Metadata is used to organize and access information in an effective way. This is a comprehensive description of the various forms of metadata, its applications, and how librarians can use it. Both descriptive and nondescriptive forms of metadata are defined and applied to library functions.

A revitalized version of the popular classic, the Encyclopedia of Library and Information Science, Second Edition targets new and dynamic movements in the distribution, acquisition, and development of print and online media-compiling articles from more than 450 information specialists on topics including program planning in the digital era, recruitment, information management, advances in digital technology and encoding, intellectual property, and hardware, software, database selection and design, competitive intelligence, electronic records preservation, decision support systems, ethical issues in information, online library instruction, telecommuting, and digital library projects.