====== Semantic Web Applications: Semantic Wikis ======
__//OBSOLETE//__
===== Before the lab =====

Software:
  * [[http://loki.ia.agh.edu.pl/smw|Semantic MediaWiki]]
  * [[http://loki.ia.agh.edu.pl/lokidev|Loki]]
//NOTE: Log in with a username and appropriate password given by a teacher.//

===== Introduction =====

Slides:
  * [[http://cslab.ia.agh.edu.pl/_media/explicite:explicite20100408:mng-kkr-gjn-explicite-semantic-wikis.pdf?id=explicite%3Aexplicite20100408%3Astart&cache=cache|Lightweight Reasoning in Semantic Wikis]]
  * [[http://www.slideshare.net/mtgreaves/tutorial-semantic-wikis-and-applications|Tutorial: "Semantic wikis and applications"]]

===== Lab instructions =====

==== - Semantic Wikis - Introduction ====
  * Browse the [[http://www.slideshare.net/mtgreaves/tutorial-semantic-wikis-and-applications|slides]] up to the ''**BREAK**'' slide (no.106).
  * Read the [[http://semantic-mediawiki.org/wiki/Help:Introduction_to_Semantic_MediaWiki|Introduction]] to the Semantic MediaWiki
==== - Semantic MediaWiki - Categories ====
  - Log in with your username and password given by the teacher to the [[http://loki.ia.agh.edu.pl/smw|SMW test installation]].
  - Create a page <code>http://loki.ia.agh.edu.pl/smw/index.php/jsi2012/<your-name></code> e.g. <code>http://loki.ia.agh.edu.pl/smw/index.php/jsi2012/wtadrian</code>
    - Enter the link to the navigation bar
    - If the page doesn't exist (and it shouldn't exist yet ;-) ) click ''edit this page'' \\ {{:pl:dydaktyka:semantic_web:smw-create.png?w300|}} \\ and shortly describe yourself, e.g. <code>
My name is Example student. I am 12 years old.
Currently I study at AGH UST, faculty of electrical engineering.
I belong to group <put your lab group number here>. The other members of my group are:
</code>
  - Based on the [[http://semantic-mediawiki.org/wiki/Help:Editing|SMW tutorial]], add the page to the **Student** category.
  - 8-) Paste the wiki page source (markup) in the report.
  - Create a new page as: <code>http://loki.ia.agh.edu.pl/smw/index.php/AGH-UST/Subjects/subject-name</code> and assign it to the category ''University subject''.
  - 8-) Paste the wiki page source (markup) in the report.

==== - Semantic MediaWiki - Properties ====
  - Based on the [[http://semantic-mediawiki.org/wiki/Help:Properties_and_types|Properties and Types]] section annotate the content of your //Student// page so that it contains the following semantic information about you:
      * Name (first + last name)
      * Age
      * Group (choose one)
  * 8-) include the updated wikipage source code (markup) in the report.
  - Edit the created page that belong to the //University subject// category so that it contains the following properties:
      * lead by
      * room
      * duration
  * 8-) include the updated wikipage source code (markup) in the report.
e.g.
<code>
lead by: [[lead by::prof Ligeza]]
room: [[room::B1 121]]
duration: [[duration::90]] min
</code>

==== - Semantic MediaWiki - Inline queries ====
  - Read the manual section on [[http://semantic-mediawiki.org/wiki/Help:Inline_queries|Inline queries]]
  - Using the **inline queries** add to your page the list of the students that are members of your group
    - Format the output of the query as unordered list
    - 8-) Put the query in the report.
  - Build another query listing the students from your group:
    - Display it as a table
    - Sort by age, then by the name
    - Define a default value which will be displayed if the required field (e.g. age) is empty.
    - 8-) Put the query in the report.



==== - Loki - Introduction ====
  - Go to the [[http://loki.ia.agh.edu.pl/|Loki website]].
  - Read the [[http://loki.ia.agh.edu.pl/about.php|About]] page to get to know the system better.
  - With your username and password log in to [[http://loki.ia.agh.edu.pl/lokidev|Loki installation]].
  - Read about the Loki possibilities in [[http://loki.ia.agh.edu.pl/lokidev/start#documentation|Documentation]] section (especially ''pluginapi[1/2]'').

