As taxonomists (and ontologists and semantic modelers, etc.) we want to, and often do, build robust, standards-compliant semantic structures with lots of attributes, identifiers, labels, and other information – to say nothing of advanced semantic relationships.
Enterprise information environments in large organizations with lots of content (that is: all large organizations) tend to have a variety of content and asset management systems. In well-developed information environments, these systems consume taxonomies from a central taxonomy management system that acts as the Single Source of Truth (SSoT) for taxonomy and metadata tags. In these situations, specific consuming systems (CMS, DAM, CRM, and other three-letter acronym systems, among others) take all or part of the taxonomies from the central repository (usually, and hopefully, a dedicated and enterprise-class taxonomy management tool) and use them to populate tagging systems, picklists, and other interfaces in which metadata is applied.