July, 04 What is the Semantic Web? (A mostly pictorial tour) Prof. James Hendler Hendler@cs.umd.edu...

July, 04

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What is the Semantic Web?(A mostly pictorial tour)

Prof. James Hendler

Hendler@cs.umd.edu

http://www.cs.umd.edu/~hendler

http://www.mindswap.org

Presentations, Downloads and Demos:

July, 04

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Information Convergence

• Convergence not just in devices, also in “information”

• Your personal information (phone, PDA,…)

Calendar, photo, home page, files…

• Your “professional” life (laptop, desktop, … Grid)

Web site, publications, files, databases, …

• Your “community” contexts (Web)

Hobbies, blogs, fanfic, social networks…

• The Web teaches us that people will work to share

• How do we CREATE, SEARCH, and BROWSE in

the non-text based parts of our lives?

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Getting there: Make Web content more “machine-readable!”

Lassila et al, 2002

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The Semantic Wave

(Berners-Lee, 03)

YOUARE

HERE

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Now.• RDF, RDFS and OWL are ready for prime time

• Designs are stable, implementations maturing

• Major Research investment translating into application development and commercial spinoffs• Adobe 6.0 embraces RDF• IBM releases tools, data and partnering• HP extending Jena to OWL• Tucana announces results for 1B triple queries• Proprietary OWL ontologies for vertical markets

• c.f. pharmacology, HMO/health care, ... Soft drinks

• Several new starts in SW space

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Now: huge potential

• Data integration identified as $100Bs world-wide market• with significant govt interest creating a user-pull

• Ontology development efforts, in OWL, aimed at information mgt ongoing in US govt include– NIST, NLM, EPA, DHS, DoD, DOJ, FDA, NIH, USGS,

NOAA

• Huge potential follow-on market - EAI for the small business• making external data and info resources integrable

• Could do for integration what Visicalc (excel) did for report generation

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Now: Tools for tool builders

• Like the pre-MOSAIC WWW…• …but, it is much easier to get started than it was

even a year ago,• Parsers, APIs, triple-stores

• http://www.daml.org/tools• http://www.w3.org/RDF

• End to end no longer takes a “miracle” • Prototype OWL website took three undergraduates about 1

month.

• End user tools just starting to emerge• “Metaphors” growing

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Tools for markup...

PhotoStuff Demo

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Not tied to specific domains

Photo from Grecia

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Not tied to specific domains

Photo from Grecia

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Semantic Web Application Portals

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Info views…

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Not tied to specific domains

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Not tied to specific domains

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Not tied to specific domains

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With Info Contexts

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Shared calendars

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Calendar + photos + …

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Social networks:e.g. Friend of a Friend (FOAF)

• Say stuff about yourself (or others) in OWL files, link to who you “know”

<foaf:Person> <foaf:name>Jim Hendler</foaf:name> <foaf:title>Dr</foaf:title> <foaf:firstName>Jim</foaf:firstName> <foaf:surname>Hendler</foaf:surname> <foaf:mbox_sha1sum>

be972c7a602683f7cf3c7a1fd0949c565debe4d3 </foaf:mbox_sha1sum> <foaf:homepage rdf:resource="http://www.cs.umd.edu/~hendler"/> <foaf:depiction rdf:resource="http://www.semanticgrid.org/q-iantbljim.jpg"/> <foaf:workplaceHomepage rdf:resource="http://owl.mindswap.org"/> <foaf:knows>http://www.cs.umd.edu/~jen/foaf.rdf</foaf:knows> </foaf:Person>

Estimates of the number of Foaf users range from 2M-5M

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Using FOAF in other contexts

http://trust.mindswap.org

Jennifer Golbeck

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Coming sooner than you may think…

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… and this…

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…and this?

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Emerging:Semantic Web Services

Information management capabilities Discovery, Filtering, Composition

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Semantics and servicesinput xsd:complex=”oncogene”

output xsd:complex=”RiskType”

Oncogene(MYC): Found_In_Organism(Human). Gene_Has_Function(Transcriptional_Regulation). Gene_Has_Function(Gene_Transcription). In_Chromosomal_Location(8q24). Gene_Associated_With_Disease(Burkitts_Lymphoma).

<owl:Class rdf:about="http://annotation.semanticweb.org/iswc/iswc.daml#RiskIndicator"> <rdfs:subClassOf> <owl:Restriction> <owl:onProperty rdf:resource="http://annotation.semanticweb.org/iswc/iswc.daml#name"/> <owl:allValuesFrom rdf:resource="http://www.w3.org/2000/10/XMLSchema#string"/> </owl:Restriction> </rdfs:subClassOf> </:Class>

OWL-S grounding (coming to WSDL 2.0)

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Get a B&N price (In Euros)

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Of a particular book

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In its German edition?

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Later: Automated composition

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Longer term?: Adding Proof

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The “Policy Aware Web”

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Conclusion• The Semantic Web is here

• The question isn’t if, but “how much”

• Semantic Web technologies have a promising future and an

exciting potential

• The business case is emerging

• Enterprise integration on the Web

• Database, image, and services as 1st class Web citizens

• Portal technology “in the small”

• The future feed is exciting

• Rules and Proof -> “Policy Aware” Web

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MIND SWAP• Maryland Information and Network Dynamics Laboratory,

Semantic Web and Agents Project• J. Hendler• B. Parsia• Jennifer Golbeck• Aditya Kalyanpur• David Wang• Daniel Krech• Evren Sirin

• Corporate Research Partners: • Fujitsu Laboratory of America, College Park• Lockheed Martin Advanced Technology Laboratories• NTT Corp• SAIC Corp., Kevric Corp, Top Quadrant, Tucana, Semaview

• Govt Funding:• US Army Research Laboratory, NSF, DARPA, DoD, NIST,

• http://www.mindswap.org (OWL-powered Semantic Web page)

• Ronald Alford• Jordan Katz• Amy Alford• Matt Westhoff• Kendall Clark• Nada Hashmi