Art & Architecture Thesaurus
Terms
Terms
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The initial core set of terms was derived from authority lists and the literature of art and architectural history; this core set was reviewed, approved and added to by an advisory team made up scholars from all relevant disciplines, including art and architectural historians, [architects](/wiki/Architect "Architect"), [librarians](/wiki/Librarian "Librarian"), visual resource [curators](/wiki/Curator "Curator"), [archivists](/wiki/Archivist "Archivist"), museum personnel, and specialists in [thesaurus](/wiki/Thesaurus "Thesaurus") construction. Its [hierarchy](/wiki/Hierarchy "Hierarchy") was inspired by the [Medical Subject Headings](/wiki/Medical_Subject_Headings "Medical Subject Headings"). All eras from antiquity to the present are covered, and it is not limited geographically.

As of January 2007, the AAT contained approximately 131,000 terms. While the thesaurus contains many variations on a term, such as [singular and plural forms](/wiki/Grammatical_number "Grammatical number"), spelling variants, various forms of speech, and [synonyms](/wiki/Synonym "Synonym"), one is always flagged as the preferred term. Terms are updated biweekly and regular users are encouraged to propose new terms.

In 2015 AAT contains 354,000 terms. They are available in 4 major languages (English, Dutch, Spanish and Chinese), and some terms in various native languages.


Are spelling variants included in the AAT terms?