Accessibility standard: WCAG 2.1 AA
Why this information is here
This section outlines the accessibility features of this content - including support for screen readers,
full keyboard navigation and high-contrast display options. This may not be relevant for you.
Accessibility Information
The HTML of this book
complies with version 2.1 of the
Web Content Accessibility Guidelines
(WCAG), covering newer accessibility requirements and improved
user experiences and achieves the intermediate
(AA)
level of WCAG compliance, covering a wider range of accessibility requirements.Content Navigation
Table of contents navigation
Allows you to navigate directly to chapters, sections, or non‐text items
through a linked table of contents, reducing the need for extensive scrolling.
Index navigation
Provides an interactive index, letting you go straight to where a term or
subject appears in the text without manual searching.
Reading Order & Textual Equivalents
Single logical reading order
You will encounter all content (including footnotes, captions, etc.) in a clear,
sequential flow, making it easier to follow with assistive tools like screen readers.
Short alternative textual descriptions
You get concise descriptions (for images, charts, or media clips), ensuring you do
not miss crucial information when visual or audio elements are not accessible.
Full alternative textual descriptions
You get more than just short alt text: you have comprehensive text equivalents,
transcripts, captions, or audio descriptions for substantial non‐text content,
which is especially helpful for complex visuals or multimedia.
Visual Accessibility
Use of colour is not sole means of conveying information
You will still understand key ideas or prompts without relying solely on
colour, which is especially helpful if you have colour vision deficiencies.
Structural and Technical Features
ARIA roles provided
You gain clarity from ARIA (Accessible Rich Internet Applications) roles and attributes,
as they help assistive technologies interpret how each part of the content functions.
Open access