yahoo7 semantic web presentation
DESCRIPTION
Yahoo7 Open Night Semantic Web presentation by Paul WhiteTRANSCRIPT
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Semantic WebPaul White
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Yahoo!7 Proprietary and Confidential
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The Problems● Yahoo!7 is known for having great breadth of content, but not depth
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The Problems● Content is silo’d across different sites and knowledge domains
● Users get stuck in these property silos
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The Problems● Site structure doesn’t allow for natural human browsing patterns
● Visitors browse by content, not type
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The Tech● So, what do we use to solve these problems? It’s all about relationships!
● Resource Description Framework (RDF)
○ Basic building block of the Semantic Web
○ Consistent format for representing data
○ Triples: Subject -> Predicate -> Object
Predicate:Portrays
Predicate:Character In
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● Web Ontology Language (OWL)
○ Ontologies - everything else!
○ What is a TV Show
○ What is an Actor
○ What is a Sporting Event
○ What are their relationships?
The Tech
● RDF Schema
○ Basic data types
○ Classes/Subclasses
○ Property (Predicates)
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The Tech● Graphs
Portrays
Yahoo!7 TV
Character In
born inis a
Winners and Losers
Melbourne Cup Carnival
TV Show
Sporting Event
Social EventYahoo!7 Sport
Yahoo!7 Lifestyle
Derby Day Crown Oaks
Adelaide Matt Kingston
spouse
DBPedia
is a
Attended
is a
an event in
Predicate
Subject / Object
Legend
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The Tech● Storage
● Built specifically for storing and reading graph data
● Stores everything - data, metadata, schemas, ontologies
● Allows for inferencing - e.g.
○ Sporting Event subclassOf Event
○ Melbourne Cup Festival subclassOf Sporting Event
therefore
○ Melbourne Cup Festival subclassOf Event
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● Query Language
● Designed for querying triples
CONSTRUCT { ?Actor portrays ?Character }
WHERE { ?Actor portrays ?Character }
Results in
Melanie Vallejo portrays Sophie Wong ;
Ray Meagher portrays Alf Stewart ;
Hayden Christensen portrays Anakin Skywalker ;
Hayden Christensen portrays Darth Vader .
The Tech predicate?Variable
Legend
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The Tech
● Named Entity Recognition
● Specialised branch of Natural Language Processing
● Generate annotations that link from this thing to that thing
● Two steps
○ Name Recognition
○ Entity Classification
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The Results● Show Silos broken down
X-Factor Content Stream - Luke Jacobz Home and Away Content Stream - Luke Jacobz
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The Results● Sites are now structured to surface related content
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The Results● Automatic Discovery and hyperlinking of Named Entities
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Questions?