Geoscience Reference
In-Depth Information
Example: River (
Sava
) cannot be smaller than River (
Sava
) and relation-
ship is irreflexive.
Figure 8:
An example of the Irreflexive relationship
.
Between ontology domain elements could be developed big number of
relationships. But, there should be made balance between complexity of
domain and functionality. Because too complicated ontology could lead to
complex database querying. Unfortunately, standardisation on this point is
still not adecquatly developed. New ISO new work item proposal on
ontology should standardize relationships.
6- UNGEGN World geographical names database
UNGEGN World Geographical Names Database contains basic geo-
graphic names for each UN member country. It is multilingual, multiscrip-
tual georeferenced geographical names database. It contains the names of
the countries in the short and formal form, main and major cities (popula-
tion over 100,000) in the national language and six official UN languages.
It also contains language and sound files with pronunciation of major cit-
ies. The user interface has been published on the Internet address
http://unstats.un.org/unsd/geoinfo
.
