Semantic Web and the Social Web
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The document discusses the relationship between the semantic web and social media, highlighting the evolution from Web 1.0 to Web 3.0 and the role of user-generated content and metadata. It explains key concepts such as RDF, schemas, and the importance of a structured approach for data integration and querying. It also identifies challenges and requirements for the semantic web's success, including improved standards and smarter technologies.
Semantic Web and the Social Web
- 2. Semantic web and the social web Robin Fay, robinfay.net October 2009 Find me at robinfay.net, facebook, twitter, linkedin, youtube, blogger, slideshare, etc. Aka georgiawebgurl
- 3. Semantic web and the social web Brief introduction All materials available at http://del.icio.us/georgiawebgurl/semantic_web_presentation Semantic web Introduction A little terminology Examples Social media and the semantic web Challenges of the semantic web Robin Fay, robinfay.net, 2009/10
- 4. Semantic web and the social web Social media/social networking/social web Focus is on providing a user centered experience Content created by users Metadata frequently created by users in the form of assigning rights (creative commons such as at flickr), assigning metadata (tags, description) and more. read/write web Semantic web, aka Web 3.0 Focus on data and harvesting Machine driven; rules based Relies on structure Portal/personal web Early early stages Robin Fay, robinfay.net, 2009/10
- 6. Semantic web and the social web So: Web 1.0 = we used the web as a tool primarily html based; few database driven sites; little interactivity Web 2.0 = we interacted, enhanced, and controlled our experience Many database driven websites, search engines within websites, widgets, highly customizable Web 3.0 = we teach it, it learns Robin Fay, robinfay.net, 2009/10
- 7. Semantic web and the social web The web as we know it (and think of it) links together documents (html, pdf, dynamic documents created from databases, etc.) The Semantic web links together data. Robin Fay, robinfay.net, 2009/10
- 8. Semantic web and the social web At its core, the semantic web comprises: a set of design principles, collaborative working groups , and a variety of enabling technologies. Some elements of the semantic web are expressed as prospective future possibilities that are yet to be implemented or realized Other elements of the semantic web are expressed in formal specifications (wikipedia, 2009) Robin Fay, robinfay.net, 2009/10
- 9. Semantic web and the social web Robin Fay, robinfay.net, 2009/10 Many terms associated with the Semantic Web are used or based upon information architecture, database, and information science fields RDF = Resource Description Framework RDFS = Resource Description Framework Schema OWL = Web Ontology Language URI = Uniform Resource Identifier
- 10. Semantic web and the social web RDF = Resource Description Framework is a general-purpose language for representing information in the Web (a metadata data model ) is a W3C specification is a conceptual description is based upon making statements about web resources (triplets) More or less : XML Think sentence structure : subject – predicate(verb)-object My dog eats dogfood. Robin Fay, robinfay.net, 2009/10 A few examples
- 11. Semantic web and the social web Robin Fay, robinfay.net, 2009/10 RDF concept
- 12. Semantic web and the social web W3C model Simple RDF concept markup
- 13. Semantic web and the social web So, we have the framework, but how do we apply it? RDFS = Resource Description Framework Schema A schema is outline : a schematic or preliminary plan A structure described in a formal language supported by the database management system ; in a relational database [such as MySQL), the schema defines the tables, the fields in each table, and the relationships between fields and tables. a description of the structure and rules a document must satisfy for an XML document type http://tinyurl.com/yj442vr (define: schema -- google) Robin Fay, robinfay.net, 2009/10
- 14. Semantic web and the social web Popular choices for schemas include Creative Commons: embeds RDF into mp3s FOAF (Friend of Friend) : address books, contact lists, etc. MusicBrainz: music CD information DC (Dublin Core): multi-format, cross domain RDF Site Summary: anything with a RSS Schemas are sometimes called vocabularies There are many, many schemas…. Robin Fay, robinfay.net, 2009/10 A couple of examples
- 15. Semantic web and the social web Robin Fay, robinfay.net October 2009 FOAF
- 16. Semantic web and the social web Robin Fay, robinfay.net, 2009/10 … okay so that doesn’t look so bad.... …. Very Simple Dublin Core in RDF FOAF + DC
- 17. Semantic web and the social web Robin Fay, robinfay.net, 2009/10 OWL = Web Ontology Language invented to link ontologies (classification systems) Attempts to define objects and their relationships Different “flavors” “ interpreted as a set of "individuals" and a set of "property assertions" which relate these individuals to each other” (wikipedia 2009)
- 18. Semantic web and the social web Robin Fay, robinfay.net, 2009/10
- 19. Semantic web and the social web It all fits together, though…. Being that this is data driven, we can query, using SPARQL, a standard query language. It all fits together except….
- 20. Semantic web and the social web Robin Fay, robinfay.net, 2009/10 Who is going to create all of this new data? Libraries, museums, and other resources already have huge record sets of structured data for their resources. Many social networking sites (del.icio.us, flickr, etc.) create metadata.
- 21. Semantic web and the social web Robin Fay, robinfay.net, 2009/10 The social web is collaborative and a mix of human and machine derived data For example, tags are assigned by humans, yet data about those tags is assigned by machines diagram source: http://web2.wsj2.com/
- 22. Semantic web and the social web Robin Fay, robinfay.net 2009/10 Drupal (opensource content management system) is adding semantic web features ; Wordpress has a SIOC plugin dbpedia is a project from wikipedia SIOC (Semantically –linked Online Communities) is the semantic web model for social media websites ; attempts to connect forums, blogs, & more ..but can this happen? Really?
- 23. Semantic web and the social web Robin Fay, robinfay.net 2009/10 The social web/social media/social networking is about people. Its focus has been less on standards, controlled vocabularies, RULES…. After all, here comes everybody… ..but that is not exactly true. In order for blog posts to display sequentially, in order for discussions to be threaded, there must be an underlying order – a structure -- rules.
- 24. Semantic web and the social web Robin Fay, robinfay.net 2009/10 Much of the technology (databases, servers, etc.) already exists – at least for the initial stages of the semantic web. A great deal of the criticism of the semantic web hinges on either artificial intelligence OR on human inability – in other words, the computers can’t learn and we won’t code correctly for the computers, either.
- 25. Semantic web and the social web Robin Fay, robinfay.net October 2009 In order for the semantic web to reach its potential: We need smarter computers. We need better web standards. We need a better behind-the-scenes structure (RDF). We need more built in metadata generation tools on social networking sites. We’ll need better search engines
- 26. Semantic web and the social web Robin Fay, robinfay.net October 2009 Let’s look at a few semantic search engines http://hakia.com/ http://www.exalead.com/search/ http://www.yr-bcn.es/demos/microsearch/
- 27. Semantic web and the social web Robin Fay, robinfay.net October 2009 Questions? Thoughts? Many many links @ http://del.icio.us/georgiawebgurl/semantic_web Presentation also at slideshare.net/robinfay/