE / W3C Slide 55
  56. 56. Example…..https://www.dropbox.com/s/uzulsw3zu9eyff2/LOD_Test.zip © AKSW (LOD2) – NRU HSE / W3C Slide 56
  57. 57. Wrap-Up: Benefits and LimitationsSUMMARY © AKSW (LOD2) – NRU HSE / W3C Slide 57
  58. 58. Misconceptions about Linked Open Data • All of us have to use ONE schema • Everything needs to be switched to RDF • We all have to learn SPARQL, there are no standard (web) APIs • LOD is a pure academic approach • LOD can only be used by Semantic Web experts • We have to change our data integration & -management approaches © AKSW (LOD2) – NRU HSE / W3C Slide 58
  59. 59. The Power of Linked Open Data• Enables web-scale data publishing - distributed publication with web- based discovery mechanisms• Everything is a resource – follow your nose to discover more about properties, classes, or codes within a code list• Everything can be annotated - make comments about observations, data series, points on a map• Easy to extend - create new properties as required, no need to plan everything up-front• Easy to merge - slot together RDF graphs, no need to worry about name clashes• Easy use and re-use on top of common schemas AND schema mapping• Allows complex querying of several distributed data sources & systems © AKSW (LOD2) – NRU HSE / W3C Slide 59
  60. 60. The Benefits of Linked Open Data• Less replication (offering same datasets in different places)• Encouragement to re-use existing datasets• Clear which datasets are providing similar / same information• More innovation because datasets can be put in a new context and lead to interesting applications• Put information in context and thereby create knowledge © AKSW (LOD2) – NRU HSE / W3C Slide 60
  61. 61. Cost of Data Integration – 2 Approaches Can we afford to mash the data with ours?Source: Price Waterhouse Coopers – Technology Forecast, Spring 2009 © AKSW (LOD2) – NRU HSE / W3C Slide 61
  62. 62. End of the Day (tomorrow hackathon for Open Gov Data)Q&A © AKSW (LOD2) – NRU HSE / W3C Slide 62
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