ISWIVE: an Integrated Semantic Web Interactive Visualization Environment

YZUCSE SYSLAB

ISWIVE: an Integrated Semantic Web Interactive Visualization Environment

Ing-Xiang Chen, Chun-Lin Fan, Pang-Hsiang Lo, Li-Chia Kuo, and Cheng-Zen Yang

Dept. of Computer Science and Engineering

Yuan-Ze University2005/3/29

YZUCSE SYSLAB ISWIVE: an Integrated Semantic Web Interactive Visualization Environment 2

Outline

• Introduction

• Related Work

• The Visualization Interface Design

• The Visual Interface Prototype

• Conclusions


Semantic Web

• Machine-understandable ability

• Two standards are under investigations:– RDF (Resource Description Framework) – Topic Maps

• Each of them describes the Semantic Web in a different view.


Semantic Web Visualization

• How to Present the full view of the Semantic Web becomes an important research issue.

• Visualization techniques play an important role to reveal the concepts of data frameworks.

• Visualization techniques have been increasingly applied to the Semantic Web.

• Past efforts visualize the Semantic Web on diverse frameworks.

• The panorama of the Semantic Web cannot be well displayed.


RDF Visualizations

• RDFSViz • RDFViz


Topic Maps Visualizations

• Topic Navigator • Tree Map


Summary

• Various map metaphors have been proposed to be available for the Semantic Web.

• IsaViz and RDFViz do not consider the presentation of topic information.

• The integration of their features can benefit the visualization of the Semantic Web and help users interact with the visual interfaces.


Our Research

• ISWIVE (integrated Semantic Web interactive visualization environment)– ISWIVE visualizes the concept of Topic Maps

in the RDF framework. – ISWIVE enhances the interface interoperability

by providing a local magnifier panel and an interactive semantic query procedure.


The ISWIVE Design

• ISWIVE uses a dual mode visualization.

• ISWIVE visualizes the content of the Semantic Web in detail and outlines all the topics and the relationships in a high-level view.

• The Semantic Web panorama can be visualized in a complemented way.


The Dual Visualization Layout

Local viewer

Semantic query

Semantic Web map


The RDF Visualization Algorithm

• The multi-scale force-directed algorithm:


The Hv-tree-drawing Algorithm

• The original hv-tree-drawing algorithm is used to draw a binary tree.

• The extended hv-tree-drawing algorithm:


System Architecture

Jena Semantic Web Toolkit(JSWT)

RDF ParserGraphical User Interface

(GUI)

Visualization Engine (VE)

ISWIVE Interface

RDQL ToolRDF

Documents

Information Analyzer (IA)

Query ResultAnalyzer

RDF MapsVisualizar

Resource Analyzer

Query

VisualResults

Topic TreeVisualizar

LocalViewer

Query

Graph Processing Document and Query Processing


The Prototype Environment

• ISWIVE uses the RDQL query tool and parser provided by the Jena Semantic Web Toolkit.

• We have applied RDF Topic Maps (RTM) namespaces for mapping the XML Topic Maps (XTM) to the RDF model.

• The System is developed with Java JDK 1.4.1.


The ISWIVE Interface

Local viewer

Semantic query

Semantic Web map


Visualization of the Topic Tree

The detailed view aroundthe clicked topic

The clicked topic


Visualization of the Query Results

The detailed view aroundthe clicked node

The query results

The query description


Conclusions

• ISWIVE visualizes the concept of Topic Maps in the RDF framework and presents a complete view of the Semantic Web.

• ISWIVE enhances the interoperability and query visualization interface.

• A simple, clear metaphor and an inferential query visualization still need further studying.