Even experienced catalogers and copy catalogers who know their way around the tags and strings of a MARC record need guidance when creating metadata for sharing bibliographic records or digital collections on the web. Likewise, coders or new librarians coming from iSchool or software backgrounds need examples of how to use XLML or XSLT scripting with library records. That's where this new handbook from the Association for Library Collections & Technical Services (ALCTS) comes in. Librarians working in their code editors will want this resource, with its 58 sample coding examples, at their side. It covers essential background information, with a quick review of XML basics; transforming XML metadata in HTML; schema languages and workflows for XML validation; an introduction to XPath and XSLT; cataloging workflows using XSLT; the basics of XQuery, including use cases and XQuery expressions and functions; and working with strings and sequences, including regular expressions. This handbook will help teach cataloguers of all levels of experience how to code for efficiencies.