Peak cloud based data - linked data
1 like560 views
A description of using linked data to create clear and unambiguous systems across the Internet or within your enterprise.
More Related Content
Similar to Peak cloud based data - linked data (20)
Recently uploaded (20)
Peak cloud based data - linked data
- 1. Dealing with the new data in the Cloud Linked Data London - New York - Dubai - Mumbai 2011
- 2. Table of Contents Definitions 3 History 5 The Modigliani Test 11 Link Data 13 Raw Data 23 Resource Description Framework 30 Linked Data Principles 42 Publishing Linked Data 57 Faceted Browsers 65 On-the-fly Mashups 67 SPARQL 73 What is a Linked Data Application 77 Characteristics of a Linked Data Application 78 Contact Us 81
- 3. Definitions RDF: The RDF data model is similar to classic conceptual modelling approaches such as Entity-Relationship or Class diagrams, as it is based upon the idea of making statements about resources (in particular Web resources) in the form of subject- predicate-object expressions. These expressions are known as triples in RDF terminology. The subject denotes the resource, and the predicate denotes traits or aspects of the resource and expresses a relationship between the subject and the object. For example, one way to represent the notion "The sky has the colour blue" in RDF is as the triple: a subject denoting "the sky", a predicate denoting "has the colour", and an object denoting "blue". RDF is an abstract model with several serialization formats (i.e., file formats), and so the particular way in which a resource or triple is encoded varies from format to format.
- 4. Definitions SPARQL: (SPARQL Protocol and RDF Query Language, pronounced "sparkle") is an RDF query language Linked Data: Linked Data describes a method of publishing structured data, so that it can be interlinked and become more useful. It builds upon standard Web technologies, such as HTTP and URIs - but rather than using them to serve web pages for human readers, it extends them to share information in a way that can be read automatically by computers. This enables data from different sources to be connected and queried.
- 5. History Linked Data Design Issues by Tim Berners-Lee July 2006 Linked Open Data Project WWW2007 First LOD Cloud May 2007 BBC publishes Linked Data 2008 NY Times announcement SemTech2009 - ISWC09 Data.gov.uk publishes Linked Data 2010
- 6. May 2007
- 7. Mar 2008
- 8. Sept 2008
- 9. Mar 2009
- 10. July 2009
- 11. The Modigliani Test Show me all the locations of all the original paintings of Modigliani Daniel Koller (@dakoller) showed that you can find this with a SPARQL query on DBpedia
- 13. So what is Linked Data?
- 14. Do you SEARCH or do you FIND?
- 15. Search for Football Players who went to the University of Texas at Austin, played for the Dallas Cowboys as Cornerback
- 17. Why cant we just FIND it
- 19. Using the Current Web =internet + links + docs is terribly inefficient
- 20. So what is the problem? We arent always interested in documents We are interested in THINGS These THINGS might be in documents We can read a HTML document rendered in a browser and find what we are searching for This is hard for computers. Its typically based on guesswork from some primitive NLP engine, or simple keyword search
- 21. What do we need to do? Make it easy for computers/software to find THINGS
- 22. How can we do that? Besides publishing documents on the web - which computers cant understand easily Lets publish something that computers can understand
- 23. RAW DATA! But dont we already publish raw data in RDBMS, XML, CSV, etc?
- 24. Yes! But its not in a consistent format, and very difficult to integrate (or link).
- 25. For example, how do I know that the Wael Elrifai in Facebook is the same as Wael Elrifai in Twitter
- 26. Dont we already have a standard way of publishing on the web?
- 27. We have a standardized way of publishing documents on the web, right? HTML
- 28. Then why cant we have a standard way of publishing data on the Web?
- 29. In fact, we do have one.
- 30. Resource Description Framework (RDF) A data model A way to model data i.e. Relational databases use relational data model RDF is a triple data model Labeled Graph Subject, Predicate, Object <Wael> <was born in> <Beirut> <Beirut> <is part of> <the Lebanon> <Wael> <likes> <the Semantic Web>
- 31. RDF can be serialized in different ways RDF/XML RDFa (RDF in HTML) N3 Turtle JSON
- 32. So does that mean that I have to publish my data in RDF now?
- 33. You dont have to but it sure would be nice.
- 34. Document on the Web
- 35. Databases back up documents THINGS have PROPERTIES: A Book as a Title, an author, Isbn Title Author PublisherID ReleasedData 978-0-596- Programming Toby Segaran 1 July 2009 15381-6 the Semantic Web PublisherID PublisherNa This is a THING: me A book title Programming the Semantic Web by Toby Segaran, 1 OReilly Media
- 36. Lets represent the data in RDF Isbn Title Author PublisherID ReleasedData 978-0- Programming Toby 1 July 2009 596- the Semantic Segaran 15381- Web 6 Programming the PublisherID PublisherName title Semantic Web 1 OReilly Media author book Toby Segaran isbn 978-0-596-15381-6 publisher Publisher OReilly name
- 37. Remember that we are on the web Everything on the web is identified by a URL
- 38. And now lets link the data to other data Programming the Semantic Web title http:///isbn Toby author Segaran 978 978-0-596-15381-6 isbn publisher http:///pu OReilly blisher1 name
- 39. And now consider the data from Revyu.com hasReview http:// http:/// /revie isbn978 w1 description reviewer Awesom e Book name http:// Wael /reviewer Elrifai
- 40. Lets start to link data http:// hasReview http:/// /revie isbn978 w1 Programming description title the Semantic hasReviewer sameAs Web Awesom http:// author Toby e Book /isbn9 Segaran 78 http:// /revie name wer isbn 978-0-596-15381-6 Wael publisher Elrifai http:/// name publisher1 OReilly
- 41. Data on the Web that is in RDF and is linked to other RDF data is LINKED DATA
- 42. Linked Data Principles 1. Use URIs as names for things 2. Use HTTP URIs so that people can look up (dereference) those names. 3. When someone looks up a URI, provide useful information. 4. Include links to other URIs so that they can discover more things.
