This document provides instructions for installing and running Jena, a Java framework for building semantic web and linked data applications. It discusses RDF, the resource description framework, and describes how to download the necessary tools, create a Java project in Eclipse, add the Jena libraries to the project's build path, and import example source code to get started with the Jena API.

1. Play with Jena Semantic Web Framework on Java Umi Laili Yuhana Master Candidate of Computer Science and Information Engineering National Taiwan University December 2007 http://yuhanaresearch.wordpress.com

2. Goal Provide material for beginner who want deal with JENA API This work support lab material given in Advanced AI class on May 17, 2007 Complete lab material can be found in Jena Lecture by C.F.Liao ( 廖峻鋒 ) on Advanced AI class on May 17,2007 in CSIE Department, National Taiwan University http://yuhanaresearch.wordpress.com

3. Outline RDF (Resource Description Framework) JENA Installing and Running Jena http://yuhanaresearch.wordpress.com

4. RDF http://yuhanaresearch.wordpress.com

5. RDF Example Example : CD list RDF Document for CD list http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

6. RDF Stand for Resource Description Framework W3C standard for describing resources on the web Is designed to provide common way to describe information so it can be read and understood by computer application http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

7. RDF RDF descriptions are not designed to be displayed on the web Written in XML Example : Describing properties for shopping items , such as price and availability Describing information about web pages , such as content, author, created and modified date http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

8. RDF Model Model is a set of Statement RDF statement : combination of a resource , a property , and a property value Known as subject , predicate and object RDF use web identifier (URI) to identify resources http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

9. RDF Statement and RDF Model Triple: T (subject, attribute, values) Example : The artist of Empire Burlesque is Bob Dylan The artist of http://www.recshop.fake/cd/ Empire Burlesque is Bob Dylan  (identify with resource/URI) http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena Subject Object predicate

10. RDF Graph of Data Model Example http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

11. RDF Element Root element defines the XML document to be an RDF document. contains a reference to the RDF namespace Description element identifies a resource with the about attribute contains elements that describe the resource http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

12. RDF Element (cont.) Root element Description Element http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

13. RDF Element (cont.) Define XML document To be RDF Document RDF namespace About Attribut elements that describe the resource http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

14. RDFS (RDF Schema) Extension of RDF Describes resources with classes , properties , and values P rovides the framework to describe application-specific classes and properties http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

15. RDFS Example : the resource "horse" is a subclass of the class "animal" http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

16. RDF OWL Stand for RDF Web Ontology Language OWL : Language for processing Web Information Build on top of RDF stronger language with greater machine interpretability than RDF Written in XML http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

17. JENA Java API for semantic web applications http://yuhanaresearch.wordpress.com

18. Jena Java API for semantic web applications Can be used to create and manipulate RDF graphs Jena has : Resource interface  represent resources Property interface  represent properties Literal interface  represent literals Model interface  represent graph http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

19. Example code to create graph with jena // some definitions static String personURI = "http://somewhere/JohnSmith"; static String fullName = "John Smith"; // create an empty Model Model model = ModelFactory.createDefaultModel(); // create the resource Resource johnSmith = model.createResource(personURI); // add the property johnSmith.addProperty(VCARD.FN, fullName); http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

20. JENA RDF Package Key RDF package for the application developer is com.hp.jena.rdf.model Package contain interfaces for representing: Models Resources Properties Literals Statements All other key concept of RDF ModelFactory for creating models http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

21. Installing and Running Jena http://yuhanaresearch.wordpress.com

22. Installing and Running Jena Download JDK 5 Download and install Eclipse Download Jena Tuning your Eclipse Create a java project Append Jena libraries to your classpath Use Jena API to create some RDFs http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

23. Preparation the tools Download JDK 5 from http://java.sun.com/javase/downloads/index_jdk5.jsp Download and Install Eclipse from http://www.eclipse.org/downloads/ Download Jena from http://jena.sourceforge.net/downloads.html Download 2007-05-17-jenademo.rar from this site and extract it in your directory (optional) http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

24. Download Jena http://yuhanaresearch.wordpress.com http://jena.sourceforge.net/downloads.html RDF JENA Installing and Running Jena

25. Create New Java Project in Eclipse Open Eclipse Create New Project by select File Menu  New  Project In the next dialog, choose Java  Java Project and click Next http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

26. Define Project Name Write “JenaDemo” as a name, click Next button Click Finish in the next dialog http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

27. Create Source Folder Righ click on JenaDemo Project Select New  Source Folder given src as name and click Finish button http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

28. Append Jena libraries to classpath Righ click on the project, choose Properties Click “ Java Build Path ” section, choose “ library ” tab Click “ Add External Library ” button, and find jena/lib source and choose all library , and click open http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

29. Append Jena libraries to classpath Choose Order and Export Tab , check all the library by click “ Select All ” button Make sure all Jena Library are checked , and click OK button http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

30. Import Source Folder This step is optional if we want to import source folder from another folder To do it, follow these steps: Suppose we have source folder that is extracted from 2007-05-17-jenademo.rar Right click in src and choose “import” , choose General  File System and Click Next Then Choose “browse” on Import dialog Choose the folder where we put the source and click OK After done this part we can running jena API in Java for semantic web application http://yuhanaresearch.wordpress.com RDF JENA Installing and Running Jena

31. http://yuhanaresearch.wordpress.com Right click in src and choose “import” choose General  File System and click Next Then Choose “browse” on Import dialog Choose the folder where we put the source and click OK RDF JENA Installing and Running Jena

32. Thanks http://yuhanaresearch.wordpress.com