�ݺ�ߣ

Introduc)on
?to
?Linked
?Data
?

Consuming
?Linked
?Data
?Tutorial
?
World
?Wide
?Web
?Conference
?2010
?

Do
?you
?SEARCH
?or
?do
?you
?FIND?
?

Search
?for
?

Football
?Players
?who
?went
?to
?the
?
University
?of
?Texas
?at
?Aus)n,
?played
?for
?
the
?Dallas
?Cowboys
?as
?Cornerback
?

Introduction to Linked Data - WWW2010

Why
?can��t
?we
?just
?FIND
?it��
?

Guess
?how
?I
?FOUND
?out?
?

I��ll
?tell
?you
?how
?I
?did
?NOT
??nd
?it
?

Current
?Web
?=
?internet
?+
?links
?+
?docs
?

So
?what
?is
?the
?problem?
?
?? The
?Web
?has
?problems
?
�C? People
?aren��t
?interested
?in
?documents
?
?? They
?are
?interested
?in
?things
?
?(that
?are
?in
?documents)
?
�C? People
?can
?parse
?documents
?and
?extract
?meaning
?
?? Web
?pages
?are
?wriXen
?in
?HTML
?
?? HTML
?describes
?visualiza)on
?of
?informa)on
?
?? Computers
?can��t!
?

What
?do
?we
?need
?to
?do?
?
?? We
?need
?to
?help
?machines
?to
?understand
?the
?
web
?so
?machines
?can
?help
?us
?understand
?
things
?
�C? They
?can
?learn
?what
?we
?are
?interested
?in
?
�C? They
?can
?help
?us
?beXer
??nd
?what
?we
?want
?

How
?can
?we
?do
?that?
?
?? Besides
?publishing
?documents
?on
?the
?web
?
�C? which
?computers
?can��t
?understand
?easily
?
?? Let��s
?publish
?something
?that
?computers
?can
?
understand
?

But
?wait��
?don��t
?we
?do
?that
?
already?
?

Current
?Data
?on
?the
?Web
?
?? Rela)onal
?Databases
?
?? APIs
?
?? XML
?
?? CSV
?
?? XLS
?
?? ��
?
?? Can��t
?computers
?and
?applica)ons
?already
?
consume
?that
?data
?on
?the
?web?
?

True!
?But
?it
?is
?all
?in
?di?erent
?
formats
?and
?data
?models!
?

This
?makes
?it
?hard
?to
?integrate
?
data
?

The
?data
?in
?di?erent
?
?
data
?sources
?aren��t
?linked
?

For
?example,
?how
?do
?I
?know
?that
?the
?
Juan
?Sequeda
?in
?Facebook
?is
?the
?
same
?as
?Juan
?Sequeda
?in
?TwiXer
?

Or
?if
?I
?create
?a
?mashup
?from
?
di?erent
?services,
?I
?have
?to
?learn
?
di?erent
?APIs
?and
?I
?get
?di?erent
?
formats
?of
?data
?back
?

Wouldn��t
?it
?be
?great
?if
?we
?had
?a
?
standard
?way
?of
?publishing
?data
?on
?
the
?Web?
?

We
?have
?a
?standardized
?way
?of
?
publishing
?documents
?on
?the
?web,
?
right?
?
HTML
?

Then
?why
?can��t
?we
?have
?a
?standard
?
way
?of
?publishing
?data
?on
?the
?Web?
?

Good
?ques)on!
?And
?the
?answer
?
is
?YES.
?There
?is!
?

Resource
?Descrip)on
?Framework
?
(RDF)
?
?? A
?data
?model
?
?
�C? A
?way
?to
?model
?data
?
�C? i.e.
?Rela)onal
?databases
?use
?rela)onal
?data
?model
?
?? RDF
?is
?a
?triple
?data
?model
?
?? Labeled
?Graph
?
?? Subject,
?Predicate,
?Object
?
?? <Juan>
?<was
?born
?in>
?<California>
?
?? <California>
?<is
?part
?of>
?<the
?USA>
?
?? <Juan>
?<likes>
?<the
?Seman)c
?Web>
?

