控制词汇是适用于存储库中所有信息的分类标签层次结构。
A controlled vocabulary is a hierarchy of categorization labels that are applied to all the information in the repository.
通常情况下，分类法专家会研究现有的数据库、Web站点、组织图表、产品线、其他遗留数据库、词汇列表和产品文档，从而了解现有的分类。
Typically, taxonomists look at existing databases, Web sites, organizational charts, product lines, other legacy databases, term lists, and product documentation to tease out existing categories.
Enterprise Vocabulary Net（EVN） TopQuadrant：查看基于 web 的解决方案，该解决方案用于简化对互相关联的受控词汇表、分类法、同义词表库、以及本体的开发与管理。
Enterprise Vocabulary Net (EVN) by TopQuadrant: Explore a web-based solution for simplified development and management of interconnected controlled vocabularies, taxonomies, thesauri, and ontologies.
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