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WP5 - Ontology integration and merging

Workpackage number
5
Start date or starting event
08/2006 End date 08/2007
Activity type
RTD/Innovation activities
Participant id
FUB UOR MAN. TUD TUHH
Person months
4
4 12
4 3
Description of work
TASK 1: Formalization of tasks for ontology integration and merging
In this workpackage we concentrate on all those tasks introduced in WP1 that deal with a system of
multiple ontologies exchanging knowledge and services. The tasks will rely on services for exporting
the knowledge in an ontology to be shared. The services will be based on a declarative representation
of interface information, similar to standard mechanisms in software engineering such as public and
private classes. They will allow for establishing in an automatic or semi-automatic way correspondences
(mappings) between the knowledge in different ontologies while preserving the independence of the
ontologies. Such correlation can either be exploited for exchanging data during ontology interoperation
(cf. WP6), or as a preliminary step in methods for merging multiple ontologies into a single reconciled
and integrated one.
TASK 2: Development of techniques for ontology integration and merging
This task will combine the use of reasoning services developed in WP3 with the declarative interface
information and (possibly extra-logical) methods for synthesis of mappings and merging of ontologies.
We will develop techniques for the semi-automated reformulation of concepts: given a class in one
ontology, how can it “best” be expressed in terms of another ontology. We will develop algorithms
that suggest such candidate reformulations, from which the user then can choose an appropriate one.
Making use of reformulation, we will further devise methods to suggest how to reconcile and integrate
the knowledge in different ontologies.
TASK 3: Implementation of the techniques for ontology integration and merging
The obtained algorithms for the relevant reasoning services will be implemented in prototype software
tools. Making use of the reasoning services developed in WP3 and the ad-hoc techniques developed in
Task 2, the tools will synthesize in a (semi-)automatic way mappings between ontologies, and support
the designer in merging multiple ontologies into one.
Deliverables
D11 (10/2007) – Tasks for ontology integration and merging (Report)
The report will discuss in detail the reasoning services needed for ontology integration and merging
tasks. It will also describe how these reasoning services will be used in methods and services supporting
such activities.
D19 (06/2008) – Techniques and methods for ontology integration and merging (Report)
The report will summarize the techniques that realize the reasoning services identified as fundamental
for ontology integration and merging, and will report on their computational properties.
D22 (06/2008) – Software tools for ontology integration and merging (Prototype)
Prototype software tools that implement the reasoning services supporting the tasks for ontology integration
and merging will be delivered.
Milestones and expected results
The expected results of this workpackage are a set of techniques, methods, and tools for realizing integration and merging of multiple ontologies.

2005-2007 TONES - Thinking Ontologies
1