RDF
?can
?be
?serialized
?in
?di?erent
?ways
?
?? RDF/XML
?
?? RDFa
?(RDF
?in
?HTML)
?
?? N3
?
?? Turtle
?
?? JSON
?

So
?does
?that
?mean
?that
?I
?have
?to
?
publish
?my
?data
?in
?RDF
?now?
?

You
?don��t
?have
?to��
?but
?we
?would
?
like
?you
?to
??
?

Document
?on
?the
?Web
?

Databases
?back
?up
?documents
?

THINGS
?have
?PROPERTIES:
?
A
?Book
?as
?a
?Title,
?an
?author,
?��
?

Isbn
? Title
? Author
? PublisherID
? ReleasedData
?
978-?�\0-?�\596-?�\153 Programming
? Toby
?Segaran
? 1
? July
?209
?
81-?�\6
? the
?Seman.c
?
Web
?
��
? ��
? ��
? ��
? ��
?

PublisherID
? PublisherName
?
This
?is
?a
?THING:
?
A
?book
?)tle
?��Programming
?the
? 1
? O��Reilly
?Media
?
Seman)c
?Web��
?by
?Toby
?Segaran,
?��
? ��
? ��
?

Lets
?represent
?the
?data
?in
?RDF
?

Programming
?the
?
)tle
?
Seman)c
?Web
?

author
?
book
? Toby
?Segaran
?
?

isbn
?
978-?�\0-?�\596-?�\15381-?�\6
?
publisher
?
name
?
Publisher
? O��Reilly
?

Remember
?that
?we
?are
?on
?the
?
web
?
Everything
?on
?the
?web
?is
?iden)?ed
?by
?
a
?URI
?

And
?now
?let��s
?link
?the
?data
?to
?other
?
data
?
Programming
?the
?
)tle
?
Seman)c
?Web
?

��ݱ�://��/ author
?
Toby
?Segaran
?
?
isbn978
?

isbn
?
978-?�\0-?�\596-?�\15381-?�\6
?
publisher
?
��ݱ�://��/ name
?
publisher1
? O��Reilly
?

And
?now
?consider
?the
?data
?from
?
Revyu.com
?
��ݱ�://��/ hasReview
? ��ݱ�://��/
review1
? isbn978
?
descrip)on
?
reviewer
?

Awesome
?
Book
?

��ݱ�://��/
name
?
reviewer
?

Juan
?
Sequeda
?

Let��s
?start
?to
?link
?data
?
? ��ݱ�://��/
review1
? isbn978
?
Programming
?the
?
descrip)on
? )tle
?
Seman)c
?Web
?
hasReviewer
? sameAs
?

Awesome
? author
?
��ݱ�://��/
Book
? Toby
?Segaran
?
?
isbn978
?

��ݱ�://��/
name
?
reviewer
? isbn
?
978-?�\0-?�\596-?�\15381-?�\6
?
Juan
? publisher
?
Sequeda
? ��ݱ�://��/ name
?
publisher1
? O��Reilly
?

Juan
?Sequeda
?publishes
?data
?too
?

hXp:// livesIn
? hXp://dbpedia.org/Aus)n
?
juansequeda.
com/id
? name
? Juan
?Sequeda
?

Let��s
?link
?more
?data
?
? ��ݱ�://��/
review1
? isbn978
?
descrip)on
?
hasReviewer
?

Awesome
?
Book
?

��ݱ�://��/
name
?
reviewer
?

sameAs
? Juan
?
Sequeda
?

hXp:// livesIn
?
juansequeda.
com/id
? name
? Juan
?Sequeda
?

And
?more
?
? ��ݱ�://��/
review1
? isbn978
?
Programming
?the
?
descrip)on
? )tle
?
Seman)c
?Web
?
hasReviewer
? sameAs
?

Awesome
? author
?
��ݱ�://��/
Book
? Toby
?Segaran
?
?
isbn978
?

