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EPA Web Taxonomy

Published by U.S. EPA Office of Mission Support (OMS) | U.S. Environmental Protection Agency | Metadata Last Checked: August 01, 2025 | Last Modified: 2014-01-01
EPA's Web Taxonomy is a faceted hierarchical vocabulary used to tag web pages with terms from a controlled vocabulary. Tagging enables search and discovery of EPA's Web based information assests. EPA's Web Taxonomy is being provided in Simple Knowledge Organization System (SKOS) format. SKOS is a standard for sharing and linking knowledge organization systems that promises to make Federal terminology resources more interoperable.

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