Phrase searching (using quote marks to keep keywords grouped together) like "sustainable development" does not work in the search. Truncation searching at the end of a term is enabled in the search, with or without using an asterisk (*). Search results are sorted by relevance as default, but can also be sorted alphabetically. 
Search for terms using the search box in the native language of the interface, with a drop-down menu providing suggested terms. Terms are organized in a hierarchy, with related, broader and narrower terms indicated for each term. Users can browse terms by concept or alphabetically. There may be issues with using metadata.un.org on the Internet Explorer browser, Chrome and Firefox browsers are recommended to access the site instead. Search tips, recent updates and more information on the UNBIS Thesaurus can be found in our guide. If you would like to contribute to the UNBIS Thesaurus, please send us your suggestions. The UNBIS Thesaurus is available online in the six official UN languages, and for download in ttl, rdf/xml, csv or xlsx formats. In addition, other UN programmes, funds and regional commissions use the UNBIS Thesaurus for description of bibliographic materials and web content. 
UNBIS Thesaurus concepts are used in the UN Digital Library and the Official Document System (ODS). Controlled vocabulary makes subject searches possible by identifying documents on the same concept, even as terminology changes.
The UNBIS Thesaurus grows as new topics are introduced to the agenda of the Organization and evolves as the language in the UN documents shifts over time. The UNBIS Thesaurus is a multilingual database of the controlled vocabulary used to describe UN documents and other materials in the Library's collection.
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