��ݱ�://��/
name
?
reviewer
? isbn
?
978-?�\0-?�\596-?�\15381-?�\6
?
sameAs
? Juan
? publisher
?
��ݱ�://��/
Sequeda
? name
?
publisher1
?
O��Reilly
?
hXp:// livesIn
?
juansequeda.
com/id
? name
? Juan
?Sequeda
?

Data
?on
?the
?Web
?that
?is
?in
?RDF
?and
?
is
?linked
?to
?other
?RDF
?data
?is
?LINKED
?
DATA
?

Linked
?Data
?Principles
?
1.? Use
?URIs
?as
?names
?for
?
things
?
2.? Use
?HTTP
?URIs
?so
?that
?
people
?can
?look
?up
?
(dereference)
?those
?
names.
?
3.? When
?someone
?looks
?up
?
a
?URI,
?provide
?useful
?
informa)on.
?
4.? Include
?links
?to
?other
?
URIs
?so
?that
?they
?can
?
discover
?more
?things.
?

Linked
?Data
?makes
?the
?web
?appear
?as
?
?
ONE
?
?
GIANT
?
HUGE
?
?
GLOBAL
?
?
DATABASE!
?

I
?can
?query
?a
?database
?with
?SQL.
?Is
?
there
?a
?way
?to
?query
?Linked
?Data
?
with
?a
?query
?language?
?

Yes!
?There
?is
?actually
?a
?
standardize
?language
?for
?that
?
SPARQL
?

FIND
?all
?the
?reviews
?on
?the
?book
?
��Programming
?the
?Seman)c
?Web��
?
by
?people
?who
?live
?in
?Aus)n
?

? ��ݱ�://��/
review1
? isbn978
?
Programming
?the
?
descrip)on
? )tle
?
Seman)c
?Web
?
hasReviewer
? sameAs
?

Awesome
? author
?
��ݱ�://��/
Book
? Toby
?Segaran
?
?
isbn978
?

��ݱ�://��/
name
?
reviewer
? isbn
?
978-?�\0-?�\596-?�\15381-?�\6
?
sameAs
? Juan
? publisher
?
Sequeda
? ��ݱ�://��/ name
?
publisher1
? O��Reilly
?
hXp://
juansequeda. livesIn
?
com
?
name
? Juan
?Sequeda
?

This
?looks
?cool,
?but
?let��s
?be
?realis)c.
?
What
?is
?the
?incen)ve
?to
?publish
?
Linked
?Data?
?

What
?was
?your
?incen)ve
?to
?
publish
?an
?HTML
?page
?in
?1990?
?

1)
?Share
?data
?in
?documents
?
2)
?Because
?you
?neighbor
?was
?doing
?it
?

So
?why
?should
?we
?publish
?
?
Linked
?Data
?in
?2010?
?

1)
?Share
?data
?as
?data
?
2)
?Because
?you
?neighbor
?is
?doing
?it
?

And
?guess
?who
?is
?star)ng
?to
?
publish
?Linked
?Data
?now?
?

Linked
?Data
?Publishers
?
?? UK
?Government
?
?? US
?Government
?
?? BBC
?
?? Open
?Calais
?�C
?Thomson
?Reuters
?
?? Freebase
?
?? NY
?Times
?
?? Best
?Buy
?
?? CNET
?
?? Dbpedia
?
?? Are
?you?
?

How
?can
?I
?publish
?Linked
?Data?
?

Publishing
?Linked
?Data
?
?? Legacy
?Data
?in
?Rela)onal
?Databases
?
�C? D2R
?Server
?
�C? Virtuoso
?
�C? Triplify
?
�C? Ultrawrap
?
?? CMS
?
�C? Drupal
?7
?
?? Na)ve
?RDF
?Stores
?
�C? Databases
?for
?RDF
?(Triple
?Stores)
?
?? AllegroGraph,
?Jena,
?Sesame,
?Virtuoso
?
�C? Talis
?Plauorm
?(Linked
?Data
?in
?the
?Cloud)
?
?? In
?HTML
?with
?RDFa
?

�ݺ�ߣ

Introduction to Linked Data - WWW2010

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