@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix owl: <http://www.w3.org/2002/07/owl#>.
@prefix mon: <http://www.semwebtech.org/mondial/10/meta#>.
@prefix xsd:  <http://www.w3.org/2001/XMLSchema#>.
@prefix : <foo://bla/>.
_:Longitude a rdfs:Datatype; owl:onDatatype xsd:int;
   owl:withRestrictions (_:long1 _:long2).
_:long1 xsd:minInclusive -180 .
_:long2 xsd:maxInclusive 180 .
#_:Latitude a rdfs:Datatype; owl:onDatatype xsd:int;
#   owl:withRestrictions (_:lat1 _:lat2).
#_:lat1 xsd:minInclusive -90 .
#_:lat2 xsd:maxInclusive 90 .
# ********** with that it complains:*************************
_:EasternLongitude a rdfs:Datatype; owl:onDatatype _:Longitude;
  owl:withRestrictions (_:eastlong).
# ********** with that it works:*************************
# _:EasternLongitude a rdfs:Datatype; owl:onDatatype xsd:int;
#  owl:withRestrictions (_:eastlong).
_:eastlong xsd:minInclusive 0 .
:EasternHemispherePlace  owl:equivalentClass [a owl:Restriction;
  owl:onProperty mon:longitude; owl:someValuesFrom _:EasternLongitude].
mon:longitude rdfs:range _:Longitude.
#mon:latitude rdfs:range _:Latitude.
:Berlin a mon:City; :name "Berlin"; mon:longitude 13; mon:latitude 52 .
#:Atlantis a mon:City; :name "Atlantis"; mon:longitude -200; mon:latitude 100 .
:Lisbon a mon:City; :name "Lisbon"; mon:longitude -9; mon:latitude 38 .