CO7216 Semantic Web
Coursework 3
Programming in Jena and OWL API
Important Dates:
Handed out: 17-March-2020
Deadline: 30-April-2020 at 17:00 BST
This coursework counts as 20% of your final mark.
This coursework is an individual assignment, not based on group work.
Please read guidelines on plagiarism on
https://www2.le.ac.uk/offices/sas2/assessments/plagiarism/penalties
This coursework requires knowledge of RDFS, SPARQL, Java, Apache Jena and OWL
API.
Please submit a signed cover sheet electronically to Blackboard.
Instructions:
You need to use the same domain as in CW1/CW2.
Make sure that you understand “what is expected” in this assignment, well before the
deadline.
Setup Instructions:
o Task 2: create a Java Project, download and import OntologyDataImporter.java
from Blackboard. Use Maven (or Gradle) to download all necessary dependency
libraries.
Note: Please refer to the tutorial on Blackboard (“Programming the Semantic
Web”) for more detail.
Tasks:
The aims of this coursework is to develop a data importer that access various triplestores via
SPARQL endpoints, and use the data collected to populate an OWL ontology that you created in
CW2.
Part 1
Create a “lightweight” version of an OWL2 ontology in your chosen domain – This could be
derived from the ontology you created for CW2, or you may create a new one from scratch. Please
make sure that you have addressed any issues in the feedback to CW1/2. This ontology must
contain at least ten core classes and twenty core DataType and Object properties. Use
HermiT/FaCT++ reasoner to make sure the ontology is consistent.
[25 Marks]
Part 2
Use Protégé OWL code generator to generate Java templates from the ontology created in Task 1
(Please refer to “Programming the Semantic Web” on Blackboard). Complete the missing methods
in OntologyaImportor.java, and use generated classes to populate the ontology.
Your program should be able to:
Search online triplestores via SPARQL endpoints, including, but not limited to some of the
endpoints listed below:
DBpedia https://dbpedia.org/sparql
Office for National Statistics http://statistics.data.gov.uk/sparql
Companies House http://business.data.gov.uk/companies/app/explore/sparql.html
W3C SPARQL endpoints https://www.w3.org/wiki/SparqlEndpoints
WU endpoints http://sparqles.ai.wu.ac.at/availability
(Note: add new classes to your ontology if necessary)
Use the data obtained from the previous step to populate your ontology (e.g. creating
instances, assigning property values and establishing relationships).
[40 Marks]
Part 3
Write a short description (approximately 200 words) about your domain in an HTML page
(about_us.html), and then annotate the content of this webpage in RDFa, using the ontology
created in Task 1, together with other vocabularies, including (but not limited to):
FOAF: http://xmlns.com/foaf/spec/
Dublin Core: http://www.dublincore.org/specifications/dublin-core/dcmi-terms/
Hint: You may use this RDFa tool for editing http://rdfa.info/play/
[15 Marks]
Part 4
Develop a simple web application that allows users to query your OWL file. The web interface:
Should use ontology-based repository as the backend (e.g. OWL files or RDF stores, not
SQL or JSON database)
Should provide an interface that allows users to answer at least two competency questions
provided in CW1.
Note: Task 4 may be implemented in any programming languages (e.g., ASP.NET, Python, PHP
etc.). Although it might be necessary to expose some functions as REST services, if OWL API is
not available in the language you chose. [see Appendix 1]
[20 Marks]
Submission
Question 1: Save the ontology as *.owl.
Question 2: OntologyDataImporter.java and any other files, including all autogenerated java classes.
Question 3: Write the answer in Answers.pdf.
Question 4: Submit the entire web application project, you might include a note describing
how to run your application.
Compress all files in a single zip. The zip file should be named CO7216_CW3_your_email_id.zip
(e.g. CO7216_CW3_abc123.zip). Your submission should also include a completed coursework
plagiarism coversheet (print and signed PDF or image). You need to submit the zip file via
Blackboard and you are allowed to re-submit as many times as you like before the deadline. Marks
for any coursework which does not have the accompanying cover sheet will be withheld till you
provide one.
Anonymous marking
We operate an anonymous marking scheme. Your email id will be hashed before grading. All
submitted OWL files and the Java programs will be marked anonymously.
Marking Scheme