====== RDF ======
===== Before the lab =====
See [[.:rdf1]].
===== Lab instructions 2 =====
==== semantic vocabularies ====

Predefined properties for describing some domain are called semantic vocabularies.

   - Have a look at [[http://www.w3schools.com/rdf/rdf_dublin.asp|rdf_dublin]] for describing documents.
      * create a dublin core file for your favourite book
   - Read about the [[http://www.foaf-project.org/original-intro| Friend of a Friend]] project
      * create your own foaf file as directed on the page [[http://wiki.foaf-project.org/w/FoafExamples| Foaf Examples]]
      * add at least ten friends of yours - give at least information about their e-mail addresses, homepages and age.  
      * for start you can use [[http://www.ldodds.com/foaf/foaf-a-matic| foaf-a-matic]]  to create minimalFoafDocument
==== SPARQL ====
=== Reading ===
   * [[http://jena.sourceforge.net/ARQ/Tutorial/ | SPARQL tutorial]]
   * [[http://www.w3.org/2004/Talks/17Dec-sparql/intro/all.html | Introduction To RDF Query With SPARQL ]]
   * [[http://www.w3.org/TR/rdf-sparql-query/| Documentation from w3.org ]]

=== Basics ===

   - Go to the [[http://hyperdata.org/sparql/demo/| sparql demo page]], analyze and run existing examples
   - Run [[http://www.ldodds.com/projects/twinkle/| Twinkle ]] (**on charon: type ''twinkle'' in a terminal**) and execute queries on your foaf file to retrieve :
      * friends who have name and e-mail defined
      * friends who have name and e-mail defined and optional homepage
      * friends who have name and e-mail defined and optional homepage, sorted by name descending
      * friends whose name starts with 'K'
      * friends who are older than 18 years old
      * friends whose name starts with 'K' or are older than 18 years old, make search caseinsensitive
      * friends having e-mails on student.agh.edu.pl server
      * name of friends, who have homepage or e-mail on student.agh.edu.pl server

=== DBpedia===


   - Analyze and run example queries from  [[http://wiki.dbpedia.org/OnlineAccess| here ]]
   - Ask DbPedia about:
      * Universites in Krakow
      * Polish football players


===== Komentarze =====

Z braku lepszego miejsca tutaj studenci wpisują komentarze natury ogólnej do tego lab. 8-)