ISO IEC 23761:2021 pdf download – Digital publishing — EPUB accessibility — Conformance and discoverability requirements for EPUB publications. 6 Discoverability 6.1 General Unlike web pages, EPUB publications are designed to be distributed through many channels for personal consumption — a model that has made EPUB a successful format for ebooks and other types of digital publications. A consequence of this model, however, is that specific details about the accessibility of a publication need to travel with it. An online bookstore aggregating content from publishers and authors, for example, does not know the production quality that went into each submission...