What does the EPUB accessMode define?

The accessMode in EPUB is used to define how content is accessed by users, particularly focusing on the experience of users with various disabilities. It emphasizes the cognitive processes involved in perceiving content, such as through visual, auditory, or tactile means. By specifying accessMode, creators can indicate the types of interactions available, such as whether text is presented visually or as read-aloud audio. This serves as an important part of making content more inclusive, ensuring that it is usable by as many people as possible.

Understanding the accessMode helps content creators decide on the appropriate formats for their materials, ensuring compliance with accessibility guidelines and enhancing the experience for readers with different needs. This mode plays a critical role in defining the accessibility features of EPUB publications, contributing to a more equitable reading experience.