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The missing feedback loop is considered the reason for broken Data Cycles on current Linked Open Data ecosystems. Read-Write platforms are proposed, but they are restricted to capture modifications after the data is released as Linked Data. Triggering though a new iteration results in loosing the data consumers’ modifications, as a new version of the source data is mapped, overwriting the currently published. We propose a prime solution that interprets the data consumers’ feedback to update the mapping rules. This way, data publishers initiate a new iteration of the Data Cycle considering the data consumers’ feedback when they map a new version of the published data.
Citation preview
RDF Mapping Rules Refinements according to Data Consumers’ Feedback
RML is a generic language, extending the
W3C R2RML language, for defining rules to
map data in heterogeneous formats to the
RDF data model. RML mappings themselves
are graphs. http://semweb.mmlab.be/rml
http://semweb.mmlab.be • iminds.be
Anastasia Dimou, Miel Vander Sande, Tom De Nies, Erik Mannens, Rik Van de Walle
{firstname.surname}@ugent.be Ghent University – iMinds – Multimedia Lab
<Dep> …
<Person>
<Name>Bill></Name>
<Surname>Gates</Name>
<income>10000</income>
</Person>
… </Dep>
<http://ex.com/Gates>
a foaf:Person;
ex:income "100000".
<#PersonMap>
rr:subjectMap [
rr:template "http://ex.com/{/Dep/Person/Surname}" ;
rr:class foaf:Person ] ;
rr:predicateObjectMap [ rr:predicate ex:income ;
rr:objectMap [ rml:reference "/Dep/Person/income" ]].
<#PersonMap>
rr:subjectMap [
rr:template "http://ex.com/{/Dep/Person/Surname}" ;
rr:class foaf:Person ] ;
rr:predicateObjectMap [
rr:predicate ex:income ;
rr:objectMap [ rml:reference "/Dep/Person/income"
rr:datatype xsd:double]]
<#PersonMap>
rr:subjectMap [
rr:template "http://ex.com/{/Dep/Person/Name}" ;
rr:class ex:Person ];
rr:predicateObjectMap [ rr:predicate ex:income ;
rr:objectMap [ rml:reference "/Dep/Person/income" ]].
R&Wbase
writes
da
ta C
ON
SU
ME
RS
<http://ex.com/Bill>
a ex:Person ;
ex:income "100000".reads
da
ta O
WN
ER
S
mapsgenerates
refines
Primary resource
maps
new
version
<Dep> …
<Person>
<Name>Bill></Name>
<Surname>Gates</Name>
<income>20000</income>
</Person>
… </Dep>
Primary resource
generates<http://ex.com/Gates>
a foaf:Person;
ex:income "200000".
<http://ex.com/Gates>
ex:income
"200000"^^xsd:double.
refines
PROV-O
PROV-O
PROV-O
PROV-O
reads
writesAp
pli
cati
on
sU
sers
A triple is generated by the data owner.
The triple is modified by a data consumer.
The triple’s provenance information (PROV-O)
indicates the RML mapping that generated it.
The RML mapping is refined according to
the data consumer’s modifications.
The next time an updated version of the primary
source is mapped, the updated RML mapping
applies also the data consumer’s refinements.
Published
Linked Data
RML
mapping rules
R&Wbase is an interpretation layer built on
top of SPARQL endpoints that stores
different deltas in a single graph, allowing
simple resolving of different versions.
R&Wbase can track all changes made to the
generated triples. http://rawbase.github.io
