Enterprises invest in big-ticket information management software such as search, portal, and enterprise content management (ECM) systems, in an effort to eliminate information silos and increase content reuse. To reach such an ambitious goal, it's vital to enrich the content that flows through these systems with more meaningful and structured metadata. Enriched content is simply easier to isolate, promote, find, and control. But it's challenging to incorporate taxonomy projects in the whirlwind of tools and processes to create, manage, and access content in the enterprise. Here's a guide to building taxonomies that don't sit on a shelf; they work inside key information systems to make them hum.