==== - Loki - Use Cases ====
Choose and do one of the following two tasks: (they are also described in [[http://loki.ia.agh.edu.pl/lokidev/piw:start|Loki]])

=== - Movie recommendation system ===
  - Create a page of a movie in the ''movie:'' namespace. Assign it to the ''movie'' category.
  - Describe the movie **in english** using semantic annotations, according to an example ''filmy:poszukiwacze_zaginionej_arki'' in polish and an example ''bookstore:book:the_call_of_cthulhu'' in english (use the movie relations and the ''genre'' attribute (and possibly more if you want)).
  - Describe shortly one of the actors in the ''person:'' namespace and assign it to the ''actor'' category.
  - 8-) Copy the wiki pages sources and paste them into the report.

=== - Geographic Wiki ===
  - Create a page of a city in the ''city:'' namespace. Assign it to the ''city'' category.
  - Describe the city **in english** using semantic annotations, according to the example: ''miasta:warszawa''. You can add more semantic relations and attributes than in the examples.
  - Describe shortly the country of this city, assign it to the ''country'' category.
  - 8-) Copy the wiki pages sources and paste them into the report.

==== - Loki - Semantic Web Standards ====
  - Create a page for yourself in the ''user'' namespace, assign it to the ''user'' category.
  - Read the [[http://loki.ia.agh.edu.pl/lokidev/documentation:pluginapi2#sparql_queries|Plugin API v.2.0]], section on SPARQL.
  - On your page, build an example SPARQL query which asks for specific kind of movies or cities (you decide what criteria to use in the query!).
  - Observe the results. 8-) Put the query into the report.
  - Read the [[http://loki.ia.agh.edu.pl/lokidev/documentation:pluginapi2#rdf_export|Plugin API v.2.0]], section on RDF export.
  - Export the page you created about a movie or a city. Analyze the exported file. Find the category, relations and attributes that you entered - how are they represented?

==== - Loki - Reasoning ====
In Loki it is possible to embed Prolog code within ''<pl>...</pl>'' tags. Using Prolog code create a set of custom recommendations, e.g.: "Movies, where the leading lady is X and the movie was made before 1940" or "City which is located in a country which is by a sea and is not listed as a member of the EU".
  - Read the [[http://loki.ia.agh.edu.pl/lokidev/documentation:pluginapi1|Plugin API v.1.0]], section on Prolog.
  - On your **user** page create a section ''My Recommendations''
  - Create a Prolog goal so that the movies interesting for you are found. Optionally, you can define the interesting movies/cities with a Prolog rule and use it directly in the goal.
  - If you encounter problems, use the [[http://loki.ia.agh.edu.pl/lokidev/documentation:pluginapi2#debug_functions|debug functionality]] of Loki.

8-) Put the goal in the report. :!: NOTE: This can give you an extra point. If you don't do this exercise, you don't loose a point. Just a present for the end... ;-)

**NOTE: ** [[http://loki.ia.agh.edu.pl/lokidev/documentation:pluginapi1|Plugin API v.1.0]] and this [[http://cslab.ia.agh.edu.pl/_media/explicite:explicite20100408:mng-kkr-gjn-explicite-semantic-wikis.pdf?id=explicite%3Aexplicite20100408%3Astart&cache=cache|presentation]] may be useful.


===== Control questions =====
  * What is the difference between classical wikis a semantic ones?
  * What are the semantic annotations?
  * Does the Semantic Media Wiki support category hierarchy?
  * How to create a subcategory?
  * How to create a subproperty?

===== If you want to know more =====
Reading:
  * http://www.readwriteweb.com/archives/top_10_semantic_web_products_of_2010.php
  * http://www.we-love-the.net/FreeInfluencer/
  * http://simile.mit.edu/wiki/Piggy_Bank
  * http://www.opencalais.com/gallery