When constructing a controlled vocabulary it is important not to duplicate an existing controlled vocabulary. This requires analysis of existing controlled vocabularies in the domain and domains that are proximal. 

Controlled Vocabulary Information Domains

- Literary Warrant
- User Warrant
- Organizational Warrant

Types of Warrant

- Information Domain
- Warrant
- Specificity and Granularity
- Relationship with Other Controlled Vocabularies

San Jose State University

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. 

Term Selection in 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 

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