Taxonomies have been fundamental to organizing knowledge and information for centuries. Now they are the backbone of well organized information systems and the lynchpin of findability in an online world. This book is the first taxonomy primer to present how to design, create, apply and maintain structured vocabularies, including taxonomy, thesauri, ontology and folksonomy, specifically for digital information. This comprehensive and accessible guide explains how to make sure both content creators and content consumers are speaking the same language. (Second Edition)