- 43. Linked Data makes the web appear a single global database! The same can be done inside your company!
- 44. What if you wanted to know your companys EBITDA for Catalonia in 2010? You could have a EDW pre-aggregate and distribute the data, an analyst calculate it on the spot, or
- 45. Linked data in your internal semantic web could relate all transactions to a linked financial formulae! You ask the question, tell your system where to look (as part of the question, this can be prebuilt) and voil!
- 46. I can query a database with SQL. Is there a way to query Linked Data with a query language?
- 47. Yes! There is actually a standardize language for that
- 48. FIND all the reviews on the book Programming the Semantic Web by people who live in London
- 49. hasReview http:/// http:/// Programming isbn978 the Semantic review1 Web description title hasReviewer sameAs Toby Awesom http:// Segaran author e Book /isbn9 78 http:// 978-0-596-15381-6 /reviewer name isbn sameAs Wael publisher http:// Elrifai name OReilly /publishe r1 http://waelw orldwide.com livesIn http://dbpedia.org/London name Wael Elrifai
- 50. This looks cool, but lets be realistic. What is the incentive to publish Linked Data?
- 51. What was your incentive to publish an HTML (Intranet) page in 1990?
- 52. 1) Share data in documents 2) Because you neighbor was doing it
- 53. So why should we publish Linked Data in 2011?
- 54. 1) Share data as data 2) Because you neighbor is doing it
- 55. Youll be among good company
- 56. Linked Data Publishers UK Government US Government BBC Open Calais Thomson Reuters Freebase NY Times Best Buy CNET Dbpedia
- 57. How can I publish Linked Data?
- 58. Publishing Linked Data Legacy Data in Relational Databases D2R Server Virtuoso Triplify Ultrawrap CMS Drupal 7 Native RDF Stores Databases for RDF (Triple Stores) AllegroGraph, Jena, Sesame, Virtuoso Talis Platform (Linked Data in the Cloud) In HTML with RDFa
- 59. Consuming Linked Data by Humans
- 60. HTML Browsers RDF can be serialized in RDFa Have you heard of Yahoos Search Monkey Google Rich Snippets? They are consuming RDFa But WHY?
- 61. Because there is life beyond ten blue links
- 62. Google and Yahoo are starting to crawl RDFa! The Semantic Web is a reality!
- 63. The Reality Yahoo is crawling data that is in RDFa and Microformats under a specific vocabularies FOAF GoodRelations Google is crawling RDFa and Microformaats that use the Google vocabulary
- 64. Linked Data Browsers Tabulator http://www.w3.org/2005/ajar/tab OpenLink http://ode.openlinksw.com/ Zitgist Dataviewr http://dataviewer.zitgist.com/ Marbles http://www5.wiwiss.fu-berlin.de/marbles/ Explorator http://www.tecweb.inf.puc-rio.br/explorator
- 65. Faceted Browsers
- 69. http://sig.ma
- 70. Whats next?
- 71. Time to create new and innovative ways to interact with Linked Data
- 72. This may be one of the Killer Apps that we have all been waiting for http://en.wikipedia.org/wiki/File:Mosaic_browser_plaque_ncsa.jpg
- 73. Where can I find SPARQL Endpoints? Dbpedia: http://dbpedia.org/sparql Musicbrainz: http://dbtune.org/musicbrainz/sparql U.S. Census: http://www.rdfabout.com/sparql Semantic Crunchbase: http://cb.semsol.org/sparql http://esw.w3.org/topic/SparqlEndpoints
- 74. Querying a single dataset is quite boring compared to: Issuing SPARQL queries over multiple datasets How can you do this? 1. Issue follow-up queries to different endpoints 2. Querying a central collection of datasets 3. Build store with copies of relevant datasets 4. Use query federation system
- 75. Follow-up Queries Idea: issue follow-up queries over other datasets based on results from previous queries Substituting placeholders in query templates
- 76. Getting Started Finding URIs Finding Additional Data Finding SPARQL Endpoints
- 77. What is a Linked Data application Software system that makes use of data on the web from multiple datasets AND that benefits from links between the datasets
- 78. Characteristics of Linked Data Applications Consume data that is published on the web following the Linked Data principles Discover further information by following the links between different data sources Combine the consumed linked data with data from sources (not necessarily Linked Data) Expose the combined data back to the web following the Linked Data principles Offer value to end-users
- 79. Examples http://data-gov.tw.rpi.edu/wiki http://dbrec.net/ http://fanhu.bz/ http://data.nytimes.com/schools/schools.html http://sig.ma http://visinav.deri.org/semtech2010/
- 80. Hot Research Topics Interlinking Algorithms Provenance and Trust Dataset Dynamics UI Distributed Query
- 81. Contact PEAK Consulting United States United Arab Emirates Headquarters 11 Penn Plaza, 5th floor Unit P12 Rimal, The 90 Long Acre, Covent Garden New York, NY 1000 Walk London WC2E 9RZ United States PO Box 487 177 Dubai United Kingdom United Arab Emirates Tel: +1 (212) 946 4824 Tel: +44 (0)207 849 3422 Fax: +1 (212) 946 2801 Tel: +44 (0)207 849 Fax: +44 (0)207 990 9478 3422 Fax: +44 (0)207 990 9478 http://www.peakconsulting.eu info@peakconsulting.eu