Rdf Modeling For Oxford University
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- Pages: 13
RDF
for
modelling
Oxford
University
OxPoints the old System
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
2
A typical OxPoints record
Blackfriars
<event
when="1221"
type="officialstatus">
<event
when="1921"
type="officialstatus">
Indirect
relaQonship
with
parent
element
Lodge
‐1.2603700160980225
51.756916532903084
<note>recorded
by
Janet
McKnight
12/15/2008
Arno
MiAelbach
RDF for modelling Oxford University
3
The new OxPoints: Requirements • We want to get informaQon about – colleges, units, departments, etc. – buildings, rooms, etc. – relaQons: ownership, usage, ect. – events: foundaQon, etc. – many other things
Resources
• We want to be able to – Draw maps – Draw historical maps – And many other cool things 12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
4
Resource DescripQon Framework (RDF) subject #blac
predicate dc:Qtle
object „Blackfriars“
#lodge
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
5
RDF Basics • Make asserQons about resources • Resources are idenQfied by URIs • AsserQons are made in the form of triples • Subject, predicate, object • Only binary relaQons expressable • But, n‐ary relaQons can be broken down into several binary relaQons
• Many syntaxes – Graph syntax, XML, N‐Tripel
• Standardized query language: SPARQL 12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
6
RDF and dimensional data subject
predicate foaf:knows
#ted
2000
object
2007
2014
#leyla
2021
2028 Qme
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
7
RDF and dimensional data subject
predicate
object
rel:spouseOf
#ted
#leyla
foaf: know s
#elizabeth
2000
2007
2014
2021
2028 Qme
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
8
RDF and dimensional data subject
predicate
object
foaf:knows
#ted
rel:sp
#leyla
ouse O
f
#elizabeth
2000
2007
2014
2021
2028 Qme
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
9
RDF and dimensional data 2007‐2014
rel:spouseOf
#ted
#leyla
2014‐…
rel:spouseOf #elizabeth
2000
2007
2014
2021
2028 Qme
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
10
RDF: InterpretaQon using models subject #ants
predicate
object
ex:hasLegs
6
„Qny“
A world in which only ants exist and where ants are Qny things with 6 legs is a model for this graph. However, if ants in this world happen to have 8 legs, then the world is not saQsfying the graph. 12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
11
RDF and dimensional data • An RDF Graph describes one truth – and only one truth
• No built‐in mechanism for describing dimensional data (such as changes over Qme) • If you follow the RDF specificaQon – RDF does not support any sort of dimensional data
• But: We think there is a way! 12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
12
InteresQng Links • Erewhon project site: – hAp://erewhon.oucs.ox.ac.uk/
• RDF Primer: – hAp://www.w3.org/TR/rdf‐primer/
• RDF SpecificaQon: – hAp://www.w3.org/RDF/
• Our thoughts on RDF and Qme + introducQon to RDF: – hAp://oxforderewhon.wordpress.com/
• SPARQL specificaQon: – hAp://www.w3.org/TR/rdf‐sparql‐query/ 12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
13
OxPoints the old System
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
2
A typical OxPoints record
RDF for modelling Oxford University
3
The new OxPoints: Requirements • We want to get informaQon about – colleges, units, departments, etc. – buildings, rooms, etc. – relaQons: ownership, usage, ect. – events: foundaQon, etc. – many other things
Resources
• We want to be able to – Draw maps – Draw historical maps – And many other cool things 12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
4
Resource DescripQon Framework (RDF) subject #blac
predicate dc:Qtle
object „Blackfriars“
#lodge
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
5
RDF Basics • Make asserQons about resources • Resources are idenQfied by URIs • AsserQons are made in the form of triples • Subject, predicate, object • Only binary relaQons expressable • But, n‐ary relaQons can be broken down into several binary relaQons
• Many syntaxes – Graph syntax, XML, N‐Tripel
• Standardized query language: SPARQL 12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
6
RDF and dimensional data subject
predicate foaf:knows
#ted
2000
object
2007
2014
#leyla
2021
2028 Qme
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
7
RDF and dimensional data subject
predicate
object
rel:spouseOf
#ted
#leyla
foaf: know s
#elizabeth
2000
2007
2014
2021
2028 Qme
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
8
RDF and dimensional data subject
predicate
object
foaf:knows
#ted
rel:sp
#leyla
ouse O
f
#elizabeth
2000
2007
2014
2021
2028 Qme
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
9
RDF and dimensional data 2007‐2014
rel:spouseOf
#ted
#leyla
2014‐…
rel:spouseOf #elizabeth
2000
2007
2014
2021
2028 Qme
12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
10
RDF: InterpretaQon using models subject #ants
predicate
object
ex:hasLegs
6
„Qny“
A world in which only ants exist and where ants are Qny things with 6 legs is a model for this graph. However, if ants in this world happen to have 8 legs, then the world is not saQsfying the graph. 12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
11
RDF and dimensional data • An RDF Graph describes one truth – and only one truth
• No built‐in mechanism for describing dimensional data (such as changes over Qme) • If you follow the RDF specificaQon – RDF does not support any sort of dimensional data
• But: We think there is a way! 12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
12
InteresQng Links • Erewhon project site: – hAp://erewhon.oucs.ox.ac.uk/
• RDF Primer: – hAp://www.w3.org/TR/rdf‐primer/
• RDF SpecificaQon: – hAp://www.w3.org/RDF/
• Our thoughts on RDF and Qme + introducQon to RDF: – hAp://oxforderewhon.wordpress.com/
• SPARQL specificaQon: – hAp://www.w3.org/TR/rdf‐sparql‐query/ 12/15/2008 Arno MiAelbach
RDF for modelling Oxford University
13
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