Accessibility level - possible values

The ONIX code can be used to describe accessibility metadata in ONIX 3, ONIX 2.1, or Dynamic Excel.

The alternative code can be used to import accessibility metadata using the AccessibilityFeature tag in Dynamic Excel.

ONIX code (list 196)	Alternative code	Description
00	`accessibility_summary`	Accessibility summary. Additional field: Short description of available accessibility options.
01	`lia_compliance_scheme`	LIA Compliance Scheme.
02	`epub_accessibility_specification_1_0_a`	EPUB Accessibility Specification 1.0 A. Additional field: URL pointing to a compliance report or certification from an independent third party.
03	`epub_accessibility_specification_1_0_aa`	EPUB Accessibility Specification 1.0 AA. Additional field: URL pointing to a compliance report or certification from an independent third party.
05	`pdf_ua`	PDF/UA.
09	`inaccessible`	Inaccessible.
10	`no_reading`	No reading system accessibility options disabled, except those described in the protection options.
11	`toc_navigation`	Table of contents navigation.
12	`index_navigation`	Index navigation.
13	`reading_order`	Logical reading order including visually separated text and non-textual elements, excluding purely decorative elements.
14	`short_alternative_descriptions`	Short alternative descriptions.
15	`full_alternative_descriptions`	Full alternative descriptions.
16	`non_graphical_data`	Visualised data also available as non-graphical data.
17	`accessible_math_content`	Accessible math content.
18	`accessible_chem_content`	Accessible chem content.
19	`print_equivalent_page_numbering`	Print-equivalent page numbering.
20	`synchronized_pre_recorded_audio`	Synchronised pre-recorded audio.
21	`text_to_speech_hinting`	Elements facilitating text-to-speech (PLS lexicons, SSML or CSS Speech synthesis hints).
22	`language_tagging_provided`	The language of the text has been specified at the file level, but also at the word level for some words in a foreign language.
24	`dyslexia_readability`	Dyslexia readability. Additional field: Details (for example, the name of the particular font used).
25	`use_of_color`	Use of distinctive elements other than color.
26	`use_of_contrast`	Use of contrast (minimum ratio of 4.5:1, or 3:1 for titles).
27	`use_of_audio`	Audio content with no background noise, or where the background noise is at least 20 decibels below the level of foreground speech.
28	`full_alternative_audio_descriptions`	Full alternative audio descriptions.
29	`next_previous_navigation`	All levels of heading and other structural elements of the content are correctly marked up and numbered to enable fast next/previous navigation.
93	`compliance_certification_by`	Compliance certification by. Additional field: URL to the website of the certification body.
94	`compliance_web_page_for_details`	Compliance web page for detailed accessibility information. Additional field: URL pointing to the web page.
95	`trusted_intermediary_web_page_for_details`	Trusted intermediary’s web page for detailed accessibility information. Additional field: URL pointing to the web page.
96	`publisher_web_page_for_details`	Publisher’s web page for detailed accessibility information. Additional field: URL pointing to the web page.
97	`compatibility_tested`	Compatibility tested. Additional field: link to a web page that describes the tests performed.
98	`trusted_intermediary_contact`	Trusted Intermediary contact. Additional field: email address.
99	`publisher_contact`	Publisher contact for further accessibility information. Additional field: email address.