WCAG-CAC_csun12

transcript

Harmonizing WCAG Conformity Assessment Method

Session WEB-036CSUN 2012

Authors

• Dominique Burger : BrailleNet association, presidentContact : dominique.burger@upmc.fr

• Jean-Pierre Villain : Qelios company, technical directorContact : jpvillain@yahoo.fr

• Denis Boulay (speaker) : BrailleNet association, AccessiWeb director

Contact : denis.boulay@accessiweb.org

We are from here

Content of the session

• Presentation of the WCAG CAC (Conformity Assessment Cohenrence) project

• Description of a list’s management tool

• Demonstration of the tool prototype

WCAG 2.0 is the universal reference for Web Accessibility

• Europe : Communication "Towards an accessible information society" (1.12.2008)

• France : Law on the rights of people with disabilities – Article 47 : accessibility of public online services (11.02.2005)Creation of an e-accessibility checklist (RGAA) based on WCAG 2.0 (23.10.2009)

Demand for independent conformity assessment

Third Party Certification

• Quality Marks :• Assessment methods• Checklist• Single tests

• Certification Process

Several schemes have emerged

• Belgium• France• Italy• Spain• UK

All refering to WCAG2.0 !It works locally in different countries

Practical questions

• Do they really cover 100% WCAG2.0 ?• Do they provide additional information ?• What correspondences between them ?• Do they tell the same story about Web sites ?• Is it possible to certify in one country using a scheme

developed in another ?

WCAG Conformity Assessment Coherence - Phase 1

• Sample pages (32) covering all WCAG AA• Evaluation by experts according their checklists• Comparison of the results• Descriptive Questionnaire to learn more about

each checklist and assessment methods

WCAG Conformity Assessment Coherence - Phase 2

Development of a tool :

• Model of Data• Proof of concept

The project has two main objectives

Analyse Use

1. Provide analysis tools to assure the relation between :

1. a checklist to WCAG2. a checklist to another

checklist3. several checklists to WCAG4. several checklists to one

checklist

1. Provide tools for the expert in order to :

1. adapt a checklist to a web project

2. use several checklists for a same web project

3. Facilitate maintenance and update of checklists

WCAG CAC project

UWEM (Unified Web Evaluation Methodology) Solution

Objective : provide a common recognition scheme based on multiple checklists

Common checklist

Lowest common denominator

Rarely used

Not adapted to checklists, practices and tools used locally

Allow to :

1. Choose a working checklist (eg. AW)2. Choose targeted checklists

Obtain a version of your working checklist adapted to the constraints and requirements of all targeted checklists

The expert, his working checklist and a web project

Problem Solution

Objective : work only on what is useful

A checklist covers all possible cases

Increase of the expert work

A lot of « noise » due to the unnecessary criteria presence in the

context of the project

Allow to :1. Adapt a checklist :

1. Only useful elements2. add personalized criteria, key-

words, modify the structure

Obtain a version of its working checklist really adapted to the targeted projectMore complexity in the results analysis

ProblemChecklists have different structures

Checklists Nb of elements Description Notes

WCAG 2.0 4 Principle Guideline Success criterion Techniques

AccessiWeb 2.1 4 Thematic Criterion Test Conditions

AnySurfer 2 Bloc Guideline

Abilitynet 1 Success criterion

Technosite/MEWA 1 Criterion

UWEM 2 4 Principle Guideline Success criterion Techniques

Problem

Checklists Nb of elements Description Notes

WCAG 2.0 4 Principle Guideline Success criterion Techniques

AccessiWeb 2.1 4 Thematic Criterion Test Conditions

AnySurfer 2 Bloc Guideline

Abilitynet 1 Success criterion

Technosite/MEWA 1 Criterion

UWEM 2 4 Principle Guideline Success criterion Techniques

The relationship to WCAG is established via a measuring level belonging to each checklist

Resulting data model

WCAG CAC

Physical Data View

The constraint of the Data Model

A unique measuring level

Case of AnySufer

Original structure :- Bloc

- Guideline (mesuring level) - Critère (mesuring level)

"Rectifying" structure- Bloc

- Guideline (mesuring level)

A one-to-one relationship with WCAG

A measuring level is defined by :

1. A main success criterion2. One or several additional

success criteria

The relationship with WCAG is defined by the main success criterion

Model of correspondence request

Requests

1. Fusion (Request « Via ») : to mix the checklists

2. Comparison (Request « Vs »)1. Completion : add informations2. Difference : remove information

Example for request « Via »

Common structure

AW 2.1

Via WCAG

Resulting structure

Example of a complex request

Common structure

AW 2.1

+ RGAA

+ AnySurfer

Resulting structure

AW 2.1

AnySurfer

AW 2.1

The request displays AccessiWeb 2.1 checklist with, for each test, all RGAA and Anysurfer checklist’s tests to add : all those who have no correspondence with AccessiWeb 2.1 checklist

Prototype1. Validate the data model 2. Elaborate the requests engine3. Testing all the requests

Phase 1 : simple case

Checklist

Phase 2 : more complex cases

Checklist

ChecklistChecklistChecklistChecklist

WCAGCAC

Online Demo

Thank you

Questions ?

WCAG-CAC_csun12

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