1. Rajendra Akerkar

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
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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
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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
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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
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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
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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.
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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
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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
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10.  Schema.org does not use RDF as a data model instead it
uses very generic Microdata supported bye HTML5 derived
from RDF Schema
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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
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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/
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