Controlled Vocabulary
A controlled vocabulary is an authorized, predefined set of standardized terms used to consistently describe, index, and retrieve records, ensuring everyone applies the same words for the same concepts.
Controlled vocabulary is a curated list of approved terms—and rules for using them—that governs how records are labeled, indexed, and searched. Instead of letting each person freely type whatever word comes to mind, a controlled vocabulary fixes the preferred term, maps synonyms to it, and defines relationships between terms. This consistency is the backbone of reliable recordkeeping: it makes retrieval predictable, supports defensible disposition, and keeps classification stable as staff and systems change over time.
In practice, a controlled vocabulary underpins metadata fields, taxonomies, and file plans. For example, a vocabulary might designate “personnel” as the preferred term and redirect “HR records,” “employee files,” and “staffing” to it, so a search returns everything regardless of the original phrasing. This differs from free-text keywords, which scatter the same concept across countless variants. Modern electronic records guidance—reflected as agencies move from the revoked DoD 5015.2 endorsement toward the Universal ERM Requirements—treats consistent, machine-readable metadata as essential, and controlled vocabularies are how organizations achieve it.