VantagePoint

1. VantagePoint Tutorial June 5-6 2007 Darmstadt

2. Outline • Introduction to VantagePoint • Some Use Cases for VantagePoint • Tutorial with an example scenario

3. Introduction to VantagePoint (1/3) • VantagePoint is an ontology viewer that uses Jena interface to manage ontologies and Java 2D graphics to visualize them • VantagePoint encapsulates OWL ontologies into semantic models and provides tools to retrieve these models from a disk, manage them dynamically and store them back on the disk. • All visible things in VantagePoint visualization fall into two classes: Area and Item. What these classes represent is up to the developer • With VantagePoint application developers can see different operations as in real life and notice practical errors better without expensive test laboratories

4. Introduction to VantagePoint (2/3) VantagePoint provides two distinct views • The isometric view provides a good overall picture of the visualized environment • The edit view is a 2D ‘ground plan’ view and it enables accurate editing operations

5. Introduction to VantagePoint (3/3) • VantagePoint provides various interaction possibilities: • Adding, removing and moving of instances • Printing of models • VantagePoint provides two different query methods • With the graphical querying users are able to execute queries with minimal knowledge about the query languages needed. • With the free query users are able to textually define their own query statements without any constraints. • VantagePoint supports two ontology query languages: RDQL and SPARQL

6. Some use cases for VantagePoint With VantagePoint users are able to • Create virtual environments • Simulate contextual changes • Gain better understanding of the semantic models • Simulate service discovery and composition • Perform queries about context and other information VantagePoint • Supports the development of new services • Allows to view ontology instances associated with a complex contextual information in a more illustrative and understandable way • Acts as an interface between ontological models and external applications

7. Tutorial with an example scenario The tutorial is divided into 6 steps, which are • Step 1: Launching VantagePoint from an external application • Step 2: Loading a semantic model • Step 3: Importing a model with additional class definitions and adding a new area • Step 4 & Step 5: Performing queries • Step 6: Adding a new property to an instance • These steps demonstrate • How VantagePoint can be used from external applications • How to import own class definitions and • How to add properties to different instances

8. Tutorial with an example scenario The tutorial is divided into 6 steps, which are • Step 1: Launching VantagePoint from an external application • Step 2: Loading a semantic model • Step 3: Importing a model with additional class definitions and adding a new area • Step 4 & Step 5: Performing queries • Step 6: Adding a new property to an instance

9. Step 1:Launching VantagePoint from an external application events VantagePoint Tutorial1 <launchVP>

10. Tutorial with an example scenario The tutorial is divided into 6 steps, which are • Step 1: Launching VantagePoint from an external application • Step 2: Loading a semantic model • Step 3: Importing a model with additional class definitions and adding a new area • Step 4 & Step 5: Performing queries • Step 6: Adding a new property to an instance

11. Step 2: Loading a semantic model events Tutorial1 VantagePoint Small.owl <imports> VantagePoint.owl

12. Step 2: Loading a semantic model VantagePoint.owl

13. Step 2: Loading a semantic model • Small.owl • VantagePoint forms a semantic model from this file and visualizes it • Contains the areas and items to be visualized • 3 areas • 3 items • 1 person

14. Tutorial with an example scenario The tutorial is divided into 6 steps, which are • Step 1: Launching VantagePoint from an external application • Step 2: Loading a semantic model • Step 3: Importing a model with additional class definitions and adding a new area • Step 4 & Step 5: Performing queries • Step 6: Adding a new property to an instance

15. Step 3: Importing a model with additional class definitions and adding a new area events Tutorial1 VantagePoint Small.owl <imports> <imports> SimplifiedAmigo.owl VantagePoint.owl

16. Step 3: Importing a model with additional class definitions and adding a new area Amigo_simplified.owl

17. Step 3: Importing a model with additional class definitions and adding a new area isa imported ’Amigo_simplified.owl’ Room

18. Step 3: Importing a model with additional class definitions and adding a new area • A new area is added. • This area is defined as an instance of the class Amigo_simplified:Room ”amigoRoom”

19. Tutorial with an example scenario The tutorial is divided into 6 steps, which are • Step 1: Launching VantagePoint from an external application • Step 2: Loading a semantic model • Step 3: Importing a model with additional class definitions and adding a new area • Step 4 & Step 5: Performing queries • Step 6: Adding a new property to an instance

20. Step 4 & Step 5: Performing queries Tutorial1 VantagePoint executeQuery(queryStatement) queryResults

21. Tutorial with an example scenario The tutorial is divided into 6 steps, which are • Step 1: Launching VantagePoint from an external application • Step 2: Loading a semantic model • Step 3: Importing a model with additional class definitions and adding a new area • Step 4 & Step 5: Performing queries • Step 6: Adding a new property to an instance

22. Step 6: Adding a new property to an instance • ”amigoID” property is added to the amigoRoom instance amigoID = ”1234”