Ambient Intelligence for the networked home environment

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)

– 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

VantagePoint provides two distinct views

5

Introduction to VantagePoint (3/3)

• 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

• VantagePoint provides various

interaction possibilities: • Adding, removing and moving of

instances

• Printing of models

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

Tutorial1 VantagePoint

events

<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

VantagePoint.owl

Small.owl

<imports>

Tutorial1 VantagePoint

events

12

Step 2: Loading a semantic model

VantagePoint.owl

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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

VantagePoint.owlSimplifiedAmigo.owl

<imports>

Small.owl

<imports>

Tutorial1 VantagePoint

events

16

Step 3: Importing a model with additional class definitions and

adding a new area

Amigo_simplified.owl

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Step 3: Importing a model with additional class definitions and

adding a new area

Room

isa

imported ’Amigo_simplified.owl’

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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”