_:b17815	<http://www.w3.org/2002/07/owl#unionOf>	_:b16332 .
_:b16332	<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>	<http://w3id.org/glosis/model/layerhorizon/GL_Layer> .
_:b16332	<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>	_:b17381 .
_:b17381	<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>	<http://w3id.org/glosis/model/layerhorizon/GL_Horizon> .
_:b17381	<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .