The operation of selecting preferred terms or headings which are used to describe the content and characteristics of an information object. 

San Jose State University

A list of subject headings that are used along with metadata to sort and organize resources in a library or archive. The collection of terms are used to describe documents and content objects.

Controlled Vocabularies 

ANSI/NISO. (2005). Guidelines for the Construction, Format, and Management of monolingual Controlled Vocabularies. American National Standards Institute. https://groups.niso.org/higherlogic/ws/public/download/12591/z39-19-2005r2010.pdf 

Guidelines for the Construction, Format, and Management of monolingual Controlled Vocabularies

- Lists
- Synonym Rings
- Taxonomies
- Thesauri

Types of Controlled Vocabularies

Indexing

The selection of terms for a controlled vocabulary is important for usability. Selection cannot be arbitrary and there are several considerations that need to be taken into account. 

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