Semantic Markup
0 likes1,114 views
Rajendra Akerkar discusses the difference between the current web which contains unstructured data in web documents versus the semantic web which aims to structure data to be readable by machines. Semantic markup languages like RDFa, microformats, and microdata embed structured data in web pages so they can be understood by both humans and machines. This brings the web of documents and web of data closer together. Search engines are now able to provide more relevant search results by utilizing structured data embedded in web pages.
Semantic Markup
- 2. Current Web: written mostly for humans Current Web vs. Semantic Web Unstructured data Structured data Web of documents Web of data Interesting information for machine agents exists g Example: concert events in Bergen (date, performer, venue) Problem: Web page markup does not explicitly encode information R. Akerkar 2
- 3. Embedding structured information on the same web bedd g st uctu ed o at o o t e sa e eb pages Approaches: Microformats RDFa RDF GRDDL Microdata Open Graph Protocol R. Akerkar 3
- 4. Web sites can easily reuse y content from other sites To increase organic traffic! Reasons: 1. Differentiation from the Competition 2. Help Search Engines Better Sort and Value your Content Enables site owners to mash up data from a wide variety f i ti of sources in creative ways R. Akerkar 4
- 5. 5015.jpg is a picture of a i t f hotel named Augustin The semantic markup helps machines sort the information on a Web page. p g R. Akerkar 5
- 6. A way of embedding structured information in (X)HTML documents: One page for both humans and machines Don’t need to repeat yourself Introducing new XHTML attributes http://www.w3.org/TR/xhtml‐rdfa‐primer/ Goal: Bringing the Web of Documents and the Web of Data closer together. the Web of Data closer together R. Akerkar 6
- 7. SearchMonkey makes use of RDFa and y Microformats in Search an open platform for using structured data to build more useful and relevant search results Illustrates the difference between a basic search result and the same search result enhanced with structured data. R. Akerkar 7
- 8. It is an html semantic markup (RDFa & microdata) that improves the display of search results and makes it easier for people to find the best web content. web content R. Akerkar 8
- 9. Google, Microsoft, and Yahoo Google, Microsoft, and Yahoo In early June 2011 announced schema org a new service announced schema.org, a new service intended to create and support a common vocabulary for structured data markup on web pages. The idea is to provide a library of vocabularies to embed p y machine‐readable data into web pages in a manner that h d bl d b h can be fully exploited across search engines search engines. Schema.org appears to be Linked Data Lite with h b k d h limited support for vocabularies available at schema.org/docs/full.html Microsoft, Google, Yahoo and Yandex publish intent to support RDFa Lite R. Akerkar 9
- 10. Schema.org does not use RDF as a data model instead it uses very generic Microdata supported bye HTML5 derived from RDF Schema R. Akerkar 10
- 11. The Open Graph Protocol enables you to integrate Web pages into the social graph b h l h Benefits: • To enable users to more easily find and interact with the content that you create • You’ll be able to gain valuable insights into your website visitors b it i it R. Akerkar 11
- 12. Akerkar, R. Foundations of the Semantic Web. London: Alpha Science International, 2009. D. Connolly, Gleaning Resource Descriptions from Dialects of Languages (GRDDL), http://www.w3.org/TR/grddl/ (last accessed on 08.10.2011) p // g/ /g / ( ) Dublin Core Metadata Initiative, http://dublincore.org F. Manola, E. Miller, RDF Primer, http://www.w3.org/TR/rdf‐primer/ (last accessed on 08.10.2011) Microformats, http://microformats.org (last accessed on 08.10.2011) Microformats http://microformats org (last accessed on 08 10 2011) Open Graph Protocol http://ogp.me/ (last accessed on 20.10.2011) T. Celik and K. Marcs: “Real World Semantics” http://www.tantek.com/presentations/2004etech/realworldsemanticspres.html (last accessed on 08.10.2011) ) Importance of Facebook’s Open Graph Protocol for Business Marketing. http://xebidy.com/the‐importance‐of‐facebook‐open‐graph‐protocol‐for‐business‐marketing/ (last accessed on 18.10.2011) RDFa in XHTML: Syntax and Processing, W3C Recommendation, http://www.w3.org/TR/rdfa‐ syntax/ (l / (last accessed on 08.10.2011) d 08 10 2011) Tools. RDFa Wiki, http://rdfa.info/wiki/Tools (last accessed on 10.10.2011) SearchMonkey: http://developer.yahoo.com/searchmonkey/ HTML Microdata, http://www.w3.org/TR/microdata/ R. Akerkar 12