The ICPSR Thesaurus is a controlled vocabulary system composed of three separate lists: Subject Thesaurus, Personal Names Authority List, and Geographic Names Thesaurus.
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Will be translated into more languages. "The complete thesaurus, or any substantial part of the thesaurus, may not be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise without the permission of the copyright holder."
The thesaurus was initially based on the UNESCO Thesaurus (ISBN: 92-3-101469-2) and is continuously expanded and updated by the UK Data Archive. HASSET may be used by other organisations, for example to index materials, provided it is for non-commercial purposes and appropriate acknowledgement is given. A licence form allowing you to use or adapt HASSET in your own organisation can be requested from firstname.lastname@example.org.