Contacts

• Intro to SPARQL: link 1, querying over LOD link, older slides link,
  
• DBPedia
  DBPedia: machine readable version of Wikipedia, RDF data format, available SPARQL endpoint.
  Several language mutations English, Czech
  Plenty of other datasets, not always SPARQL available. list of datasets.
• How to travers DBPedia
  Start from Wikipedia + modify URL (wiki => resource), traverse through pages
  . DBPedia has ontology (not very usefull: duplicity, redundancy, outdated) - search for rdf:types
  - browse entities of given type
  - describe entity, compare with original wiki page
  - SPARQL queries - visualize relations
• SPARQL query constructions
  - What dit Ivan Olbracht wrote? //basic graph patterns
  - What did the autor of R.U.R. wrote, when and what are the genre of these works? //complex graph patterns, optional
  - Where were Sci-FI authors born, most often? //group by, order by
  - Which larger towns (above 20000 inhabitants) are in Southern-bohemia shire? //filter (numerical)
  - What are the professions of persons named "Zeman"? //filter (regex)
  - Which actors shot most succesful movies? Movies with highest profit? //basic arithmetics, order by, group by, BIND
  

What else do you want to know