Transcript Slides - Book and Byte

Digital Media Technology
Week 13: LOD and Visualisation
Peter Verhaar
“The deep web”
Client-side interface made
for you
LeidenUniversity.
University.The
Theuniversity
universitytotodiscover.
discover.
Leiden
SQL
PHP
http
database
server
HTML
HTML
client
Conversion from data to linear text
(Cf. Manovich: databases vs. narratives)
BOOK_ID
TITLE
ISBN13
1
To Kill a Mockingbird
9780446310789
2
The Great Gatsby
9781853260414
subject: “Book-ID”
Predicate: “hasISBN13”
Object: “9780446310789”
subject: “Book-ID”
Predicate: “hasTitle”
Object: “To Kill a Mockingbird”
The Semantic web
□ Envisaged by Tim Berners-Lee as “a
web of data that can be processed
directly and indirectly by machines”
□ RDF-Triples
http://lod-cloud.net/
dbPedia
Nano-Publications
Semantic Publishing
STCN SPARQL Endpoint
SPARQL
□ Simple Protocol AND RDF Query
Language
□ “SQL” for Linked Open Data
□ E.g.
SELECT *
WHERE {
?book dc:type schema:Book.
?book dc:title ?titel.
?book dc:publisher ?p.
?p skos:prefLabel "Elzevier,
Bonaventura".
}
Result of SQL-query
Visualisation code library
Visualisation code libraries
□ Google Charts
□ D3.js
Definitions of visualisation
□ Distinction between “scientific
visualisation” and “information
visualisation”
□ Lev Manovich: “a mapping
between discrete data and a visual
representation” (p. 2)
□ Conversion to a graphic modality
Graphical modality
□ Jacques Bertin, Semiology of Graphics
Source: http://www.infoviswiki.net/
□ Leland Wilkinson, Grammar of Graphics