On November 19th, XBRL US released the Taxonomy Development Handbook for public review. The handbook is a comprehensive guide that directs regulators, industry experts, and businesses through a practical roadmap to building high quality data standards with XBRL. This freely available, foundational document takes readers through the necessary stages of standards development, including: 1) building the appropriate transport data model, 2) assessing project scope, including use cases and requirements, 3) establishing a governance structure, 4) documenting the standards program, and 5) the step-by-step mechanics of building the taxonomy. The handbook also contains an introduction to the XBRL financial data standard, templates to guide developers in documenting the taxonomy, and case studies of XBRL as a method of improving data reporting in various industries.