<http://caligraph.org/ontology/Computer_book>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Technical_book> .
<http://caligraph.org/ontology/Technical_book>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Horbook_or_manual> .
<http://caligraph.org/ontology/Technical_book>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Technical_book>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Technical_books> .
<http://caligraph.org/ontology/Book_about_renewable_energy>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Technical_book> .
<http://caligraph.org/ontology/Environmental_book>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Technical_book> .
<http://caligraph.org/ontology/Technical_book>	<http://www.w3.org/2000/01/rdf-schema#label>	"Technical book" .
<http://caligraph.org/ontology/Book_about_the_energy_industry>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Technical_book> .
<http://caligraph.org/ontology/Technical_book>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Lists_of_technical_books> .