How Compliance with
Mobile Web Best Practices 1.0 Helps with
Web Content Accessibility Guidelines 2.0

Introduction

Incomplete draft: This document is an editor's copy that has no official standing and is incomplete. Particularly, the section WCAG 2.0 and MWBP Together is only an outline; WCAG 1.0 to MWBP is only partly filled out. It is subject to major changes and is therefore not intended for implementation. It is provided for review and feedback only. Please send feedback to public-bpwg-comments@w3.org (archive).

This page is part of a suite of related documents. Please refer to the “How to Use These Documents” section for more information.

It describes how some Mobile Web Best Practices (MWBPs) help with achieving compliance with the Web Content Accessibility Guidelines 2.0 (WCAG). For content that already complies with MWBP, it outlines what may need to be done to comply with all of WCAG.

As described in this section, many Mobile Web BPs have the added benefit of partial or complete compliance with certain WCAG success criteria. However, the accessibility guidelines are often more detailed or describe a different aspect of the same concept. It should not be assumed that following any BP will ensure accessibility. To ensure accessibility it is important to always consult the Web Content Accessibility Guidelines.

Summary of work required to make content that meets MWBP also meet WCAG 2.0

Compliance with the MWBP helps go some way towards achieving compliance with some WCAG 2.0 success criteria. This section provides a summary of these SC. For those SC not listed, there is no synergy between the recommendations.

Nothing: content already complies with these SCs. The list is provided for completeness.

• 1.1.1, Non-text Content, covered by NON-TEXT_ALTERNATIVES.
• 1.4.1 Use of Color, covered by USE_OF_COLOR. Note: However, it is important to taken into account that unlike the MWBP, the accessibility guidelines specify the ways that color may be used. Comment: Should the preceding sentence be here, or should there be a detail section about this SC? Or should the proviso be dropped? Or should it be moved to the “Something” list? At present it's parked here.
• 1.4.4, Resize text covered by MEASURES.
• 2.4.3 Focus Order, covered by TAB_ORDER.
• 2.4.10 Section Headings, covered by STRUCTURE. Tip: Although the BP has a generic title covering all structural elements, it only mentions section headings. Using other commonly-accepted structural elements not mentioned in the BP can improve usability for mobile users as well as accessibility, and give go some way toward compliance with WCAG success criterion 1.3.1 Info and Relationships. These elements include lists, quotations and citations, table markup, and semantic aspects like emphasis.
• 4.1.1, Parsing covered by VALID_MARKUP.

Something: some more effort of some kind or a check, will be necessary to ensure compliance with these SCs. Refer to the sections below on each success criterion for an explanation of how and in what way the BPs partially or possibly help to meet the SC.

• 1.3.1, Info and Relationships partially covered by FONTS, STRUCTURE, STYLE_SHEETS_SUPPORT, STYLE_SHEETS_USE.
• 1.3.2, Meaningful Sequence possibly covered by TABLES_LAYOUT.
• 1.4.3, Contrast (Minimum), possibly covered by BACKGROUND_IMAGE_READABILITY and COLOR_CONTRAST.
• 1.4.6, Contrast (Enhanced), possibly covered by BACKGROUND_IMAGE_READABILITY and COLOR_CONTRAST.
• 1.4.8, Visual Presentation, partially covered by SCROLLING.
• 2.1.1, Keyboard possibly covered by OBJECTS_OR_SCRIPT.
• 2.1.3, Keyboard (No Exception) possibly covered by OBJECTS_OR_SCRIPT
• 2.4.2, Page Titled, possibly covered by PAGE_TITLE.
• 2.4.4, Link Purpose (In Context), covered by LINK_TARGET_ID, possibly partially covered by IMAGE_MAPS.
• 2.4.6, Labels Descriptive, possibly partially covered by STRUCTURE and CONTROL_LABELLING.
• 2.4.9, Link Purpose (Link Only), covered by LINK_TARGET_ID, possibly partially covered by IMAGE_MAPS.
• 3.1.5, Reading Level, possibly covered by CLARITY.
• 3.2.1, On Focus, partially covered by POP_UPS.
• 3.2.2, On Input, partially covered by POP_UPS.
• 3.2.3, Consistent Navigation partially covered by NAVIGATION.
• 3.2.5 Change on Request, possibly covered by AUTO_REFRESH, POP_UPS and REDIRECTION.
• 3.3.2 Labels or Instructions, partially covered by CONTROL_LABELLING and CONTROL_POSITION.
• 4.1.2, Name, Role, Value, partially covered by CONTROL_LABELLING and NO_FRAMES.

