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Introduction to the Semantic Web

Last verification: 20160924
Tools required for this lab:

Before the lab

Introduction

Lab instructions

1 Extracting RDF metadata [5 minutes]

Semantic Web-aware tools and technologies are around…

  1. Annotating flickr images:
    1. Enter URL for some image you like
    2. Select some regions on the picture and add descriptions for them
    3. Generate file using „Show JSON-LD” button
    4. Analyse the file. How regions' information is represented? Copy the source into the report 8-).

2 Common Vocabularies [10 minutes]

  1. Acquaint yourself with the following vocabularies: SKOS, Dublin Core, FOAF
  2. 8-) Answer the questions:
    1. What is each vocabulary for?
    2. What applications use them?
  3. Browse thruogh more semantic vocabularies here. Choose one vocabulary and describe it shortly in your report 8-).

3 FOAF [10 minutes]

  1. Create your FOAF file with: foaf-o-matic
  2. Save your FOAF file. Put it in the report 8-).
  3. Publish your file so that it can be referenced with URL. Put the URL into the report 8-)
  4. Visualize your FOAF file with FOAF.Vix. Simply put the URL as an uri argument to the FOAF.Vix, e.g.: http://foaf-visualizer.gnu.org.ua/?nocache=1&uri=http://home.agh.edu.pl/~kkutt/foaf.rdf
  5. Add more friends using their FOAF files. Visualize again.

4 Linked Open Data [20 minutes]

  1. Go the the webpage of the Linking Open Data project.
    • Analyze the clickable LOD diagram, choose 5 datasets and in a few words describe them in the report (what information do they contain?) 8-)

5 Semantic Web tools and applications [30 minutes]

Browse the following websites and get to know various Semantic Web tools and applications:

  1. 8-) ConverterToRdf: which in your opinion are the most important? What Converter would you add (converting from what format)?
  2. 8-) Linked Data Browsers: how many of them are up and running?
  3. 8-) Sweet Tools: select one Annotator (tool for semantically annotating resources; you can simply put „Annotator” in search box) and describe it's capabilities.
  4. 8-) Choose one application from Top 10 Semantic Web Products of 2009 or Top 10 Semantic Web Products of 2010, read more about it and describe why this one is considered as Semantic Web application.

Control questions

(Based on this lab and first lecture)

  • How one can add semantic annotation to a web page?
  • Explain the Semantic Web Stack of technologies.
  • What is the main syntax for RDF? What are its advantages over other syntaxes?
  • What is the role of the ontologies in the Semantic Web?
  • What are the 4 principles of Linked Data?

Report

  1. Answer the questions marked 8-) in this lab.
  2. (Optionally) Add extra feedback section in the report to earn extra credit.

If you want to know more

pl/dydaktyka/semweb/2016/labs/intro.1475499764.txt.gz · ostatnio zmienione: 2019/06/27 15:55 (edycja zewnętrzna)
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