aSession.startOperation()
aFeature = aDoc.addFeature("Point")
aFeatureData = aFeature.data()
aSession.startOperation()
aFeature = aDoc.addFeature("Point")
aFeatureData = aFeature.data()
aFeatureData.real("x").setValue(0.)
aFeatureData.real("y").setValue(0.)
aFeatureData.real("z").setValue(0.)
aFeatureData.real("x").setValue(0.)
aFeatureData.real("y").setValue(0.)
aFeatureData.real("z").setValue(0.)