For all other success criteria, the MWBP do not ensure compliance and it will be necessary to [do the work]. (Comment: these are listed temporarily at the end of the document under SCs with no coverage.)

Addressing WCAG 2.0 Success Criteria

1.3.1 Info and Relationships

Back to list of WCAG 2.0 checkpoints

1.3.2 Meaningful Sequence

Back to list of WCAG 2.0 checkpoints

1.4.3 Contrast (Minimum)

Back to list of WCAG 2.0 checkpoints

1.4.6 Contrast (Enhanced)

Back to list of WCAG 2.0 checkpoints

1.4.8 Visual Presentation

Back to list of WCAG 2.0 checkpoints

2.1.1 Keyboard

Back to list of WCAG 2.0 checkpoints

2.1.3 Keyboard (No Exception)

Back to list of WCAG 2.0 checkpoints

2.4.2 Page Titled

Back to list of WCAG 2.0 checkpoints

2.4.4 Link Purpose (In Context)

Back to list of WCAG 2.0 checkpoints

2.4.6 Labels Descriptive

Back to list of WCAG 2.0 checkpoints

2.4.9 Link Purpose (Link Only)

Back to list of WCAG 2.0 checkpoints

3.1.5 Reading Level

3.2.1 On Focus

Back to list of WCAG 2.0 checkpoints

3.2.2 On Input

Back to list of WCAG 2.0 checkpoints

3.2.3 Consistent Navigation

3.2.5 Change on Request

Back to list of WCAG 2.0 checkpoints

3.3.2 Labels or Instructions

Back to list of WCAG 2.0 checkpoints

4.1.2 Name, Role, Value

Back to list of WCAG 2.0 checkpoints

SCs with no coverage

This list is provided as a completeness check during editing and will be removed in the final document, as discussed by EOWG.

• 1.1.2, Live Audio-only (AAA)
• 1.2.1, Captions (Prerecorded) (A)
• 1.2.2, Audio Description or Full Text Alternative (A)
• 1.2.3, Captions (Live) (AA)
• 1.2.4, Audio Description (AA)
• 1.2.5, Sign Language (AAA)
• 1.2.6, Audio Description (Extended) (AAA)
• 1.2.7, Full Text Alternative (AAA)
• 1.3.3, Sensory Characteristics (A)
• 1.4.2, Audio Control (A)
• 1.4.5, Images of Text (Limited) (AA)
• 1.4.7, Low or No Background Audio (AAA)
• 1.4.9, Images of Text (Essential) (AAA)
• 2.1.2, No Keyboard Trap (A)
• 2.2.1, Timing Adjustable (A)
• 2.2.2, Pausing (AA)
• 2.2.3, No Timing (AAA)
• 2.2.4, Interruptions (AAA)
• 2.2.5, Re-authenticating (AAA)
• 2.3.1, Three Flashes or Below Threshold (A)
• 2.3.2, Three Flashes (AAA)
• 2.4.1, Bypass Blocks (A)
• 2.4.5, Multiple Ways (AA)
• 2.4.7, Focus Visible (AA)
• 2.4.8, Location (AAA)
• 3.1.1, Language of Page (A)
• 3.1.2, Language of Parts (AA)
• 3.1.3, Unusual Words (AAA)
• 3.1.4, Abbreviations (AAA)
• 3.1.6, Pronunciation (AAA)
• 3.2.4, Consistent Identification (AA)
• 3.3.1, Error Identification (A)
• 3.3.3, Error Suggestion (AA)
• 3.3.4, Error Prevention (Legal, Financial, Data) (AA)
• 3.3.5, Help (AAA)
• 3.3.6, Error Prevention (All) (AAA)