Introductie Linked Open Data en KB Dataspace

1. KB DataSpace
door
Roland Cornelissen
`

2. KB DataSpace
Geschiedenis:
NBC+ project
DBpedia NL
LOD ontwikkelingen
HackaLOD

3. KB DataSpace:

4. KB DataSpace:
Virtuoso Open Source (triple store):
“Virtuoso Universal Server is a middleware and database
engine hybrid that combines the functionality of a
traditional RDBMS, ORDBMS, virtual database, RDF,
XML, free-text, web application server and file server
functionality in a single system.”

5. KB DataSpace:
HTTP URI resolving:
Internet = TCP/IP,HTTP,FTP,SMTP,URL,etc...
Hyper Text Transfer Protocol:
“The Hypertext Transfer Protocol (HTTP) is an application
protocol for distributed, collaborative, hypermedia information
systems. HTTP is the foundation of data communication for
the World Wide Web.”

6. KB DataSpace:
URI = Uniform Resource Identifier
URL == URI maar URI =/= URL
IRI == URI maar URI =/= IRI
IRI
URI
URL

7. KB DataSpace:
Content negotiation:
“Content negotiation is a mechanism defined in the HTTP
specification that makes it possible to serve different
versions of a document (or more generally, a resource
representation) at the same URI, so that user agents can
specify which version fit their capabilities the best.”

8. KB DataSpace:
Linked Open Data = RDF data + eisen:
★ make your stuff available on the Web (whatever
format) under an open license
★★ make it available as structured data (e.g., Excel
instead of image scan of a table)
★★★ use non-proprietary formats (e.g., CSV instead of
Excel)
★★★★ use URIs to denote things, so that people can
point at your stuff
★★★★★ link your data to other data to provide context

9. KB DataSpace:
RDF data = triples
<subject> <predicate> <object>

10. KB DataSpace
LOD maken in 3 stappen:

11. KB DataSpace:
Data conversie
Van record naar resource.
Conversie door 'mappings':
EDBO
SGD
ANP
Conversie door SPARQL UPDATE:
NBC+ data (GGC):
Titels, NTA, Brinkman, GTT, etc

12. KB DataSpace:
SPARQL UPDATE
Rauwe data methode:
OAI harvest NBC+ GGC data, bvb:
p:860075672 v:001A0 "1007:10­01­86" ;
v:001B0 "1007:29­05­86" ;
v:001Bt "00:00:00.000" ;
v:001D0 "9999:99­99­99" ;
v:002­0 "Gcx" ;
v:003­0 "860075672" ;
v:010­a "ned" ;
v:011­a "1970" ;
v:011­n "P 1970­..." ;
v:019­a "nl" ;
v:021Aa "­Zingen in de kring" ;
v:034Da "4 dl" .
Vervolgens data opwaarderen met SPARQL UPDATE,
bvb:

13. KB DataSpace:
SPARQL UPDATE
### Werken ###
# type en ppn
SPARQL
INSERT INTO GRAPH <http://lod.kb.nl/nbc/>
{
?s rdf:type schema:CreativeWork .
?s dcx:ppn ?ppn .
}
WHERE { GRAPH <http://lod.kb.nl/nbcoai/> {
?s pica:002­0 ?type .
?s pica:003­0 ?ppn .
FILTER REGEX(str(?type), "Tw")
}};

14. KB DataSpace:
SPARQL UPDATE
## Labels leading dash correction
SPARQL
INSERT INTO GRAPH <http://lod.kb.nl/nbc/> {
?s rdfs:label ?label .
?s dcterms:title ?label .
}
WHERE { GRAPH <http://lod.kb.nl/nbcoai/> {
?s pica:002­0 ?type .
?s pica:021Aa ?l .
FILTER REGEX(str(?type), "(Oa|Ob|Aa|AA|aa|aA|Ab|Ac|Af|AF|As|
Tw)")
FILTER REGEX (?l,'^­' )
BIND(SUBSTR(str(?l),2,fn:string­length(?l)­1) AS ?label)
}};

15. KB DataSpace
Datasets

16. KB DataSpace
Links
dataset 1 dataset 2 link aantal links
NTA (VIAF nr.) VIAF owl:sameAs 1467773
NTA (VIAF nr.) Wikidata owl:sameAs 96852
NTA (VIAF nr.) DBpedia Duits owl:sameAs 40114
NTA (VIAF nr.) DBpedia Engels owl:sameAs 37695
NTA (VIAF nr.) DBpedia NL owl:sameAs 3577
NBC E-books Gutenberg owl:sameAs 43601
NBC Brinkman DBpedia NL owl:sameAs 10217
NBC GTT DBpedia NL owl:sameAs 29177
NBC Brinkman NBC GTT owl:sameAs 6284
NBC Corporaties DBpedia NL owl:sameAs 10067
NTA (label) DBpedia NL skos:exactMatch 50448
NTA (label) DBNL rdfs:seeAlso 1136
NBC Corporaties NBC GTT owl:sameAs 2164

17. KB DataSpace
Datasets & Links

18. KB DataSpace:
De LOD cyclus:

19. KB DataSpace:
Data authoring (bewerken)
OntoWiki;
“OntoWiki facilitates the visual presentation of a
knowledge base as an information map, with
different views on instance data. It enables
intuitive authoring of semantic content, with an
inline editing mode for editing RDF content,
similar to WYSIWIG for text documents.”