Ellyn Montgomery

Vocabularies: Dictionaries, Ontologies, and More

Every discipline has its own terminology. Consider terms that are used to describe vertical distances. The word “altitude” refers to the distance of something above a reference point like ground level, such as an airplane in flight. If we were examining a set of blueprints for a building we would not use the word “altitude” to describe the level of the rooftop, even though it is also a vertical distance above ground level.

Classification of Controlled Vocabularies

In understanding English, if we want to figure out what a word means, we might consult a dictionary or a glossary. Or we may use an etymology dictionary to track the history of a word. If we want to know how a term relates to other terms we might consult a thesaurus.

Like the vocabulary sources for the English language, controlled vocabularies for describing metadata can be classified by their purpose, their form, or their functionalities.

Classification by Purpose

Vocabularies may be defined by their ability to accomplish specific goals:

Introduction to Metadata Interoperability

Metadata interoperability is the ability of two or more information systems to exchange metadata with minimal loss of information. This does not address data compatibility—only interoperability of descriptive metadata.

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