CEDEX an extensible ontologie for the transfer of
, Mirtl Michael
, Umweltbundesamt GmbH
The Austrian environment agency has created the object
MORIS to manage all the data g
enerated by the Austrian part of the UN ECE program
“Integrated Monitoring”. The concept of this information system with its core and
rules for extension proofed to fit for (nearly) any ecological topic.
Now as the agency would strongly need an universal
interface for the exchange of
ecological data, we supposed the concept would also be appropriate for that task. We
choose an object orientated formal XML based language, OWL, on which we mapped
the basic structure and the examples for extensions. We calle
d the result CEDEX
Concept of CEDEX
We fixed right from the beginning:
The definition has to be object orientated which could easily be done, since
MORIS already is objectorientated.
The base ontology shall b
e easily extended, where the extensions must be as
independent from each other as possible.
The structure must take into account, that Paramters, Methodes and so on may
be related rather in the same way as taxons are.
There is a very simple bas
All extension classes are derived from those base classes.
new classes may be built.
All existing relations are defined in the base classes
.The relations of the
extension classes may just restrict the allowed classes.
BASE is a rearrangement of the well known "
coverage, temporal coverage, taxonomic coverage"
(© EML et al.):
OBJEKT and derived classes register all the things, on which
observations are done. (And also all auxiliary structures)
METER and derived classes contain all the things that are
METHODE and derived classes are the methods of observation.
The association class DATENPUNKT notifies where which
parameters are observed.
PROZESS and derived classes are for natural proce
meteorological and geomorphological events) and human made
processes (testings, ….)
fig 1 shows the basic classes (white) and the first generation of derived classes without attributes. It
goes without saying that a tree of inherited class
es is allowed.
Some auxiliary classes (like scaling, dimension, …..) and some attachment classes are
defined. The attachment classes may be extended in the same way as the basic classes.
We added some examples for extensions.
Fig. 2 shows CEDEX BASE a
nd some extensions.
As one can already see in fig. 1 a relation between the objects derived from one basic
object is defined. Taxonomists may well know this relationship, which allows the
mapping of a polyhierarchy. We know that taxonomists are very asto
they are told that not only species but also parameters like “heavy metal” are not
always the same, depending on methods of gathering, preparing the specimen,
accurancy and so on of measurement.
CEDEX allows the definition of very simple funct
ions that can be applied according
to the relation “polyhierarchy”. This is shown in the UML schema.
UML definition of CEDEX
Protégé 2.0 definition of CE
OWL definition of CEDEX www.umweltbundesamt.at/CEDEX_OWL
METEOROLOGICAL EXTREME EVENTS
NEW NEW NEW
MOSSES AND AIR POLUTION
OWL Web Ontology Language:
Science Environment for Ecological Knowledge (SEEK):
Ecological Metadata Language (EML):