State Puppy Dog Publisher Conference Animal An ontology creates a structure within which we describe the world Person Address City Publication State Puppy Dog Publisher Conference Animal ID: 805474
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Slide1
Person
Address
City
Publication
State
Puppy
Dog
Publisher
Conference
Animal
An ontology creates a structure within which we describe the world.
Slide2Person
Address
City
Publication
State
Puppy
Dog
Publisher
Conference
Animal
An ontology creates a structure within which we describe the world.
hasState
hasCity
hasAddress
hasPet
hasPublication
hasPublisher
hasConference
Object property
ISA relation
Slide3Paea
1045 Boyer
Walla Walla
Not-gadgets
WA
Tupa
Tupa
LNCS
ODBASE’09
Paea,
Tupa
hasState
hasCity
hasAddress
hasPet
hasPublication
hasPublisher
hasConference
Object property
ISA relation
The world as we choose to see it fits within that structure.
Slide4Paea
1045 Boyer
Walla Walla
Not-gadgets
WA
Tupa
Tupa
LNCS
ODBASE’09
Paea
,
Tupa
The world as we choose to see it fits within that structure.
Slide5Data annotation, as we define it, is therefore the process of
fitting real world entities into the ontology structure.
Paea
Tupa
WAWalla Walla
Not-gadgets
LNCSODBASE’09
Slide6The power of ontologies is that the structure informs the data and vice-versa.
That is, you can infer more data than you may have started with by
extrapolating on the interplay between data and structure.
PaeaTupa
WA
Walla WallaNot-gadgets
LNCS
ODBASE’09
Tupa
Tupa
Paea
Slide7Paea
Tupa
RDF (resource description framework) is a language upon which OWL (the Web
Ontology Language) is layered. Simply put, RDF helps to specify the fundamental
structure of an ontology: which are relationships (arrows). Recall that an ontology forms a graph; well, RDF helps you write down the edges (arrows) ofthe graph. All you really need is a triple: subject (arrow start), property (arrow label), and object (arrow end).
hasPet
<
Paea
,
hasPet, Tupa>
But there’s actually more information hidden here than just the arrow you can see. The colored circles mean something too (they are “arrows” too – don’t trust the diagram!):
<Paea,
hasType, Person>
<Tupa, hasType, Dog>