Semantic Web, a general overview
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This document provides an overview of the semantic web and its evolution from Web 1.0 to Web 3.0. It discusses the transition to a web of linked, structured data and the key issues around information retrieval, extraction, and maintenance of semantic data on the web. It also outlines the stack of technologies needed for open linked data and provides an example of open data implementation in Rimini, Italy.
Semantic Web, a general overview
- 1. Giacomo Bartoli 795161 Academic year 2016/17 MSc in Computer Science & Engineering - University of Bologna Semantic Web, a general overview
- 2. Outline • From Web 1.0 to Web 3.0 • Towards a Web of Data • Main issues: IR, Extraction, Maintenance, Privacy • Topics involved • Open Linked Data: stack of technologies • Real case: Rimini Open Data website
- 3. From Web 1.0 to Web 3.0 Web 1.0 mainly static and considered as a simple virtual library. First website is still online: http://info.cern.ch Web 2.0 dynamic and used by most of the people. - Social Networks - Blogs - Forums - Community Technologies that made is possible: php, Ajax, CSS, Js
- 4. From Web 1.0 to Web 3.0 Web 3.0 Everyone has access to the Web. Internet is the medium for organising, planning any kind of activity: from a dinner’s out to online business. This clearly rises some issues: • How do we handle all these information? • Are search engines always able to retrieve what we are looking for?
- 5. Towards a Web of Data Web of Data The aim is to have linked, structured data that can be exposed according to a common standard. Data must be machine readable: this will lead to a new knowledge. Many of these data are still available but without a proper organization is not possible to retrieve them correctly.
- 6. Web of Data: topics Related topics to the Web of Data’s vision: • Linked Data • Vocabularies • Inference • Vertical Applications • Query
- 7. Web of Data: issues We still need to face some issues: • Information Retrieval • Information Extraction • Maintenance • Privacy
- 8. Stack of Technologies Open Linked Data requires a set of technologies that can be summed up by the following “layer cake”:
- 10. SW: a real case scenario Open Data in Rimini (Italy) • divided by categories • divided by tags • 48 datasets available • xml, csv, txt, json http://dati.comune.rimini.it
- 11. References 1. Personal notes taken during lectures by Prof. Antonella Carbonaro 2. Gartner’s official website, https://www.gartner.com 3. Wikipedia, https://it.wikipedia.org/wiki/Pagina_principale Credits Giacomo Bartoli mat. 795161 giacomo.bartoli3@studio.unibo.it