1 of information reusability & the semantic web d a v i d h u y n h research assistant /...
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information reusability&
the semantic web
d a v i d h u y n hresearch assistant / doctoral candidate
d f h u y n h @ m i t . e d u
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brandchannel.com
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craigslist.orgmaps.google.com
html, js, css
html, js, css
housingmaps.com
html, js, css
html, js, css
web api xml
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structured data
generic, programmatic query support
html, js, css
web appdatabase
url queries
browser
unstructured data
sql http
custom, UI-based
query support
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structured data
generic, programmatic query support
unstructured datacustom,
UI-basedquery
support
structured data
generic, programmati
cquery
support
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html, js, css
html, js, css
combined user
interface
server provided features
client-augmented features
client-side
“web app”
structured data,
generic, programmatic query support
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html, js, css
html, js, css
client-sidedata-centric
mash-upuser
interface
html, js, css
client-side
“web app”
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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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html, js, css
html, js, css
combined user
interface
server provided features
client-augmented features
client-side
“web app”
structured data,
generic, programmatic query support
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html, js, css
html, js, css
client-sidedata-centric
mash-upuser
interface
html, js, css
client-side
“web app”
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html, js, css
client-sidedata-centric
mash-upuser
interface
client-side
“web app”
common data model
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• data model = XML ?
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• no
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<Invention name="Lightning Rod"> <Person name="Benjamin Franklin"> <Person name="Francis Folger Franklin" /> <Person name="Sarah Franklin" /> </Person></Invention>
<Newspaper name="Pennsylvania Gazette"> <Person name="Benjamin Franklin"> <Person name="Francis Folger Franklin" /> <Person name="Sarah Franklin" /> </Person></Newspaper>
Invention
Newspaper
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Invention Newspaper
Francis Sarah
Benjamin
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Invention Newspaper
Francis Sarah
Benjamin
has-editorhas-inventor
father-of father-of
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Invention Newspaper
Francis Sarah
Benjamin
has-editor
saves-life-of
father-of father-of
loves-to-read
funds
has-inventor
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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
generic, programmatic query support
unstructured datacustom,
UI-basedquery
support
structured data
generic, programmati
cquery
support
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scrape into RDF
html, js, css
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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 conference
iswc - http://iswc.semanticweb.org/• planet rdf – http://planetrdf.com/
• simile - http://simile.mit.edu/• haystack -
http://haystack.csail.mit.edu/
thank you