Logical Difference Vizualiser (LogDiffViz)

Logical Difference Vizualiser (LogDiffViz)

by William Gatens

Type	Tab, View
Author(s)	William Gatens
Last Update	September 12, 2011
License	not available
Homepage	not available
For Application	Protege-OWL
Topic(s)
Affiliation	University of Liverpool

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Logical Difference Visualizer (LogDiffViz) is a plugin for Protege-OWL

Versions & Compatibility

This section lists available versions of Logical Difference Vizualiser (LogDiffViz).

Version	Compatible with	Dependencies
Logical Difference Vizualiser (LogDiffViz) 0.1.0	Protege-OWL 4.1	Linux Operating System

If you click on the button below to add a new version of Logical Difference Vizualiser (LogDiffViz), you will be asked to define a page title for the new version. Please adhere to the naming convention of Logical Difference Vizualiser (LogDiffViz) X.X.X when you define the new page!

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Changelog

Version	Changes in this version
Logical Difference Vizualiser (LogDiffViz) 0.1.0	see page for more details

Overview

The LogDiffViz Plugin allows users to perform a logical difference computation between two ontologies, and allows users to view the results within the Protege-OWL editor. A logical difference computation aims to calculate the difference between two ontologies taking into account the semantic meaning of the underlying description logics on which ontology languages are built, rather than syntactical or structural differences. The theoretical background for this approach is described in a paper The Logical Difference Problem for Description Logic Terminologies by Boris Konev, Dirk Walther and Frank Wolter

Internally the LogDiffViz plugin uses a tool called CEX2 which does the core computation in the logical difference visualisation process (the plugin is simply a front-end to the CEX tool). More information about the CEX tool can be found at [1]

How to use it

Visualizing a logical difference computation

The basic steps of visualising a logical difference computation between to ontologies:

1. Enable the LogDiffViz tab: Window > Tabs > Logical Difference Visualizer
2. Open the Control Panel from the menu: Tools > Difference... Visualization
   1. Select and load an ontology into the first box
   2. Select and load an ontology into the second box
   3. Choose a signature option (see below)
   4. Press "Visualize"

You should now get a display of the logical difference visualization. The two ontologies you selected will be loaded into the top half of the tab and the logical difference will be loaded into the bottom half. Each ontology (and differences) takes on a tree like structure so you can navigate the axioms of the ontology by expanding and collapsing the tree.

Signature Options

A signature is the union of concept and role names for a given ontology and can be used generate a logical difference computation based on a particular set of concept and role names, rather than simply generating an arbitrary set of differences.

Using the control panel you can choose which signature will be used either:

• The signature of the first ontology
• The signtaure of the second ontology
• A "shared" signature - The intersection of the signature of the first and second ontologies
• A custom signature - which can be any subset of the complete signature - generated by the signature tool found in the "Tools" menu

Toolbar Options

Axiom Pinpointing (Explanations)

Signature Overview

Screenshots

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Limitations and known issues

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