information reusability

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information reusability the semantic web

• d a v i d h u y n h
• research assistant / doctoral candidate
• d f h u y n h _at_ m i t . e d u

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brandchannel.com
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html, js, css
html, js, css
craigslist.org
maps.google.com
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structured data
unstructured data
custom, UI-basedquery support
generic, programmatic query support
html, js, css
web app
database
browser
sql
http
url queries
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structured data
unstructured data
custom, UI-basedquery support
generic, programmatic query support
structured data
generic, programmaticquery support
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server provided features
html, js, css
combined user interface
client-side web app
html, js, css
client-augmented features
structured data, generic, programmatic query
support
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html, js, css
client-sidedata-centricmash-upuser interface
client-side web app
html, js, css
html, js, css
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• data behind Web sites
• users helpless
• data on users computers
• control of client-side tools
• browse (sort, filter)
• view (calendar, map)
• mash-up

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server provided features
html, js, css
combined user interface
client-side web app
html, js, css
client-augmented features
structured data, generic, programmatic query
support
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html, js, css
client-sidedata-centricmash-upuser interface
client-side web app
html, js, css
html, js, css
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client-sidedata-centricmash-upuser interface
client-side web app
html, js, css
common data model
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• data model XML ?

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• no

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Invention
ltInvention name"Lightning Rod"gt ltPerson
name"Benjamin Franklin"gt ltPerson
name"Francis Folger Franklin" /gt ltPerson
name"Sarah Franklin" /gt lt/Persongtlt/Invention
gt
Newspaper
ltNewspaper name"Pennsylvania Gazette"gt
ltPerson name"Benjamin Franklin"gt ltPerson
name"Francis Folger Franklin" /gt ltPerson
name"Sarah Franklin" /gt lt/Persongtlt/Newspaper
gt
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Invention
Newspaper
Benjamin
Francis
Sarah
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Invention
Newspaper
has-editor
has-inventor
Benjamin
father-of
father-of
Francis
Sarah
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funds
Invention
Newspaper
has-editor
has-inventor
loves-to-read
saves-life-of
Benjamin
father-of
father-of
Francis
Sarah
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• resource description framework (RDF)http//www.w3
  .org/RDF/

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• semantic web projecthttp//www.w3.org/2001/sw/

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• to create a universal medium for the exchange of
  documents data

as in the existing Web
with explicit structure and semantics
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Once upon a midnight dreary Whilst I sat
pondering weak and weary Over many a curious
volume of forgotten lore While I nodded, nearly
napping There suddenly sounded a tapping As if
someone gently rapping, Tapping on my chamber
door Only this and nothing more
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browserintegrates
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• semantic web
• global database
• structured data
• structured queries
• decentralized

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• web data more reusable
• searches more accurate
• automation more reliable

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• how do we build the semantic web?

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• chicken and egg problem

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structured data
unstructured data
custom, UI-basedquery support
generic, programmatic query support
structured data
generic, programmaticquery support
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html, js, css
scrape into RDF
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• data on client-side power to users!
• semantic web helps get data on the client-side

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• problems
• storage, query on graphs
• inference
• tools, programming paradigms
• user interface
• generic domain specific
• open world
• schema missing
• data missing, inaccurate, conflicting

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• w3c - http//www.w3.org/2001/sw/
• international semantic web conferenceiswc -
  http//iswc.semanticweb.org/
• planet rdf http//planetrdf.com/
• simile - http//simile.mit.edu/
• haystack - http//haystack.csail.mit.edu/
• thank you